INTERNATIONAL RECTIFIER CORP /DE/
S-3/A, 1994-11-16
SEMICONDUCTORS & RELATED DEVICES
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<PAGE>
   
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON NOVEMBER 16, 1994
    
   
                                                       REGISTRATION NO. 33-56245
    
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                            ------------------------

   
                                AMENDMENT NO. 1
                                       TO
                                    FORM S-3
    
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933

                            ------------------------

                      INTERNATIONAL RECTIFIER CORPORATION
             (Exact name of registrant as specified in its charter)

<TABLE>
<S>                                       <C>
               DELAWARE                                 95-1528961
   (State or other jurisdiction of                   (I.R.S. Employer
    incorporation or organization)                 Identification No.)
</TABLE>

                               233 KANSAS STREET
                          EL SEGUNDO, CALIFORNIA 90245
                                 (310) 322-3331
         (Address, including zip code, and telephone number, including
            area code, of registrant's principal executive offices)

                                   ERIC LIDOW
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                      INTERNATIONAL RECTIFIER CORPORATION
                               233 KANSAS STREET
                          EL SEGUNDO, CALIFORNIA 90245
                                 (310) 322-3331
      (Name, address, including zip code, and telephone number, including
                        area code, of agent for service)

                            ------------------------

                                   COPIES TO:

                             Gerald A. Koris, Esq.
                               233 Kansas Street
                          El Segundo, California 90245
                                 (310) 640-6552

<TABLE>
<S>                                 <C>
     Kendall R. Bishop, Esq.               John R. Light, Esq.
        O'Melveny & Myers                    Latham & Watkins
  1999 Avenue of the Stars, 7th     633 West Fifth Street, Suite 4000
              Floor                   Los Angeles, California 90071
Los Angeles, California 90067-6035            (213) 485-1234
          (310) 553-6700
</TABLE>

                            ------------------------

   
          APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO PUBLIC:
AS SOON AS PRACTICABLE AFTER THE EFFECTIVE DATE OF THIS REGISTRATION STATEMENT.
    

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                                EXPLANATORY NOTE

    This  Registration  Statement contains  a  Prospectus relating  to  a public
offering in the United States and  Canada (the "U.S. Offering") of an  aggregate
of 3,600,000 shares of Common Stock, $1.00 par value, of International Rectifier
Corporation  (the  "Common  Stock"),  together  with  separate  Prospectus pages
relating to a  concurrent offering outside  the United States  and Canada of  an
aggregate  of 900,000 shares of Common Stock (the "International Offering"). The
prospectuses for  the  U.S. Offering  and  the International  Offering  will  be
identical   with  the  exception  of  the  following  alternate  pages  for  the
International Offering: a front  cover page, a back  cover page, and a  "Certain
United States Federal Tax Consequences to Non-United States Holders" section.
<PAGE>
INFORMATION   CONTAINED  HEREIN  IS  SUBJECT   TO  COMPLETION  OR  AMENDMENT.  A
REGISTRATION STATEMENT  RELATING TO  THESE SECURITIES  HAS BEEN  FILED WITH  THE
SECURITIES  AND EXCHANGE  COMMISSION. THESE SECURITIES  MAY NOT BE  SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR  TO THE TIME THE REGISTRATION STATEMENT  BECOMES
EFFECTIVE.  THIS  PROSPECTUS  SHALL  NOT  CONSTITUTE AN  OFFER  TO  SELL  OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE  SECURITIES
IN  ANY STATE IN WHICH SUCH OFFER,  SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
<PAGE>
   
                 Subject to Completion, dated November 16, 1994
    
PROSPECTUS
   
                                4,500,000 SHARES
                                     [LOGO]
    

                      INTERNATIONAL RECTIFIER CORPORATION
                                  COMMON STOCK
                                ----------------

    All of the 4,500,000 shares of Common Stock, par value $1.00 per share  (the
"Shares"),  offered hereby are being sold by International Rectifier Corporation
("IR" or  the "Company").  Of  the 4,500,000  shares  of Common  Stock  offered,
3,600,000  shares will be offered  initially in the United  States and Canada by
the U.S. Underwriters (the "U.S. Offering")  and 900,000 shares will be  offered
concurrently  outside the United States and Canada by the International Managers
(the  "International  Offering"  and,  together  with  the  U.S.  Offering,  the
"Offerings").  The offering price and underwriting discounts and commissions for
the U.S.  Offering  and  the  International  Offering  will  be  identical.  See
"Underwriting."

    The  Company's Common Stock is listed on the New York Stock Exchange and the
Pacific Stock Exchange under the symbol "IRF." On October 27, 1994, the  closing
price  for the Company's Common  Stock on the New  York Stock Exchange Composite
Tape was  $23.625 per  share. See  "Price  Range of  Common Stock  and  Dividend
Policy."
                             ---------------------

    SEE "RISK FACTORS" FOR CERTAIN MATTERS RELEVANT TO AN INVESTMENT IN THE
                            COMPANY'S COMMON STOCK.
                             ---------------------

THESE  SECURITIES  HAVE  NOT  BEEN APPROVED  OR  DISAPPROVED  BY  THE SECURITIES
    AND EXCHANGE  COMMISSION  OR ANY  STATE  SECURITIES COMMISSION  NOR  HAS
       THE    SECURITIES   AND   EXCHANGE   COMMISSION   OR   ANY   STATE
           SECURITIES  COMMISSION   PASSED  UPON   THE  ACCURACY   OR
              ADEQUACY  OF  THIS  PROSPECTUS.  ANY  REPRESENTATION
                      TO THE CONTRARY IS A CRIMINAL OFFENSE.

   
<TABLE>
<CAPTION>
                                                                Underwriting
                                                                 Discounts
                                               Price                and             Proceeds to
                                             to Public        Commissions (1)       Company (2)
<S>                                      <C>                 <C>                 <C>
Per Share..............................  $                   $                   $
Total (3)..............................  $                   $                   $
<FN>
(1)  The  Company  has  agreed  to  indemnify  the  U.S.  Underwriters  and  the
     International  Managers against certain  liabilities, including liabilities
     under the Securities Act of 1933, as amended. See "Underwriting."
(2)  Before deducting estimated expenses of the Offerings of $475,000 payable by
     the Company.
(3)  The Company  has  granted  the  U.S.  Underwriters  and  the  International
     Managers  a 30-day  option to purchase  up to 675,000  additional shares of
     Common Stock on the same terms and conditions as set forth above solely  to
     cover  over-allotments, if  any. If such  option is exercised  in full, the
     total Price to Public, Underwriting Discounts and Commissions and  Proceeds
     to  Company will be $          , $           and $          , respectively.
     See "Underwriting."
</TABLE>
    

                             ---------------------

    The shares of  Common Stock offered  by this Prospectus  are offered by  the
U.S.  Underwriters  subject  to  prior  sale,  to  withdrawal,  cancellation  or
modification of the offer without notice,  to delivery to and acceptance by  the
U.S.  Underwriters  and  to  certain further  conditions.  It  is  expected that
delivery of the Shares will be made at the offices of Lehman Brothers Inc.,  New
York, New York, on or about            , 1994.
                             ---------------------
LEHMAN BROTHERS

             KIDDER, PEABODY & CO.
                         INCORPORATED

                           MONTGOMERY SECURITIES

                                        PAINEWEBBER INCORPORATED

                                                               SMITH BARNEY INC.

              , 1994
<PAGE>
                           [INSIDE FRONT COVER PHOTO]

[PHOTO1]
Schematic  illustration  of generic  automobile showing  color-coded application
points for International Rectifier components.

[CAPTION]
In recent model years the proliferation of safety and comfort features that  use
electronic  components  has  made  automobiles  the  fastest-growing  market for
International Rectifier products.

    IN  CONNECTION  WITH   THE  OFFERINGS,   THE  U.S.   UNDERWRITERS  AND   THE
INTERNATIONAL  MANAGERS MAY OVER-ALLOT OR EFFECT TRANSACTIONS WHICH STABILIZE OR
MAINTAIN THE MARKET PRICE OF  THE COMPANY'S COMMON STOCK  AT A LEVEL ABOVE  THAT
WHICH  MIGHT  OTHERWISE PREVAIL  IN THE  OPEN MARKET.  SUCH TRANSACTIONS  MAY BE
EFFECTED ON  THE NEW  YORK STOCK  EXCHANGE OR  OTHERWISE. SUCH  STABILIZING,  IF
COMMENCED, MAY BE DISCONTINUED AT ANY TIME.

                                       2
<PAGE>
                               PROSPECTUS SUMMARY

    THE  FOLLOWING SUMMARY  IS QUALIFIED  IN ITS  ENTIRETY BY  THE MORE DETAILED
INFORMATION AND FINANCIAL  STATEMENTS AND NOTES  THERETO APPEARING ELSEWHERE  OR
INCORPORATED  BY REFERENCE IN  THIS PROSPECTUS. UNLESS  OTHERWISE INDICATED, ALL
INFORMATION IN THE PROSPECTUS ASSUMES NO EXERCISE OF THE U.S. UNDERWRITERS'  AND
INTERNATIONAL   MANAGERS'  OVER-ALLOTMENT   OPTION  (SEE   "UNDERWRITING").  THE
COMPANY'S FISCAL YEAR  END IS  JUNE 30  (SEE "NOTE  1 --  NOTES TO  CONSOLIDATED
FINANCIAL STATEMENTS").

                                  THE COMPANY

    International  Rectifier  Corporation ("IR"  or  the "Company")  is  a major
worldwide  supplier  of  power  semiconductors,  which  convert  electricity  in
products  using electrical  current. The  Company's trademarked  HEXFET-R- power
MOSFETs (Metal Oxide Semiconductor  Field Effect Transistors), IGBTs  (Insulated
Gate  Bipolar  Transistors),  rectifiers  and thyristors  enable  IR  to provide
customers with integrated solutions to their power conversion needs.

    According to statistics published by the Semiconductor Industry  Association
("SIA")  for  calendar 1993,  the Company  had a  17% market  share of  the $1.1
billion power MOS transistor segment, comprised  of power MOSFETs and IGBTs.  In
addition,  the Company sold approximately $19.1 million of power MOSFET and IGBT
chips and wafers  to third parties  in calendar 1993.  Accordingly, the  Company
believes  it  is the  world leader  in  the power  MOS transistor  market. Power
MOSFETs, IGBTs,  chips and  wafers comprised  over two-thirds  of the  Company's
fiscal  1994 sales.  SIA data  indicates that  industry-wide sales  of power MOS
transistors in calendar 1993 increased 23% over 1992 levels, and that, over  the
past  five years, power  MOSFET and IGBT  sales have grown  at an average annual
rate of 26%.

    Applications for the Company's products include:

    AUTOMOBILES: anti-lock braking systems, fuel injection systems, air bags and
power accessories;
    COMMUNICATIONS EQUIPMENT: telephone networks, satellites and modems;
    COMPUTERS AND PERIPHERALS: power supplies and disk drives in desktop,
mainframe and portable computers and printers;
    CONSUMER ELECTRONICS AND LIGHTING: fluorescent lighting ballasts, home
entertainment equipment and household appliances;
    INDUSTRIAL EQUIPMENT: motor-driven production lines, instrumentation and
test equipment, machine tools, fork lifts and welders; and
    OFFICE EQUIPMENT: copiers and facsimile machines.

    The Company has operated internationally for 35 years. In fiscal 1994,  over
50%  of the  Company's sales  were to  foreign customers,  divided almost evenly
between Europe and Asia, and the  remainder were to customers in North  America.
The   Company's  customers  include   global  industry  leaders   such  as  AT&T
Technologies Inc., Conner Peripherals, Inc., General Motors Corporation, Hewlett
Packard Co., International Business Machines Corp., Matsushita Electric Industry
Company, Ltd., Sanken Electric Company, Ltd., Siemens AG and Sony Corporation.

    To meet rising demand  for power MOS transistors,  the Company is  expanding
its  wafer fabrication  capacity at  HEXFET America,  its power  MOSFET plant in
Temecula, California.  The  estimated $75.0  million  expansion, which  will  be
funded  in part with the  proceeds of the Offerings,  should be completed by the
end of calendar 1995. The expansion  is estimated ultimately to increase  HEXFET
America's  wafer fabrication  capacity by about  75%. See "Use  of Proceeds" and
"Business -- Manufacturing."

    At September 30,  1994, the Company  had an order  backlog of  approximately
$132.5  million as compared  to $85.6 million  at September 30,  1993 and $121.8
million at June 30, 1994.

    Reference is made to  the Glossary for the  definition of certain  technical
terms used in this Prospectus.

                                       3
<PAGE>
                                 THE OFFERINGS

<TABLE>
<S>                                                              <C>
Common Stock offered by the Company.............................. 4,500,000 shares
Common Stock outstanding after the Offerings..................... 24,892,323(1)
New York Stock Exchange Symbol................................... IRF
Use of Proceeds.................................................. To  expand the Company's wafer fabrication capacity at its HEXFET
                                                                 America facility, repay debt  and for general corporate  purposes
                                                                 including working capital.
<FN>
- ------------------------
(1)  Based  on 20,392,323 shares outstanding on September 30, 1994 and excluding
     an  aggregate  of  268,320  shares   issuable  upon  exercise  of   options
     outstanding on September 30, 1994 under the Company's stock option plans.
</TABLE>

                         SUMMARY FINANCIAL INFORMATION

<TABLE>
<CAPTION>
                                  THREE MONTHS
                                ENDED SEPTEMBER
                                30, (UNAUDITED)   FISCAL YEARS ENDED JUNE 30,
                                ----------------  ----------------------------
                                 1994     1993      1994      1993      1992
                                -------  -------  --------  --------  --------
                                   (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
<S>                             <C>      <C>      <C>       <C>       <C>
OPERATING RESULTS
Revenues......................  $92,253  $73,094  $328,882  $281,732  $265,495
Gross profit..................   31,514   23,420   108,938    79,048    79,058
Operating profit..............    8,917    3,260    23,549     2,328    10,882
Interest expense, net.........     (912)    (760)   (3,625)   (2,250)   (1,436)
Income (loss) before income
 taxes........................    7,826    2,306    18,874    (2,597)   10,512
Net income (loss).............    6,498    1,976    15,714    (3,033)    9,237
Net income (loss) per share...  $  0.32  $  0.10  $   0.78  $  (0.15) $   0.46
Average common and common
 equivalent shares
 outstanding..................   20,596   20,360    20,428    20,087    20,107
</TABLE>

<TABLE>
<CAPTION>
                                                      SEPTEMBER 30, 1994
                                                         (UNAUDITED)
                                                    ----------------------
                                                     ACTUAL   ADJUSTED (1)
                                                    --------  ------------
<S>                                                 <C>       <C>
                                                        (IN THOUSANDS)
BALANCE SHEET
Working capital...................................  $ 66,888    $167,901
Total assets......................................   348,489     432,602
Short-term debt...................................    41,467      24,567
Long-term debt, less current maturities...........    28,605      28,605
Stockholders' equity..............................   210,303     311,316
<FN>
- ------------------------
(1)  Adjusted to reflect the sale of 4,500,000 shares by the Company pursuant to
     the Offerings, and the application of the net proceeds.
</TABLE>

                                       4
<PAGE>
                                  THE COMPANY

    IR  is  a major  worldwide supplier  of  power semiconductors  which convert
electricity at relatively high  voltage and current levels  in products such  as
automobiles,  communications  equipment,  computers  and  peripherals,  consumer
electronics and lighting, industrial equipment and office equipment. The process
of power conversion can be viewed in four stages: input rectification,  control,
switching  and  output  rectification. Input  rectification  conditions off-line
electricity, typically  rectifying alternating  current to  direct current.  The
control  function measures incoming electricity and  sends a signal to a switch.
The switch  packages  the  current into  discrete  units.  Output  rectification
reconfigures   the  elements  into  a  form  useable  by  electrically  operated
equipment. IR supplies products that perform each of these four basic functions.

    IR was founded  as a California  corporation in 1947  and reincorporated  in
Delaware  in 1979. Its  executive offices are  located at 233  Kansas Street, El
Segundo, California 90245 and its telephone number is (310) 322-3331.

                                  RISK FACTORS

    Prospective investors  should carefully  consider the  following factors  in
addition  to  the other  information provided  elsewhere  in this  Prospectus or
incorporated by reference herein  in evaluating an  investment in the  Company's
Common Stock.

EXPANSION RISKS

    The  Company is expanding wafer fabrication  capacity at HEXFET America, its
power MOSFET plant  in Temecula, California.  Although the Company  has not  yet
experienced,  and does  not anticipate, any  delays in  construction or existing
production at HEXFET America,  there can be no  assurance that the Company  will
not  experience  such delays  or other  delays  in ramping  up production  or in
changing process technologies. See "Business -- Manufacturing."

MANUFACTURING RISKS

    The Company's manufacturing processes  are highly complex, require  advanced
and costly equipment and are continuously being modified in an effort to improve
yields  and product performance. Minute impurities  or other difficulties in the
manufacturing process can lower yields. In the past, the Company has experienced
assembly output  limitations  that  have  constrained sales.  There  can  be  no
assurance that the Company will not experience manufacturing difficulties in the
future.  In  addition,  although  HEXFET America  is  designed  to  resist large
magnitude earthquakes  and other  natural  disasters, the  Company's  operations
would  be  materially adversely  affected if  production  at this  facility were
interrupted. See "Business -- Manufacturing."

CONCENTRATION OF SUPPLIERS AND ASSEMBLERS

    Although the  Company  generally uses  materials  and parts  available  from
multiple  suppliers,  the Company  has only  a limited  number of  suppliers for
certain materials and  parts. The  Company has not  experienced any  substantial
production  delays from  materials or parts  shortages in the  past. The Company
believes that alternate suppliers for  these materials and parts are  available,
but  there can be no assurance that the Company will not experience interruption
of such supplies in the future.

    During IR's recent expansion program at HEXFET America, a subcontractor that
provided  assembly  for  up  to   30%  of  IR's  fastest-growing  product   line
discontinued   this  kind   of  production,  resulting   in  product  shortages.
Approximately 25% of the Company's power MOSFETs are currently assembled by  two
subcontractors in Southeast Asia. The Company believes that these subcontractors
and  alternative  assembly  subcontractors provide  adequate  assembly capacity.
Interruptions in assembly could, however, have a material adverse impact on  the
Company's  operations.  There can  be  no assurance  that  the Company  will not
experience  interruption  of  such  assembly  operations  in  the  future.   See
"Management's  Discussion  and Analysis  of Financial  Condition and  Results of
Operations."

SIGNIFICANT INTERNATIONAL OPERATIONS

    Over 50%  of the  Company's  revenues were  derived  from sales  in  foreign
markets  in fiscal  1994. The Company  expects revenues from  foreign markets to
continue to represent a significant portion of total revenues. The Company  owns
and  uses subcontract manufacturing  and assembly facilities  in England, Italy,

                                       5
<PAGE>
Mexico, Japan and the Philippines, among others, and sells products manufactured
domestically to foreign customers. The Company's foreign operations are  subject
to  the  usual  risks  that  may  affect  such  operations,  including  currency
fluctuations,  difficulty  collecting  receivables  and  possible   governmental
actions, tariffs, taxes, future import and export restrictions and political and
governmental changes.

TECHNOLOGICAL CHANGE

    The  power  semiconductor  market  is subject  to  technological  change and
evolving industry standards. To remain competitive, the Company must continue to
devote  significant  resources  to   advance  process  technologies  to   reduce
semiconductor  die size, increase product  performance and improve manufacturing
yields. There  can be  no  assurance that  the  Company's competitors  will  not
develop  new technologies that  are substantially equivalent  or superior to the
Company's patented  technology or  that the  Company will  be able  to  continue
enhancing  existing processes or  developing new technologies.  See "Business --
Research and Development," and "-- Competition."

PROTECTION OF INTELLECTUAL PROPERTY

    The Company relies on its patents and technological know-how to protect  its
market  position.  See  "Business --  Intellectual  Property." There  can  be no
assurance that the  Company will be  able to protect  its intellectual  property
rights  effectively.  In  addition,  protection  of  the  Company's intellectual
property rights in foreign markets is  not as strong as the protection  afforded
to  its  intellectual property  in the  United  States. From  time to  time, the
Company and certain companies  have asserted patent  rights against each  other.
The  Company is presently engaged in such litigation, involving power MOSFET and
IGBT patents, with one of  its competitors. There can  be no assurance that  the
Company  will  be successful  with respect  to  litigation or  other proceedings
involving patent rights or that such litigation might not increase the Company's
costs of doing business, expose the  Company to substantial monetary damages  or
interfere  with the sale  of its products.  The Company has  incurred, and could
incur in the future, substantial  costs protecting its intellectual property  or
defending infringement claims. See "Business -- Legal Proceedings."

SECURITIES LAWS LITIGATION

    The  Company,  its  directors  and  certain  officers  have  been  named  as
defendants in three  class action  lawsuits in California  which allege  certain
intentional  and  negligent  misrepresentations and  violations  of  the federal
securities laws in connection with the Company's public offering of common stock
in April 1991 and the  redemption in June 1991  of the Company's 9%  Convertible
Subordinated Debentures and certain other matters. Although the Company believes
that  the allegations in these lawsuits  are without merit, the ultimate outcome
cannot be presently  determined, and  a substantial judgment  or settlement,  if
any,  could have a material adverse  effect on the Company's financial condition
and results of operations. See "Business -- Legal Proceedings."

COMPETITION

    The Company competes with a number of different manufacturers in each of its
major  product  areas.  Many  of  these  companies  have  substantially  greater
financial,  technical, manufacturing  and marketing resources  than the Company.
IR's ability to compete depends upon a number of factors, including new  product
and process technologies introduced by the Company and its competitors, customer
acceptance  of the Company's products, cost-effective manufacturing, enforcement
of intellectual property rights and general market and economic conditions. Some
of these factors are  out of the  Company's control. There  can be no  assurance
that  the Company  will be  able to compete  successfully in  the future against
existing or potential competitors. See "Business -- Competition."

CHANGE OF CONTROL PROVISIONS

    The Company's  Certificate of  Incorporation and  Bylaws contain  provisions
that  make it more difficult for a third  party to acquire, or that discourage a
third party from attempting to acquire, control of the Company. In addition,  as
a Delaware corporation, the Company is subject to the restrictions imposed under
Section  203 of the  Delaware General Corporation Law  which prevent the Company
from engaging in  certain change  of control  transactions with  certain of  its
stockholders under certain circumstances. See "Description of Capital Stock."

                                       6
<PAGE>
STOCK PRICE VOLATILITY

    The  Company's  Common Stock  has  experienced substantial  price volatility
which  also   may  occur   in  the   future,  particularly   as  a   result   of
quarter-to-quarter  variations in the actual or anticipated financial results of
the Company or other companies in  the semiconductor industry or in the  markets
served  by  the Company,  or  announcements by  the  Company or  its competitors
regarding  new  product  introductions.  In  addition,  the  stock  market   has
experienced  extreme price and volume fluctuations that have affected the market
price of many  technology companies' stocks  in particular and  that have  often
been  unrelated to the  operating performance of  these companies. These factors
may adversely affect the market price of  the Common Stock. See "Price Range  of
Common Stock."

                                       7
<PAGE>
                                USE OF PROCEEDS

    The  net proceeds to  the Company from  the sale of  the 4,500,000 shares of
Common Stock offered  hereby are  estimated to be  approximately $101.0  million
($116.2  million  if the  Underwriters'  over-allotment option  is  exercised in
full). The  Company  anticipates spending  approximately  $70.1 million  of  the
proceeds  to  expand  its  wafer fabrication  capacity  at  HEXFET  America. See
"Business -- Manufacturing." Approximately $9.9 million of the proceeds will  be
used  to repay amounts outstanding under the Company's domestic revolving credit
facility and approximately $7.0  million of the proceeds  will be used to  repay
amounts  outstanding  under  short-term  foreign  loans.  The  interest  rate on
domestic borrowings to be  repaid is either  LIBOR plus 1.25%  or prime and  the
weighted  average rate on foreign debt that will be repaid was 7.9% at September
30, 1994. The remainder  of the proceeds  will be used  for working capital  and
general corporate purposes. Notwithstanding the debt repayments, the Company may
reborrow  in the  future to support  potential expansion  and growth activities.
Pending application of  the funds,  the net  proceeds may  be used  to pay  down
additional  short-term  debt  obligations  and may  be  invested  in short-term,
interest-bearing obligations.

                                 CAPITALIZATION

    The following table sets forth the unaudited consolidated capitalization  of
the  Company at September 30, 1994, and as  adjusted for the sale by the Company
of the 4,500,000 shares of Common  Stock offered hereby, and the application  of
the net proceeds therefrom as described under "Use of Proceeds."

<TABLE>
<CAPTION>
                                                                                              SEPTEMBER 30, 1994
                                                                                            ----------------------
                                                                                                            AS
                                                                                              ACTUAL     ADJUSTED
                                                                                            ----------  ----------
                                                                                                (IN THOUSANDS)
<S>                                                                                         <C>         <C>
Short-term debt:
  Bank loans..............................................................................  $   34,853  $   17,953
  Long-term debt -- due within one year, including current maturities.....................       6,614       6,614
                                                                                            ----------  ----------
                                                                                            $   41,467  $   24,567
                                                                                            ----------  ----------
                                                                                            ----------  ----------
Long-term debt, less current maturities:
  Capitalized lease obligations payable in varying monthly installments primarily at rates
   from 6.9% to 16.6%.....................................................................  $   11,747  $   11,747
  10.55% property mortgage due in equal monthly installments to 2011......................       4,170       4,170
  Domestic bank loans collateralized by equipment, payable in varying monthly installments
   at rates from 7.1% to 9.0%, due in 1995 through 1999...................................       4,834       4,834
  Foreign bank loans collateralized by property and/or equipment, payable in varying
   monthly installments at rates from 6.5% to 10.8%, due in 1997 through 2000.............       3,787       3,787
  Foreign unsecured bank loans payable in varying monthly installments at rates from 4.0%
   to 11.9%, due in 1998 through 2006.....................................................       4,067       4,067
                                                                                            ----------  ----------
                                                                                                28,605      28,605
                                                                                            ----------  ----------
Stockholders' equity:
  Common shares, $1.00 par value, 30,000,000 shares authorized, 20,392,323 shares issued
   and outstanding (24,892,323 shares as adjusted)(1).....................................      20,392      24,892
  Capital contributed in excess of par value of shares....................................     168,508     265,021
  Retained earnings.......................................................................      25,998      25,998
  Cumulative translation adjustments......................................................      (4,595)     (4,595)
                                                                                            ----------  ----------
    Total stockholders' equity............................................................     210,303     311,316
                                                                                            ----------  ----------
    Total capitalization..................................................................  $  238,908  $  339,921
                                                                                            ----------  ----------
                                                                                            ----------  ----------
<FN>
- ------------------------
(1)  Excludes  268,320 shares issuable upon exercise  of options pursuant to the
     Company's stock option plans as of September 30, 1994.
</TABLE>

                                       8
<PAGE>
                          PRICE RANGE OF COMMON STOCK

    The Company's Common Stock is traded on the New York Stock Exchange and  the
Pacific  Stock Exchange under  the symbol "IRF." The  following table sets forth
the range of high  and low closing prices  of the Common Stock  on the New  York
Stock Exchange Composite Tape for the periods presented.

<TABLE>
<CAPTION>
                                                            PRICE RANGE
                                                       ----------------------
FISCAL YEAR                                              HIGH          LOW
- --------------------------------------------------     --------      --------
<S>                                                    <C>           <C>
1993
  First Quarter...................................     $ 10          $  8
  Second Quarter..................................       13             8 7/8
  Third Quarter...................................       13 1/2        11
  Fourth Quarter..................................       12 5/8        10
1994
  First Quarter...................................       13 1/8        10 1/4
  Second Quarter..................................       14 7/8        10 1/4
  Third Quarter...................................       19            13 7/8
  Fourth Quarter..................................       17 1/8        13 1/2
1995
  First Quarter...................................       22 1/4        15 1/8
  Second Quarter (through October 27).............       24            19 1/4
</TABLE>

    The  closing price of the  Company's Common Stock is  set forth on the cover
page of this Prospectus. On October 20, 1994, the Company had 1,759 stockholders
of record.

                                DIVIDEND POLICY

    No dividends have been declared or  paid since October 1, 1981. The  Company
does  not intend to  pay cash dividends  in the foreseeable  future as all funds
will  be  reinvested  in  its  operations.  Furthermore,  under  certain  credit
agreements, the Company is not permitted to pay any cash dividends.

                                       9
<PAGE>
                      SELECTED CONSOLIDATED FINANCIAL DATA

    The  selected consolidated financial data  as of June 30,  1994 and 1993 and
for the fiscal years  ended June 30,  1994, 1993 and 1992  are derived from  the
audited  consolidated financial statements of the  Company and should be read in
conjunction with the  audited consolidated financial  statements and notes  with
respect  thereto included herein. The selected consolidated financial data as of
June 30, 1992, 1991 and 1990, and for  the fiscal years ended June 30, 1991  and
1990  are derived from audited consolidated  financial statements of the Company
which are not included  herein. Information at September  30, 1994 and 1993  and
for  the three month periods ended September  30, 1994 and 1993 is unaudited but
reflects all material adjustments  (consisting of normal recurring  adjustments)
which  in  the Company's  opinion are  necessary to  present the  information in
accordance with generally accepted accounting principles. The operating  results
for  the  three  month  period  ended September  30,  1994  are  not necessarily
indicative of the operating results for the full fiscal year.
<TABLE>
<CAPTION>
                                            THREE MONTHS ENDED
                                              SEPTEMBER 30,                   FISCAL YEARS ENDED JUNE 30,
                                           --------------------  -----------------------------------------------------
                                             1994       1993       1994       1993       1992       1991       1990
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                                              (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                        <C>        <C>        <C>        <C>        <C>        <C>        <C>
STATEMENT OF OPERATIONS DATA(1)
Revenues.................................  $  92,253  $  73,094  $ 328,882  $ 281,732  $ 265,495  $ 252,800  $ 229,863
Cost of sales............................     60,739     49,674    219,944    202,684    186,437    167,044    162,075
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
Gross profit.............................     31,514     23,420    108,938     79,048     79,058     85,756     67,788
Selling and administrative expense.......     18,486     16,350     69,008     62,637     58,771     51,544     41,526
Research and development expense.........      4,111      3,810     16,381     14,083      9,405      7,538      6,585
Restructuring charge.....................         --         --         --         --         --      1,000         --
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
Operating profit.........................      8,917      3,260     23,549      2,328     10,882     25,674     19,677
Interest expense, net....................       (912)      (760)    (3,625)    (2,250)    (1,436)   (13,266)   (17,062)
Other income (expense)...................       (179)      (194)    (1,050)    (2,675)     1,066      5,825          8
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
Income (loss) before income taxes and
 extraordinary item......................      7,826      2,306     18,874     (2,597)    10,512     18,233      2,623
Provision for income taxes...............      1,328        330      3,160        436      1,275      1,086        466
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
Income (loss) before extraordinary
 item....................................      6,498      1,976     15,714     (3,033)     9,237     17,147      2,157
Extraordinary item, net..................         --         --         --         --         --        726         --
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
Net income (loss)........................  $   6,498  $   1,976  $  15,714  $  (3,033) $   9,237  $  16,421  $   2,157
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
INCOME (LOSS) PER SHARE:
  Before extraordinary item..............  $    0.32  $    0.10  $    0.78  $   (0.15) $    0.46  $    1.30  $    0.18
  Extraordinary item.....................         --         --         --         --         --      (0.06)        --
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
  Net income (loss) per share............  $    0.32  $    0.10  $    0.78  $   (0.15) $    0.46  $    1.24  $    0.18
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
Average common and common equivalent
 shares outstanding......................     20,596     20,360     20,428     20,087     20,107     13,210     11,733
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------

<CAPTION>

                                             AT SEPTEMBER 30,                         AT JUNE 30,
                                           --------------------  -----------------------------------------------------
                                             1994       1993       1994       1993       1992       1991       1990
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                                                         (IN THOUSANDS)
<S>                                        <C>        <C>        <C>        <C>        <C>        <C>        <C>
BALANCE SHEET DATA
Working capital..........................  $  66,888  $  61,319  $  67,165  $  58,116  $  67,538  $  74,900  $  25,889
Total assets.............................    348,489    287,461    330,574    278,448    285,880    250,263    217,532
Short-term debt..........................     41,467     29,852     33,310     27,539     27,135     15,821     27,309
Long-term debt, less current
 maturities..............................     28,605     14,158     26,817     11,810     11,535     11,921    120,139
Stockholders' equity.....................    210,303    188,295    202,943    186,074    191,703    179,535     21,572
<FN>
- ------------------------------
(1)  Certain reclassifications have been made to previously reported amounts  to
     conform with current year presentation.
</TABLE>

                                       10
<PAGE>
QUARTERLY RESULTS OF OPERATIONS

    The  following table  presents certain  unaudited quarterly  information for
each of the Company's  last nine quarters. Quarterly  results of operations  are
not necessarily indicative of the results expected for the full year period. For
a  discussion  of  seasonality,  see "Management's  Discussion  and  Analysis of
Financial Condition and Operations -- Seasonality."

<TABLE>
<CAPTION>
                                                                  THREE MONTHS ENDED
                   -----------------------------------------------------------------------------------------------------------------
                   SEPTEMBER 30,  JUNE 30,  MARCH 31,  DECEMBER 31,  SEPTEMBER 30,  JUNE 30,  MARCH 31,  DECEMBER 31,  SEPTEMBER 30,
                       1994         1994      1994         1993          1993         1993      1993         1992          1992
                   -------------  --------  ---------  ------------  -------------  --------  ---------  ------------  -------------
                                                         (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                <C>            <C>       <C>        <C>           <C>            <C>       <C>        <C>           <C>
Revenues..........    $92,253     $92,432    $84,252     $79,104        $73,094     $75,728    $70,572     $70,452        $64,980
Cost of sales.....     60,739      60,637     56,142      53,491         49,674      53,547     50,059      51,035         48,043
                   -------------  --------  ---------  ------------  -------------  --------  ---------  ------------  -------------
  Gross profit....     31,514      31,795     28,110      25,613         23,420      22,181     20,513      19,417         16,937
Selling and
 administrative
 expense..........     18,486      18,402     17,465      16,791         16,350      16,182     15,827      15,502         15,126
Research and
 development
 expense..........      4,111       4,401      4,201       3,969          3,810       3,929      3,606       3,593          2,955
                   -------------  --------  ---------  ------------  -------------  --------  ---------  ------------  -------------
  Operating profit
   (loss).........      8,917       8,992      6,444       4,853          3,260       2,070      1,080         322         (1,144)
Other income
 (expense)
  Interest --
   net............       (912)       (910)    (1,161)       (794)          (760)       (698)      (574)       (445)          (533)
  Other -- net....       (179)       (341)      (218)       (297)          (194)       (432)      (180)     (1,674)          (389)
                   -------------  --------  ---------  ------------  -------------  --------  ---------  ------------  -------------
Income (loss)
 before income
 taxes............      7,826       7,741      5,065       3,762          2,306         940        326      (1,797)        (2,066)
Provision for
 income taxes.....      1,328       1,279        859         692            330         227        201         196           (188)
                   -------------  --------  ---------  ------------  -------------  --------  ---------  ------------  -------------
Net income
 (loss)...........    $ 6,498     $ 6,462    $ 4,206     $ 3,070        $ 1,976     $   713    $   125     $(1,993)       $(1,878)
                   -------------  --------  ---------  ------------  -------------  --------  ---------  ------------  -------------
                   -------------  --------  ---------  ------------  -------------  --------  ---------  ------------  -------------
Net income (loss)
 per share........    $  0.32     $  0.32    $  0.21     $  0.15        $  0.10     $  0.04    $  0.01     $ (0.10)       $ (0.09)
                   -------------  --------  ---------  ------------  -------------  --------  ---------  ------------  -------------
                   -------------  --------  ---------  ------------  -------------  --------  ---------  ------------  -------------
Average common and
 common equivalent
 shares
 outstanding......     20,596      20,476     20,477      20,398         20,360      20,315     20,299      19,982         19,968
                   -------------  --------  ---------  ------------  -------------  --------  ---------  ------------  -------------
                   -------------  --------  ---------  ------------  -------------  --------  ---------  ------------  -------------
</TABLE>

                                       11
<PAGE>
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS

RESULTS OF OPERATIONS

    The   following  table  sets  forth   certain  items  included  in  selected
consolidated financial data as a percentage of revenues.

<TABLE>
<CAPTION>
                                 THREE MONTHS ENDED
                                   SEPTEMBER 30,
                                    (UNAUDITED)         FISCAL YEARS ENDED JUNE 30,
                                 ------------------    -----------------------------
                                  1994       1993       1994       1993       1992
                                 -------    -------    -------    -------    -------
<S>                              <C>        <C>        <C>        <C>        <C>
Revenues......................     100.0%     100.0%     100.0%    100.0%     100.0 %
Cost of sales.................      65.8       68.0       66.9       71.9       70.2
                                 -------    -------    -------    -------    -------
Gross profit..................      34.2       32.0       33.1       28.1       29.8
Selling and administrative
 expense......................      20.1       22.3       21.0       22.2       22.1
Research and development
 expense......................       4.5        5.2        5.0        5.0        3.5
                                 -------    -------    -------    -------    -------
Operating profit..............       9.6        4.5        7.1        0.9        4.2
Interest expense, net.........      (1.0)      (1.0)      (1.1)      (0.8)      (0.6)
Other income (expense)........      (0.2)      (0.3)      (0.3)      (1.0)       0.4
                                 -------    -------    -------    -------    -------
Income (loss) before income
 taxes........................       8.4        3.2        5.7       (0.9)       4.0
Provision for income taxes....       1.4        0.5        0.9        0.2        0.5
                                 -------    -------    -------    -------    -------
Net income (loss).............       7.0%       2.7%       4.8%      (1.1)%      3.5%
                                 -------    -------    -------    -------    -------
                                 -------    -------    -------    -------    -------
</TABLE>

    THREE MONTHS ENDED SEPTEMBER 30, 1994 COMPARED WITH THE THREE MONTHS ENDED
SEPTEMBER 30, 1993

    Revenues for the three  months ended September 30,  1994 increased 26.2%  to
$92.3 million from $73.1 million in the prior year period. The Company's revenue
increase  reflected rising  demand for the  Company's power  MOSFETs and related
devices, which  resulted in  a 29%  increase in  revenues from  these  products.
Revenues  from the  thyristor and  rectifier product  lines increased  20% which
reflected unseasonally  strong demand  in Europe.  Changes in  foreign  exchange
rates  positively impacted revenues  by approximately $1.0  million. Revenues in
the current quarter included  $2.2 million of net  patent royalties compared  to
$2.4 million in the prior year period.

    Gross  profit for  the three  months ended September  30, 1994  was 34.2% of
revenues ($31.5 million) versus 32.0% of  revenues ($23.4 million) in the  prior
year  period. The  increased margin  reflected greater  manufacturing volume and
efficiencies in both the Company's growth and mature products.

    In the three  months ended  September 30, 1994,  selling and  administrative
expense  was 20.1% of  revenues ($18.5 million) versus  22.3% of revenues ($16.4
million) in  the  prior  year  period. The  decreased  percentage  reflects  the
Company's continued commitment to reducing operating expenses as a percentage of
revenues.

    In  the three  months ended September  30, 1994, the  Company's research and
development expenditures  increased  $0.3  million  to  $4.1  million  (4.5%  of
revenues)  from $3.8 million  (5.2% of revenues)  in the prior  year period. The
Company's research and development program was, and continues to be, focused  on
the advancement and diversification of the HEXFET product line, the expansion of
the  related IGBT products and the development of Control ICs and power products
that work in combination with HEXFETs and IGBTs to improve system performance.

    FISCAL YEAR 1994 COMPARED WITH FISCAL YEAR 1993

    The Company operates  on a  fiscal calendar  under which  the twelve  months
ended  July 3,  1994 consisted of  52 weeks compared  to 53 weeks  in the twelve
months ended July 4, 1993.

                                       12
<PAGE>
    Revenues for  fiscal 1994  increased  16.7% to  $328.9 million  from  $281.7
million  in the prior  year. The Company's  revenue increase reflected continued
growing demand  for  the  Company's  power MOSFETs  and  related  devices  which
resulted  in a 23.4%  increase in revenues from  these products. Offsetting this
revenue increase was a  6.2% decrease in revenues  from the Company's  thyristor
and  rectifier product lines. This downturn reflected slow starting economies in
key European markets in the first  half, and the planned consolidation of  these
mature  product  lines. Changes  in foreign  exchange rates  negatively impacted
revenues by approximately $2.0 million.  Revenues for fiscal 1994 also  included
$9.0  million of  net patent  royalties compared  to $9.5  million in  the prior
period.

    Gross profit was 33.1%  of revenues ($108.9 million)  in fiscal 1994  versus
28.1% of revenues ($79.0 million) in fiscal 1993. The increased margin reflected
IR's  recovery from production constraints in  fiscal 1993. In addition, greater
MOSFET manufacturing volume and efficiencies resulted in lower per unit  product
costs and enabled the Company to balance output to market demand and return to a
normal  mix of original equipment  manufacturers, distribution and higher margin
spot market business.

    In the fourth quarter of fiscal  1993 the Company extended the useful  lives
of certain assets. This change positively impacted gross profit by approximately
$2.6 million (0.8% of revenues) during fiscal 1994.

    In  fiscal 1994,  selling and administrative  expense was  21.0% of revenues
($69.0 million) versus  22.2% of revenues  ($62.6 million) in  fiscal 1993.  The
decreased  percentage reflects  the Company's  continued commitment  to reducing
operating expenses as a percentage of revenues.

    In  fiscal  1994,  the  Company's  research  and  development   expenditures
increased  $2.3 million to  $16.4 million (5.0% of  revenues) from $14.1 million
(5.0% of revenues) in the prior  period. The Company's research and  development
program was focused on the advancement and diversification of the HEXFET product
line,  the expansion of the related IGBT products and the development of Control
ICs and  power products  that work  in  combination with  HEXFETs and  IGBTs  to
improve  system performance. Included in  1994 research and development expenses
are the costs associated with efforts started in Japan in fiscal 1994 to  reduce
assembly costs and to develop new assembly processes.

    The  major components of other expense include a $0.9 million charge for the
consolidation of  the  Company's  power products  operations,  $0.4  million  of
severance  costs  and  $0.3  million  on the  disposal  of  property,  plant and
equipment, offset by $0.4 million in foreign currency transaction gains.

    FISCAL YEAR 1993 COMPARED WITH FISCAL YEAR 1992

    The Company operates on a fiscal calendar year under which the twelve months
ended July 4,  1993 consisted of  53 weeks compared  to 52 weeks  in the  twelve
months ended June 28, 1992.

    Revenues  for  fiscal  1993 increased  6.1%  to $281.7  million  from $265.5
million in the prior year. The Company's revenue increase was primarily a result
of higher sales of the Company's  power MOSFET devices and increased net  patent
royalties.  Changes in  foreign exchange  rates negatively  impacted revenues by
approximately $2.5 million. Revenues for  fiscal 1993 also include $9.5  million
of net patent royalties compared to $5.7 million in the prior period.

    During fiscal 1992 and the first three fiscal quarters of 1993, sales of the
Company's  power  MOSFET devices  were  constrained because  of  assembly output
limitations. In the second half of fiscal  1992, the Company began a program  to
expand  assembly  capacity  for power  MOSFETs  at HEXFET  America.  During this
expansion program a subcontractor that provided  assembly for up to 30% of  IR's
fastest-growing  product line  discontinued this  kind of  production. Delays in
receiving and ramping up equipment at HEXFET America were compounded by the need
to replace  the  subcontractor.  Product shortages  curtailed  IR's  growth  and
negatively affected its share of the power MOSFET market.

    Gross  profit was  28.1% of revenues  ($79.0 million) in  fiscal 1993 versus
29.8% of  revenues  ($79.1  million)  in fiscal  1992.  Margins  reflected  less
efficient  operation  during the  above assembly  expansion ramp-up  and product
allocation  that  favored   industry-leading  original  equipment   manufacturer
customers  over higher-margin spot  market business. Gross  profit for the first
half of fiscal 1993 was 26.8% of  revenues as compared to 29.2% of revenues  for
the  last half of fiscal  1993. First-half margins also  reflected a decrease in
wafer fabrication  rates  to  accommodate  a  lower  assembly  production  rate.
Second-half  margins reflected greater manufacturing volume and efficiencies and
an increase in net patent royalties.

                                       13
<PAGE>
    In fiscal 1993, selling and administrative expense increased $3.8 million to
$62.6 million (22.2% of revenues) from $58.8 million (22.1% of revenues) in  the
prior  period. These  increases reflect  planned revenue  increases, as  well as
increases associated with an  additional week of  operations reported in  fiscal
1993.

    In   fiscal  1993,  the  Company's  research  and  development  expenditures
increased $4.7 million  to $14.1 million  (5.0% of revenues)  from $9.4  million
(3.5%  of revenues) in the prior  period. The Company's research and development
program is focused on the advancement and diversification of the HEXFET  product
line  and expansion of the  related IGBT products. Efforts  are also directed to
the development of Control ICs and power products that work in combination  with
HEXFETs  and IGBTs to  improve system performance. The  increase in research and
development  expenditures  in  fiscal  1993  contributed  to  more  new  product
introductions in fiscal 1993.

    Other  expense included a $1.1 million charge for the settlement of a breach
of contract lawsuit, $1.1 million of severance costs and $0.2 million related to
the buyout of a lease upon early termination.

SEASONALITY

    The Company has experienced moderate  seasonality in its business in  recent
years.  On  average  over  the  past  three  years,  the  Company  has  reported
approximately 47% of annual  revenues in the  first half and  53% in the  second
half of its fiscal year.

LIQUIDITY AND CAPITAL RESOURCES

    At September 30, 1994, the Company had established $79.0 million in domestic
and  foreign  revolving  credit  facilities, of  which  $34.9  million  had been
borrowed by the Company.  Based upon covenant  and collateral limitations  under
the  revolving credit  facilities, the Company  had $23.9  million available for
borrowing at September 30, 1994. In addition, at September 30, 1994 the  Company
had  available $16.6  million of unused  lines of credit  for capital equipment,
$11.6 million of cash and cash equivalents and had made purchase commitments  of
approximately  $9.2  million for  capital  equipment. See  "Note  2 --  Notes to
Consolidated Financial Statements -- Long-Term Debt and Other Loans."

   
    The Company  intends to  spend approximately  $75.0 million  (of which  $4.9
million  has been spent through September  30, 1994) to expand wafer fabrication
capacity at  its  HEXFET America  facility,  most of  which  is expected  to  be
expended in fiscal 1995. In addition, the Company intends to spend approximately
$35.0  million (of which $10.2 million has  been spent in the three months ended
September 30, 1994)  to expand and  maintain assembly capacity,  to enhance  its
Management  Information  Systems  infrastructure and  to  maintain  its existing
facilities. The Company intends to fund these capital expenditures and meet  its
short-term  liquidity requirements  through cash  and cash  equivalents on hand,
anticipated cash flows  from operations,  funds available  from existing  credit
facilities  and  from funds  received from  the Offerings.  The Company  is also
negotiating  with  the  Industrial  Development  Authority  of  the  County   of
Riverside,  California for  an issuance of  $25.0 million  of taxable industrial
development bonds which  will be  indirectly backed  by the  U.S. Department  of
Housing  and  Urban Development.  The  proceeds will  be  loaned to  IR  for the
expansion at HEXFET America and will  be collateralized by the real property  at
HEXFET  America. However, there can  be no assurance that  any financing will be
available under cost-effective terms.
    

    Although the Company believes that the class action lawsuits brought against
the Company and its Board of Directors (See "Business -- Legal Proceedings") are
without merit, the ultimate outcome, and any effect on liquidity, thereof cannot
be presently determined. For  the possible effects  of environmental and  patent
matters  on liquidity, see "Business -- Environmental Matters," "-- Intellectual
Property" and "-- Legal Proceedings." The Company has not made any provision for
liability, if any, that may result upon adjudication of these matters.

INCOME TAXES

    Due in part to the utilization of net operating loss carryforwards ("NOLs"),
the Company's effective income tax rate for the three months ended September 30,
1994 and fiscal 1994 was approximately  17%. At September 30, 1994, the  Company
had  NOLs of approximately $23.5 million  for federal income tax purposes. These
NOLs expire beginning in 2004. The  Company also has approximately $5.3  million
of  tax credits available to offset future  U.S. taxes. In addition, the Company
anticipates that it  will be eligible  to receive California  state tax  credits
equal  to 6% of the cost of most of the Company's equipment purchased and placed
in service in California on  or after January 1, 1994.  When the NOLs and  other
available  tax credits  are fully  utilized, the  Company will  be subject  to a
normalized tax rate in the range of 35% to 40%.

                                       14
<PAGE>
                                    BUSINESS

    The Company  is a  major worldwide  supplier of  power semiconductors  which
convert  electricity at relatively  high voltage and  current levels in products
such  as  automobiles,  communications  equipment,  computers  and  peripherals,
consumer electronics and lighting, industrial equipment and office equipment.

    The Company designs, manufactures and markets power semiconductors which are
used  for  power conversion.  In the  same way  that oil  is refined  to produce
gasoline to power a car, electricity has to be converted to create useable power
to operate equipment.  This process of  power conversion can  be viewed in  four
stages:  input rectification, control, switching and output rectification. Input
rectification conditions off-line electricity, typically rectifying  alternating
current  to direct current.  The control function  measures incoming electricity
and sends a  signal to a  switch. A  switch packages the  current into  discrete
units.  Output rectification  reconfigures the  elements into  a form  usable by
electrically operated equipment.  The ability  of power  conversion products  to
minimize energy lost at each stage in the power conversion process is central to
their value.

    Because  IR supplies products that perform  each of the four basic functions
in power conversion, many circuits  use more than one  type of IR product.  This
allows IR to develop and package products that work together to optimize overall
circuit  performance  and  enables the  Company  to capitalize  more  broadly on
market-leading products.

                                    [CHART]

ILLUSTRATION DESCRIPTION:
Block diagram demonstrating sequence of four power conversion functions with
detail of associated processes and products.

    IR's products are used in all  major market sectors. Applications for  power
semiconductors  in  automobiles  include anti-lock  braking  and  fuel injection
systems, power  accessories and  air bags.  Communications applications  include
telephone  networks, satellites and modems. Computer and peripheral applications
include power  supplies and  disk  drives for  desktop, mainframe  and  portable
computers  and printers. Consumer electronics  and lighting applications include
home entertainment  equipment,  household appliances  and  fluorescent  lighting
ballasts.  Power semiconductors are also  used widely in industrial applications
such as  motor-driven  production  lines, instrumentation  and  test  equipment,
machine  tools, fork  lifts and  welders. Office  equipment applications include
copiers and facsimile machines.

    According to statistics for calendar 1993 published by the SIA, the  Company
had  a 17%  market share of  the $1.1  billion power MOS  transistor segment. In
addition, the Company sold approximately $19.1 million of power MOSFET and  IGBT
chips  and wafers  to third parties  in calendar 1993.  Accordingly, the Company
believes it is the  world leader in  the power MOS  transistor market. SIA  data
indicates  that industry-wide  sales of power  MOS transistors  in calendar 1993
increased 23% over 1992 levels,  and that, over the  past five years, power  MOS
transistor sales have grown at an average rate of 26% per year.

    The  Company's  major  customers  include  industry  leaders  such  as  AT&T
Technologies Inc., Conner Peripherals, Inc., General Motors Corporation, Hewlett
Packard  Co.,  International  Business   Machines  Corp.,  Matsushita   Electric
Industrial  Company, Ltd.,  Sanken Electric Company,  Ltd., Siemens  AG and Sony
Corporation. In fiscal  1994, over 50%  of the Company's  sales were to  foreign
customers, divided almost evenly between Europe and Asia, and the remainder were
to customers in North America.

                                       15
<PAGE>
POWER SEMICONDUCTOR INDUSTRY

    Semiconductors  are silicon-based chips that  conduct and block electricity.
The semiconductor industry consists principally of the integrated circuit ("IC")
and power semiconductor segments. Power semiconductors operate differently  from
ICs  that operate  at low  power levels  and process  and convey  information in
electronic form.  IC capability  is largely  defined by  circuit density,  which
increases  as  its  features  are miniaturized.  The  applications  for  ICs are
generally concentrated  in  the  computer  industry and  have  been  subject  to
frequent  redesign,  short  product life  cycles  and rapid  obsolescence.  As a
result, the demand for ICs has been highly cyclical.

    In contrast to ICs, power semiconductors operate at higher power levels  and
perform  a single function: they convert  electricity to operate a power supply,
control a motor  or light a  lamp. Their  capability is largely  defined by  the
level  of power that they can handle and their efficiency in converting electric
current into a more useful form. The amount of electric current handled and  the
heat generated limit the rate at which power semiconductors can be miniaturized.

    Advances    in   power   semiconductor    performance   and   decreases   in
cost-per-function have been achieved  through the use  of MOS technology.  Power
MOS transistors (power MOSFETs and IGBTs) have gained an increasing share of the
power  transistor market. Power MOS  transistors offer significant benefits over
bipolar  transistors,  which  are  power  semiconductors  that  also  serve  the
switching  function. Power MOS transistors provide much greater switching speed,
which allows the design  of higher frequency, more  compact circuits. Power  MOS
transistors  are activated by voltage rather  than current, so they require less
external circuitry to  operate, making  them more compatible  with IC  controls.
They also offer more reliable long-term performance and are more rugged, so they
can  better withstand adverse  operating conditions. In  addition, power MOSFETs
and IGBTs compare favorably to bipolar power transistors on a price/ performance
basis. The graph  below presents SIA  data on sales  of bipolar transistors  and
sales of power MOS transistors from calendar 1987 to 1993.

             SALES OF BIPOLAR TRANSISTORS AND POWER MOS TRANSISTORS

                                    [GRAPH]

GRAPH DESCRIPTION:
Area graph of SIA figures on worldwide bipolar and MOS power transistor sales in
dollars for calendar years 1987-1993.

EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC

<TABLE>
<CAPTION>
                            Power     Bipolar
<S>                       <C>        <C>
1987                         0.2        1.2
1988                         0.3        1.5
1989                         0.4        1.4
1990                         0.6        1.5
1991                         0.7        1.4
1992                         0.9        1.4
1993                         1.1        1.6
</TABLE>

APPLICATIONS

    Power  semiconductors  are  used  in  a  broad  spectrum  of  commercial and
industrial applications,  including many  products with  long life  cycles.  The
Company  believes that the demand for power semiconductors is less cyclical than
ICs,  given   power   semiconductors'   longer   product   lives   and   diverse

                                       16
<PAGE>
applications.  Power semiconductor demand is driven  by growth in their end-user
markets, replacement of bipolar transistors and proliferation of new end-product
applications. The Company believes that markets driving future demand for  power
semiconductors include:

    PORTABLE  ELECTRONICS.  Advances in power semiconductors help extend battery
life and reduce product size and weight in a variety of products such as  laptop
and  notebook  computers,  personal  digital  organizers,  cellular  telephones,
battery-operated appliances and hand tools.

    AUTOMOTIVE ELECTRONIC SYSTEMS.  The concentration of solid state electronics
in recent model year automobiles has increased rapidly with the proliferation of
safety and comfort features. Applications include anti-lock braking systems, air
bags, fuel injection systems, electric windows and adjustable mirrors and seats.
Adoption of  battery  operated  electric  vehicles  to  reduce  emissions  would
dramatically increase consumption of power MOS transistors.

    ELECTRONIC   LIGHTING  BALLASTS.     Electronic   lighting  ballasts,  which
incorporate power MOS  transistors, significantly  reduce the  amount of  energy
consumed in lighting. Conversion to electronic ballasts has been driven by lower
end-user  operating  costs, longer  product  life and  incentives  from electric
utilities to encourage energy efficiency.

   
    VARIABLE SPEED MOTORS.  Variable-speed, solid-state controls increase energy
efficiency and performance in a broad range of industrial and appliance  motors.
In  addition, clean air  legislation is driving  the conversion from traditional
chlorofluorocarbons  to  less   toxic  refrigerants   which  compromise   energy
efficiency.  Manufacturers of refrigerators and  air conditioners compensate for
these less efficient  chemicals by  using more  efficient variable-speed  motors
controlled by power semiconductors.
    

PRODUCTS

    The  Company's power MOS transistors  (principally power MOSFETs), chips and
wafers comprised over two-thirds of fiscal 1994 sales. IR also supplies  Control
ICs,  high  performance diodes  and high  power  rectifiers and  thyristors. The
Company believes that this complete line of power conversion products represents
a competitive advantage,  as IR  is able  to provide  customers with  integrated
solutions to their power conversion needs.

    The  Company's fastest-growing products have  comprised a greater proportion
of its total  revenues during each  of the  past three fiscal  years. The  table
below shows revenues of IR's growth and mature products in dollar amounts and as
a  percentage of revenues for the periods indicated. Dollar amounts in the table
below are in millions.

<TABLE>
<CAPTION>
                      THREE MONTHS ENDED SEPTEMBER 30,
                                 (UNAUDITED)                           FISCAL YEARS ENDED JUNE 30,
                      ---------------------------------   ------------------------------------------------------
                           1994              1993               1994               1993               1992
                      ---------------   ---------------   ----------------   ----------------   ----------------
<S>                   <C>    <C>        <C>    <C>        <C>     <C>        <C>     <C>        <C>     <C>
Growth (1)..........  $ 77.1   83.6%    $ 60.5   82.8%    $ 269.3   81.9%    $ 218.2   77.5%    $ 201.2   75.8%
Mature (2)..........    15.2   16.4       12.6   17.2        59.6   18.1        63.5   22.5        64.3   24.2
                      -----  --------   -----  --------   ------  --------   ------  --------   ------  --------
   Total............  $ 92.3  100.0%    $ 73.1  100.0%    $ 328.9  100.0%    $ 281.7  100.0%    $ 265.5  100.0%
                      -----  --------   -----  --------   ------  --------   ------  --------   ------  --------
                      -----  --------   -----  --------   ------  --------   ------  --------   ------  --------
<FN>
- ------------------------
(1)  Growth product revenues consist of revenues from HEXFETs, Schottky  diodes,
     Fast Recovery diodes, IGBTs, Control ICs and patent royalties.

(2)  Mature  product revenues consist of revenues from high power rectifiers and
     thyristors.
</TABLE>

    SWITCHING PRODUCTS

    Power MOS transistors (power MOSFETs and IGBTs) serve the switching function
in power conversion  to provide an  even, useable flow  of power for  electronic
equipment.

        POWER MOSFETS.  Through its HEXFET product line, the Company believes it
is  the world leader in  power MOSFETs. The breadth  and diversity of the market
for these products provide an element of stability in demand.

                                       17
<PAGE>
    Applications for  MOSFETs  in  automobiles include  anti-lock  brakes,  fuel
injection   systems,  power   accessories  and   air  bags.  Computer/peripheral
applications include power supplies, disk drives and printers. Office  equipment
applications  include  copiers  and  facsimile  machines.  Consumer  electronics
applications include home entertainment, videocameras, household appliances  and
power  tools. Lighting applications include  electronic fluorescent ballasts and
compact   fluorescent   bulbs.   Industrial   applications   include    welding,
instrumentation   and   test   equipment   and   automated   production   lines.
Communications applications include  telephone networks  and modems.  Government
and   aerospace  applications   include  commercial   and  military  satellites,
communications equipment, command-and-control systems and missiles.

    Market acceptance and brand recognition  of HEXFETs have benefited from  the
Company's  emphasis on quality control and reliability, and the Company believes
its standards to  be among the  most stringent in  the industry. Cumulative  and
current  data on  long and short-term  product reliability is  made available to
customers quarterly.

        IGBTS.   IGBTs are  particularly effective  in providing  the  switching
function  in  power  conversion  applications that  require  higher  current and
voltage. IGBTs combine the ease  of voltage-driven power MOSFET technology  with
the  conduction efficiency of bipolar transistor technology. The performance and
ruggedness of  these devices  enable  them to  replace bipolar  transistors  and
thyristors   in  many   high-voltage,  high-current  motor   control  and  power
conditioning applications. Energy-efficient,  variable-speed motor controls  are
an emerging application, and the Company believes electric vehicles will require
large  quantities of  IGBTs for each  vehicle. The Company's  IGBT technology is
closely related  to  its  HEXFET  technology, and  the  Company  views  them  as
complementary products.

    CONTROL PRODUCTS

    Control  ICs serve the  control function in  power conversion. These devices
perform the functions  of several discrete  components. This integration  allows
circuit  designers to simplify circuit  design and assembly, improve reliability
and reduce overall system  size and cost. In  sensing and responding to  adverse
operating  conditions,  Control  IC  performance  is  superior  to  a  safety or
diagnostic circuit  using discrete  components.  IR's Control  ICs draw  on  the
Company's  power  MOSFET technology  and are  designed to  operate at  very high
voltages and optimize the performance of both MOSFETs and IGBTs.

    Control ICs are used in  a wide variety of  power supply, motor control  and
lighting  applications. These  include industrial motor  controls, stepper motor
controls, solenoid drivers, welding  equipment, telecom switchers, computer  and
peripherals,  instrumentation and test  equipment, fluorescent lighting ballasts
and compact fluorescent light bulbs.

    INPUT RECTIFICATION PRODUCTS

    The Company  also  manufactures  a  broad line  of  rectifiers,  diodes  and
thyristors  that  serve the  input rectification  function in  power conversion.
These products convert power to make it more efficient and useable,  principally
in  industrial end products that require  power-handling capability from one amp
to 5,000 amps  and from  120 volts to  5,000 volts.  Applications include  motor
controls  and lighting, welding equipment,  fork lifts, machine tools, induction
heating, locomotives,  motor-driven  production lines,  smelting  equipment  and
power supplies.

    OUTPUT RECTIFICATION PRODUCTS

    The  Company's Schottky  diodes and  Fast Recovery  diodes serve  the output
rectification function in  power conversion.  Output rectification  reconfigures
electricity  into a  form useable  by electrically  operated equipment. Schottky
diodes are  used  with power  MOSFETs  in high-frequency  applications  such  as
computers  and peripherals.  The Company's trademarked  HEXFRED-R- Fast Recovery
diodes are used with IGBTs in higher current, lower frequency applications  such
as motor controls.

MANUFACTURING

    Semiconductor   manufacturing  involves  two  phases  of  production:  wafer
fabrication and  assembly (or  packaging). Wafer  fabrication is  a sequence  of
process  steps  that  exposes  silicon wafers  to  chemicals  that  change their
electrical properties. The chemicals are applied in sequences that create  cells
or circuits within

                                       18
<PAGE>
numerous  individual  devices (often  termed "die"  or  "chips") on  each wafer.
Packaging or assembly is the sequence of production steps that divide the  wafer
into  individual  chips and  enclose the  chips  in external  structures (termed
packages) that  make them  useable  in a  circuit. Wafer  fabrication  generally
employs process technology and equipment already proven in IC manufacturing.

    The  Company  has production  facilities in  California, England,  Italy and
Mexico. In  addition, the  Company  has equipment  at, or  manufacturing  supply
agreements  with,  assembly subcontractors  located  in the  United  States, the
Philippines, Japan, Taiwan and Malaysia. IR fabricates substantially all of  its
power  MOSFET  wafers  at  HEXFET  America  in  Temecula,  California.  A  wafer
fabrication facility  for IGBTs  and other  power MOSFET  devices, and  assembly
operations for government and other advanced products are located in El Segundo,
California.  Facilities  that assemble  HEXFETs  and other  growth  products are
located in  the United  States and  overseas, in  Company-owned and  subcontract
facilities, in order to take advantage of low assembly costs and provide maximum
customer  service.  In  Tijuana,  Mexico,  the  Company  assembles  power MOSFET
products, IGBTs and other modules. The Company's Oxted, England facility,  which
qualifies as a duty-free warehouse, assembles power MOSFETs and IGBTs as well as
products   used   in  certain   military   applications.  Since   completion  of
consolidation of its three input rectification manufacturing sites in the  third
quarter  of fiscal 1994, the Company has manufactured substantially all its high
power rectifiers and thyristors at its  Turin, Italy facility. In addition,  the
Company  has an assembly  facility for rectifiers and  thyristors in a duty-free
zone in India.

    To meet rising demand  for power MOS transistors,  the Company is  expanding
wafer fabrication capacity at HEXFET America. Planned to be in production by the
end  of  calendar 1995,  the  Company believes  that  the estimated  $75 million
expansion will ultimately increase HEXFET America's wafer capacity in power  MOS
transistors by about 75%. The expansion will position IR to aggressively address
the  fastest growing segments of the power transistor market, high density power
MOSFETs and IGBTs. Next-generation  devices designed for  production in the  new
fabrication   facility  incorporate  design  and  process  advancements  in  the
Company's proprietary HEXFET and IGBT technologies. The facility is designed  to
combine  the  flexibility of  manufacturing both  power  MOSFETs and  IGBTs with
efficient, high-volume  manufacturing techniques  that reduce  cycle times.  The
fabrication  will be performed on six-inch wafers and will use a continuous-flow
layout similar to  the one already  in use  at HEXFET America.  The facility  is
different  from the functional layout that the Company believes is commonly used
by other  semiconductor manufacturers.  Highly automated  processing and  supply
systems  for gases, water, and other  processing chemicals have also contributed
to continuous improvements in wafer yields  at this facility. Pilot runs of  the
new  products on the  specified equipment are already  underway at the Company's
facility in El Segundo, California.

    HEXFET America  was  selected  for the  fabrication  expansion  because  the
Company  believes it offers several important benefits. Expanding at an existing
facility should allow  the Company to  invest less in  construction and more  in
production capacity. It should require fewer additional employees than a totally
new  facility would and will  enable IR to start  up and operate the fabrication
with  experienced  staff  already  on  site.  The  Company  believes  that   the
accessibility  of HEXFET America to the Company's research and development staff
in El  Segundo has  eased  in the  past,  and should  ease  in the  future,  the
transition  of the products from development to manufacturing. See "Risk Factors
- -- Expansion Risks" and "-- Manufacturing Risks."

MARKETING, SALES AND DISTRIBUTION

    The Company markets  its products through  sales personnel,  representatives
and  distributors. The Company believes its ability to offer products that serve
each of the four functions of power conversion enhances its competitive position
in the overall power semiconductor market.

    In fiscal year 1994, more than half  of the Company's sales were to  foreign
customers, divided almost evenly between Europe and Asia, and the remainder were
to  customers in  North America.  The Company's  domestic direct  sales force is
organized in  four sales  zones.  In Europe,  the  Company's products  are  sold
through  its own sales force  as well as through  sales agents and distributors.
The Company has  European sales  and representative offices  in England,  Italy,
Sweden, France, Germany, Finland, Denmark, Poland, the

                                       19
<PAGE>
Czech  Republic and Hungary. In Asia, IR has sales and representative offices in
Japan, Singapore, Hong Kong, Korea and India. IR has well established, exclusive
relationships with agents and  representatives in most  major markets which  are
not   served  directly  by  IR  personnel.  See  "Risk  Factors  --  Significant
International Operations."

    Because many applications require products from several product groups,  the
Company  has  organized  its marketing  efforts  by market  sector,  rather than
product type. These business management  groups focus on several key  commercial
sectors  and on  government and aerospace  business. In  addition, the Company's
staff of applications  engineers provides  customers with  technical advice  and
support regarding the use of IR's products.

CUSTOMERS

   
    In  most cases,  the Company's  devices are  incorporated in  larger systems
manufactured by  end  product  manufacturers. The  Company's  customers  in  the
automotive  segment  include Robert  Bosch,  Ltd., Ford  Motor  Company, General
Motors Corporation,  NipponDenso Co.,  Ltd.,  and Siemens  AG. In  the  computer
segment,   IR's  customers   include  Apple  Computer,   Inc.,  Compaq  Computer
Corporation, Hewlett  Packard  Co.  and International  Business  Machines  Corp.
Consumer  electronics  customers include  Bose Corporation,  Philips Electronics
N.V. and Sony Corporation. Customers  in the telecommunications segment  include
AT&T  Technologies,  Inc. and  Nokia.  The Company  also  sells its  products to
distributors including Arrow Electronics, Inc. and Future Electronics, Inc.
    

BACKLOG

    As of September 30, 1994, the Company's backlog of orders was $132.5 million
compared to $85.6 million as of September 30, 1993 and $121.8 million as of June
30, 1994.  Backlog  represents purchase  orders  which have  been  released  for
shipment  and are  scheduled to  be shipped within  the following  12 months. In
accordance with  industry  practice, IR  may  in certain  circumstances  release
customers  from purchase  orders without penalty.  Increasingly, major customers
are operating their businesses with shorter lead times and are placing orders on
a periodic rather than an annual basis. Orders are cancelable and backlog is not
necessarily indicative of sales for any future period.

RESEARCH AND DEVELOPMENT

    The Company is involved in ongoing research and development directed  toward
new  processes, devices and packages as well as continued improvement of quality
and reliability in existing products. In  fiscal years 1994, 1993 and 1992,  the
Company  spent  approximately $16.4  million,  $14.1 million  and  $9.4 million,
respectively, on  research  and  development activities.  In  fiscal  1994,  the
Company   introduced  a   variety  of   products  designed   to  address  growth
opportunities identified by market sector: high-density, high-efficiency HEXFETs
and surface-mount packages  for portable electronics;  Control ICs for  lighting
and  motor control  applications; IGBT modules  for motor  controls; and HEXFETs
with diagnostic and  safety features  for auto applications.  IR's research  and
development  program is focused  on advancing and  diversifying the power MOSFET
product line, expanding the related IGBT products and developing Control ICs and
other power products that  work in combination with  power MOSFETs and IGBTs  to
improve  system performance. IR's research and development staff also works with
the marketing  staff to  develop  new products  that address  specific  customer
needs.  Efforts are  directed towards developing  new processes  that enable the
Company to produce smaller, more efficient devices. Efforts are also directed at
reducing  assembly  costs  and  developing  new  package  designs  and  assembly
processes.

INTELLECTUAL PROPERTY

    The  Company has made  significant investments in  developing and protecting
its intellectual property.  Through successful enforcement  of its patents,  the
Company  has  entered into  a number  of  license agreements,  generated royalty
income and  received  substantial  payments in  settlement  of  litigation.  The
Company currently has 61 U.S. patents and 37 U.S. patents pending. Those patents
fundamental  to  the  Company's  operations expire  between  2000  and  2010. In
addition, the Company has 67 foreign patents and 57 foreign patents pending in a
number of countries. IR is also licensed to use certain patents owned by others.
Under the terms  of an agreement  with Unitrode Corporation  that terminates  in
March 2000, the

                                       20
<PAGE>
Company  pays Unitrode Corporation approximately 12%  of IR's net patent royalty
income. The Company has several registered  trademarks in the United States  and
abroad   including  trademarks  for  HEXFET.   The  Company  believes  that  its
proprietary technology and intellectual  property contribute to its  competitive
advantage. See "Risk Factors -- Protection of Intellectual Property."

    Since  the  Company  believes  that its  power  MOSFET  patents  are broadly
applicable, it is committed to enforcing  its rights under those patents and  is
pursuing    additional   license   agreements.   The   Company   presently   has
royalty-bearing  license  agreements  with  11  companies:  Harris  Corporation;
Hitachi,   Ltd.;  Matsushita  Electronics  Corporation;  National  Semiconductor
Corporation;  NEC  Corporation;  Nihon  Inter  Electronics  Corporation;  Sanken
Electric   Company,   Ltd.;   SGS-Thomson   Microelectronics,   Inc.;  Siliconix
incorporated; Toshiba  Corporation; and  Unitrode Corporation.  In fiscal  1994,
$9.0  million  of  revenues  were  derived  from  such  royalty-bearing  license
agreements.

    Certain  of  the  Company's  fundamental  power  MOSFET  patents  have  been
subjected,  and continue to be subjected,  to reexamination in the United States
Patent and Trademark  Office ("PTO"). In  September 1994 the  PTO undertook  the
reexamination of U.S. patent 5,008,725, one of the Company's principal power MOS
transistor  patents. This patent has previously been confirmed on reexamination.
See "Note 9 -- Notes to Consolidated Financial Statements--Intellectual Property
Rights." Although no assurance can  be given as to  the ultimate outcome of  the
Company's  patent enforcement efforts, the  PTO reexamination proceedings or the
success of the Company's patent licensing program, the Company believes that its
patent portfolio will be the source of continuing royalty income.

COMPETITION

    The Company  encounters differing  degrees of  competition for  its  various
products,  depending upon  the nature of  the product and  the particular market
served. Generally, the semiconductor industry is highly competitive, and many of
the Company's competitors are larger companies with greater financial  resources
than  IR. The Company believes that its  breadth of product line and its ability
to bundle products that serve the different power conversion functions into  one
package distinguish it from its competitors. IR's products compete with products
manufactured by others based on quality, price, reliability, overall performance
of  the products,  breadth and  availability of  products, delivery  time to the
customer and service  (including technical  advice and  support). The  Company's
competitors include Eupec, Harris Corporation, Hitachi Ltd., Motorola, Inc., NEC
Corporation,  Philips International  B.V., Powerex,  Inc., Samsung Semiconductor
Inc., SGS-Thomson Microelectronics, Siemens AG, Siliconix incorporated,  Toshiba
Corporation and Westcode Semiconductors Ltd. See "Risk Factors -- Competition."

ENVIRONMENTAL MATTERS

    Federal,  state and local  laws and regulations  impose various restrictions
and controls on the discharge of certain materials, chemicals and gases used  in
semiconductor processing. The Company does not believe that compliance with such
laws  and  regulations will  have  a material  adverse  effect on  its financial
position.

    The  Company  and  Rachelle  Laboratories,  Inc.  ("Rachelle"),  its  former
pharmaceutical subsidiary which discontinued operations in 1986, have been named
among several hundred entities as potentially responsible parties ("PRPs") under
the  provisions of  the Comprehensive  Environmental Response,  Compensation and
Liability  Act  of  1980  ("CERCLA"),  in  connection  with  the  United  States
Environmental  Protection  Agency's  ("EPA") investigation  of  the  disposal of
allegedly hazardous  substances at  a  major superfund  site in  Monterey  Park,
California  (the "OII site").  Certain PRPs who settled  certain claims with the
EPA under consent  decrees filed suit  in Federal  Court in May  1992 against  a
number  of other  PRPs, including IR,  for cost recovery  and contribution under
CERCLA. The  lawsuit  against IR,  relating  to  the first  and  second  consent
decrees,  was settled in August 1993 for  the sum of $40,000 to avoid protracted
and expensive litigation. Claims have been made with the Company's insurers with
respect to the  OII site matter;  however, there  can be no  assurance that  the
insurance  coverage attaches  to these claims.  There remains  the potential for
litigation against IR and  Rachelle relating to the  OII site. The Company  does
not  believe that either it  or Rachelle is responsible  for the disposal at the
OII site  of  any  material  constituting  hazardous  substances  under  CERCLA.
Although the ultimate resolution of this matter is unknown, the Company believes
that it will not have a material adverse impact on its financial position.

                                       21
<PAGE>
    In  May 1993 the Company purchased property from its Employee Profit Sharing
and Retirement Plan. It  was determined that the  property required clean up  of
seepage  from a storage tank,  at an estimated additional  cost of $500,000. The
Company commenced the clean up in fiscal year 1994, and the costs to be incurred
will be capitalized as additional costs of the property.

    On July 18, 1994, the Company received a letter from the State of Washington
Department of Ecology  (the "Department")  notifying the Company  of a  proposed
finding  that the Company is a potentially liable person ("PLP") for alleged PCE
contamination (also known as  perchloroethylene, tetrachloroethylene, and  other
names) of real property and groundwater in Yakima County, Washington. The letter
alleges  that  the Company  arranged for  disposal  or treatment  of the  PCE or
arranged with a transporter for the disposal  or treatment of the PCE in  Yakima
County.  The Company replied by  a letter dated August  11, 1994 stating that it
has not contributed to PCE or  other solvent contamination at the Yakima  County
site and that it should not be designated a PLP. On October 11, 1994 the Company
received  a letter from the Department notifying the Company of its finding that
the Company is a PLP in the above matter.

    The Company received  a letter dated  September 9, 1994,  from the State  of
California  Department of Toxic Substances Control  stating that the Company may
be a PRP  for the deposit  of hazardous  substances at a  facility in  Whittier,
California.  The  Company's  investigation of  this  matter has  just  begun and
therefore an opinion cannot be expressed as to any ultimate responsibility.

LEGAL PROCEEDINGS

    The Company and  SGS-Thomson Microelectronics, Inc.  ("SGS") are engaged  in
various legal proceedings relating to their respective power MOSFET patents. SGS
filed  suit against the Company in June 1991 in Federal District Court in Texas,
charging infringement of U.S.  patent 4,553,314. On motion  by the Company,  the
suit  was transferred to the Federal  District Court in Los Angeles, California,
and thereafter SGS amended its complaint to charge infringement of U.S.  patents
4,495,513  and 4,712,127.  SGS alleges, in  substance, that  the Company's power
MOSFET and  IGBT products  infringe the  '314 patent,  that the  Company's  IGBT
products  infringe the '513  patent and that certain  packages for IR's products
(including  certain  power  MOSFET  packages)  infringe  the  '127  patent.  The
complaint,  as amended,  seeks unspecified actual  damages (but no  less than an
unspecified reasonable royalty) and an  injunction restraining further sales  of
such  products. On February  1, 1993, the District  Court dismissed SGS's claims
for infringement of the '127 and '513 patents for lack of standing and on  March
15,  1993 ruled  that the  SGS '314 patent  is unenforceable  due to inequitable
conduct. SGS appealed these rulings, as well as the order transferring the  case
to   California,  to  the   Court  of  Appeals  for   the  Federal  Circuit.  IR
cross-appealed a separate ruling by the  District Court denying IR's motion  for
summary  judgment that  the '314  patent is invalid.  In July  1994, the Federal
Circuit reversed the District Court's grants of summary judgment as to the '513,
'127 and '314 patents  and affirmed the District  Court's denial of IR's  motion
for  summary  judgment of  invalidity of  the '314  patent. The  Federal Circuit
ordered, however, that  the case should  proceed in California.  Cross-petitions
for  writs of  certiorari are pending  before the  U.S. Supreme Court  as to the
jurisdictional and venue rulings of the  Federal Circuit. No trial date has  yet
been  set and the  ultimate outcome of the  case as to the  three SGS patents is
unknown.

    In separate proceedings before the same California District Court, IR sought
enforcement of a prior license agreement between  IR and SGS. The Court in  July
1994  granted the Company's  motions to enforce the  license agreement with SGS,
requiring SGS to pay additional past  and prospective royalties under IR's  U.S.
patents  4,959,699 and 4,642,666 on SGS's sales  of power MOSFET, IGBT and power
IC products. SGS has  filed a separate  appeal of this  ruling with the  Federal
Circuit.

    The  Company has  also filed  a separate action  in the  same District Court
against SGS  and its  Italian affiliate,  SGS-Thomson Microelectronics,  S.r.l.,
seeking  an  injunction  against  infringement  of  the  Company's  U.S. patents
5,008,725 and 5,130,767. Trial of the Company's action has been set for  January
25, 1995.

    The  Company,  its  directors  and  certain  officers  have  been  named  as
defendants in three class action lawsuits filed in federal court in  California.
These  suits seek unspecified but  substantial compensatory and punitive damages
for alleged intentional and negligent  misrepresentations and violations of  the
federal

                                       22
<PAGE>
securities  laws. The complaints generally allege that the Company and the other
defendants made materially false statements  or omitted to state material  facts
in  connection with the public offering  of the Company's common stock completed
in April 1991 and the redemption and conversion in June 1991 of the Company's 9%
Convertible  Subordinated  Debentures  Due  2010.  They  also  allege  that  the
Company's  projections  for growth  in fiscal  1992 were  materially misleading.
Although the Company believes that the  claims alleged in the suits are  without
merit,  the  ultimate  outcome  cannot be  presently  determined.  A substantial
judgment or settlement,  if any,  could have a  material adverse  effect on  the
Company's financial condition and results of operations. Two of these suits also
name Kidder, Peabody & Co. Incorporated and Montgomery Securities as defendants.

    No  provision for any  liability that may result  upon adjudication of these
matters has been made in the consolidated financial statements.

EMPLOYEES

    As of September 30, 1994,  the Company employed approximately 3,150  people,
of  whom approximately 2,140 are employed in North America, 960 in Europe and 50
in Asia. The Company is not a party to any collective bargaining agreements. The
Company considers its relations with its employees to be good.

PROPERTIES

    The Company's  operations occupy  a total  of approximately  864,000  square
feet,  of which approximately 477,000 square  feet are located within the United
States. Of the worldwide total, approximately 247,000 square feet are leased and
the balance is owned by the Company.

    IR's leases expire between 1995 and 2012. If the Company is unable to  renew
these  leases upon  expiration, it  believes that  it could  find other suitable
premises without any material adverse impact on its operations.

    The Company's major facilities are in the following locations:

<TABLE>
<CAPTION>
                                               TOTAL SQUARE FEET
                                            -----------------------
FACILITY                                      OWNED       LEASED             EXPIRATION OF LEASE
- ------------------------------------------  ---------  ------------  -----------------------------------
<S>                                         <C>        <C>           <C>
Temecula, California......................    287,000         --                     --
El Segundo, California....................     93,000     91,000     July 31, 1995 - July 31, 2004
Tijuana, Mexico...........................         --     89,000     (1)
Oxted, England............................     45,000     15,000     March 27, 2012
Turin, Italy..............................    110,000      6,000     June 30, 1995 - March 31, 1998
<FN>
- ------------------------
(1)  Since the Company's lease  on its assembly facility  in Mexico expired,  it
     has rented the same space on a month to month basis due to pending rezoning
     of  the neighborhood. The Company has identified comparable space available
     for lease on comparable terms if such assembly facility needs to be moved.
</TABLE>

    The Company believes that these facilities are adequate for its current  and
anticipated  near term operating needs. IR  estimates that it currently utilizes
approximately 81% of its worldwide manufacturing capacity. To meet rising demand
for power MOS transistors, the Company is expanding wafer fabrication at  HEXFET
America.  Planned to be in  production by the end  of calendar 1995, the Company
believes that  the  estimated $75  million  expansion will  ultimately  increase
HEXFET America's wafer fabrication capacity by about 75%.

    The Company has nine sales offices located throughout the United States, and
other sales and technical support offices in Canada, France, Germany, Hong Kong,
India, China, Singapore, and Scandinavia that operate in leased facilities.

                                       23
<PAGE>
                                   MANAGEMENT

    The executive officers and directors of IR are:

<TABLE>
<CAPTION>
NAME                              AGE      TITLE
- ----------------------------      ---      ----------------------------------------------------------
<S>                           <C>          <C>
Eric Lidow                            81   President; Chairman of the Board; Chief Executive Officer
Alexander Lidow                       39   Executive Vice President - Operations; Director
Derek B. Lidow                        41   Executive Vice President; Director
Robert J. Mueller                     65   Executive Vice President - External Affairs and Business
                                            Development; Director
Michael P. McGee                      35   Vice President - Chief Financial Officer
Donald S. Burns                       69   Director
George Krsek                          73   Director
James D. Plummer                      49   Director
Jack O. Vance                         69   Director
Rochus E. Vogt                        64   Director
</TABLE>

    Eric  Lidow is  a founder of  the Company  and has been  the Chief Executive
Officer and a director of the Company since its inception in 1947.

    Alexander Lidow, Ph.D.,  has been  employed by  the Company  since 1977.  He
served as the Semiconductor Division's Vice President - Research and Development
since July 1979, was promoted to Semiconductor Division Executive Vice President
- -Manufacturing  and Technology  in March 1985,  and became the  President of the
Electronic Products Division in July 1989. In August 1992, Dr. Lidow was elected
Executive Vice President of Operations. He  was elected a director in  September
1994. Dr. Lidow is a son of Eric Lidow.

    Derek  B. Lidow,  Ph.D., has  been employed  by the  Company since  1976. He
served as the Semiconductor Division's  Vice President - Operations since  March
1980,  was  promoted  to  Semiconductor  Division  Executive  Vice  President  -
Marketing and Administration in  March 1985, and became  President of the  Power
Products  Division in July 1989. In August 1992, Dr. Lidow was elected Executive
Vice President and in July 1993 assumed responsibilities for worldwide sales and
marketing. He was elected a  director in September 1994. Dr.  Lidow is a son  of
Eric Lidow.

    Robert  J. Mueller has been employed by  the Company since November 1961. He
served as Vice President of Marketing  for the U.S. Semiconductor Division  from
1963  until October  1969 when  he was  promoted to  Corporate Vice  President -
Foreign  Operations.  Mr.  Mueller  became  Executive  Vice  President  -  World
Marketing  and  Foreign  Operations  in  April  1978,  Corporate  Executive Vice
President - External Affairs and Worldwide Sales in July 1989, and in July  1993
became  Executive Vice President - External Affairs and Business Development. He
was elected a director in 1990.

    Michael P. McGee has been employed by the Company since 1990. He joined  the
Company  in July 1990  as Director of  Corporate Accounting and  was promoted to
Corporate  Controller  in  December  1990.  Mr.  McGee  became  Vice  President,
Controller  and Principal Accounting  Officer in 1991, and  in 1993, became Vice
President - Chief Financial Officer. From 1985 until he joined the Company,  Mr.
McGee was a senior manager and audit manager at Ernst & Young.

    Donald  S. Burns has been Chairman, President and Chief Executive Officer of
Prestige Holdings, Ltd.,  a property  management and  business consulting  firm,
since  1978. Mr. Burns was elected a director of the Company in 1993. He is also
a director of ESI Corporation and International Technology Corporation.

    George Krsek, Ph.D., was President of Houba, Inc. a pharmaceutical firm from
1975 to July  1994, and  is currently President  of Konec  L.L.C., a  management
consulting company. He has been a director of the Company since 1979.

    James  D. Plummer, Ph.D., has been the John M. Fluke Professor of Electrical
Engineering,  Stanford  University  since   1988  and  Director  of   Stanford's
Integrated Circuits Laboratory since 1984. Dr. Plummer was elected a director of
the Company in September 1994.

                                       24
<PAGE>
    Jack  O.  Vance  became  the Managing  Director  of  Management  Research, a
management consulting firm, in  November 1990. From 1960  through 1989 he was  a
director of McKinsey & Co., Inc., a management consulting firm. During the years
1973  through 1989 he was  also the Managing Director  of the firm's Los Angeles
office. He has been a director of the Company since 1988. He is also a  director
of  Hillhaven  Corporation,  International Technology  Corporation,  Escorp, The
Olson Company, University Restaurant Group, and FCG Enterprises, Inc.

    Rochus E. Vogt, Ph.D.,  is a Professor of  Physics, California Institute  of
Technology,  and acted as Provost from 1983 through 1987. He has been a director
of the Company since 1984.

                          DESCRIPTION OF CAPITAL STOCK

    The authorized capital stock of the Company consists of 30,000,000 shares of
Common Stock,  $1.00 par  value per  share, and  1,000,000 shares  of  Preferred
Stock, $1.00 par value per share. No shares of Preferred Stock are outstanding.

COMMON STOCK
    Each  holder of Common Stock is entitled to  one vote for each share held of
record on  each matter  submitted to  a  vote of  shareholders. Subject  to  the
current prohibition in the Company's loan agreements on the payment of dividends
and  to preferences which may be granted to the holders of Preferred Stock, each
holder of  Common  Stock  is  entitled to  share  ratably  in  distributions  to
shareholders  and to receive  ratably such dividends  as may be  declared by the
Board of Directors out of funds legally available therefore and, in the event of
the liquidation, dissolution or winding up of the Company, is entitled to  share
ratably  in all  assets of the  Company remaining after  payment of liabilities.
Holders of  Common Stock  have  no conversion,  preemptive  or other  rights  to
subscribe  for additional shares, and there  are no redemption rights or sinking
fund provisions with respect to the Common Stock.

    The Transfer Agent  and Registrar  for the  Common Stock  is Chemical  Trust
Company of California, Los Angeles, California.

PREFERRED STOCK
    The  Board of  Directors, without  further action  by the  holders of Common
Stock, may issue shares of Preferred Stock in one or more series and may fix  or
alter the rights, preferences, privileges and restrictions, including the voting
rights,  redemption  provisions  (including sinking  fund  provisions), dividend
rights, dividend rates, liquidation preferences  and conversion rights, and  the
description  of and number of shares  constituting any wholly unissued series of
Preferred Stock. The Board of  Directors, without further shareholder  approval,
can  issue  Preferred  Stock  with  voting  and  conversion  rights  which could
adversely affect the voting power of the  holders of Common Stock. No shares  of
Preferred Stock presently are outstanding, and the Company has no plans to issue
shares  of  Preferred Stock.  The issuance  of shares  of Preferred  Stock under
certain circumstances could have the effect  of delaying or preventing a  change
of control or other corporate action.

CHARTER AND BYLAW PROVISIONS
    In  addition to the authorized Preferred  Stock, certain other provisions of
the Company's Certificate of Incorporation and Bylaws may make it more difficult
for a third party to acquire, or may discourage a third party from attempting to
acquire, control of the Company.

    In accordance  with provisions  contained in  the Company's  Certificate  of
Incorporation  and its Bylaws, the Company's  Board of Directors is divided into
three classes with staggered three year terms for each class. The Certificate of
Incorporation and Bylaws provide that the  directors have the right to  increase
(with certain restrictions) or decrease the number of directors. The Certificate
of  Incorporation provides that vacancies for newly created directorships may be
filled by a majority vote of the  remaining directors and removal for cause  may
only be made by the vote of a majority of the outstanding shares.

    Amendment of any of the foregoing provisions of the Company's Certificate of
Incorporation  requires the approval of  the holders of at  least 66 2/3% of the
stock of the Company issued and outstanding having voting power, given at a duly
convened stockholders meeting upon a proposal adopted by the Board.

                                       25
<PAGE>
    Under the Company's Bylaws, a special meeting of stockholders may be  called
only by certain officers or a majority of the Board.

LIMITATION ON DIRECTOR LIABILITY
    In accordance with Section 102(b)(7) of the Delaware General Corporation Law
(the  "DGCL"), the  Company's Certificate  of Incorporation  limits a director's
liability to the Company or its stockholders for monetary damages for breach  of
fiduciary duty to the fullest extent permitted by the DGCL. Section 102(b)(7) of
the  DGCL enables a corporation in its certificate of incorporation to eliminate
or limit  the  personal  liability of  a  director  to the  corporation  or  its
stockholders  for monetary  damages for  violations of  the director's fiduciary
duty, except that a corporation  may not eliminate or  limit the liability of  a
director (i) for any breach of the director's duty of loyalty to the corporation
or  its stockholders,  (ii) for  acts or  omissions not  in good  faith or which
involve intentional misconduct or a knowing violation of law, (iii) pursuant  to
Section  174  of the  DGCL (providing  for liability  of directors  for unlawful
payment of dividends or unlawful stock purchases or redemptions) or (iv) for any
transaction from which the director derived an improper personal benefit.

SECTION 203 OF THE DELAWARE GENERAL CORPORATION LAW
    Section 203 of the DGCL prevents  a Delaware corporation from engaging in  a
"Business  Combination" (defined to include a variety of transactions, including
mergers, as set forth below) with an "Interested Stockholder" (generally defined
as a person with 15%  or more of a  corporation's outstanding voting stock)  for
three  years following  the date  such person  became an  Interested Stockholder
unless: (i) before such  person became an Interested  Stockholder, the board  of
directors  of the  corporation approved either  the Business  Combination or the
transaction  in   which  the   Interested  Stockholder   became  an   Interested
Stockholder;   (ii)  upon   consummation  of  the   transaction  the  Interested
Stockholder  owned  at  least  85%  of  the  voting  stock  of  the  corporation
outstanding  at  the time  the transaction  commenced  (excluding stock  held by
directors who are  also officers  and employee  stock ownership  plans in  which
employee  participants do not have the right to determine confidentially whether
shares subject to the plan will be  tendered in a tender or exchange offer);  or
(iii)  on or subsequent  to the date  on which such  person became an Interested
Stockholder, the Business Combination is (x) approved by the board of  directors
of  the  corporation and  (y) authorized  at  a meeting  of stockholders  by the
affirmative vote of  at least 66  2/3% of  the outstanding voting  stock of  the
corporation not owned by the Interested Stockholder.

    Under  Section 203,  the restrictions described  above apply  to the Company
unless, among other things,  (i) by the  affirmative vote of  a majority of  the
shares  entitled  to  vote,  it  adopts  an  amendment  to  its  certificate  of
incorporation or bylaws expressly  electing not to be  governed by Section  203,
(such an amendment would not be effective until 12 months after its adoption and
would not apply to certain Business Combinations); or (ii) a class of its voting
stock  is not (x) listed  on a national securities  exchange, (y) authorized for
quotation  on  an  inter-dealer  quotation  system  of  a  registered   national
securities  association or (z)  held of record by  more than 2,000 stockholders,
(unless any of the foregoing results from action taken, directly or  indirectly,
by  an Interested Stockholder or from a transaction in which a person becomes an
Interested Stockholder).

    A Business  Combination  is  defined in  Section  203  as (i)  a  merger  or
consolidation,  (ii) any sale, lease, mortgage, transfer or other disposition of
assets having an aggregate market value of  10% or more of the aggregate  market
value of either all assets of the corporation determined on a consolidated basis
or all outstanding stock of the corporation; (iii) any transaction which results
in  the  issuance  or  transfer  by  the  corporation,  or  by  certain  of  its
subsidiaries, of any of its stock to the Interested Stockholder, except pursuant
to (x)  the exercise,  exchange  or conversion  of securities  exercisable  for,
exchangeable  for or convertible into stock of the corporation or any subsidiary
which were outstanding prior  to the time the  stockholder became an  Interested
Stockholder  or (y) a transaction  which effects a pro  rata distribution to all
stockholders of the corporation; (iv) any transaction involving the  corporation
or  certain  subsidiaries  thereof  which  has  the  effect  of  increasing  the
proportionate share  of  the  stock  of  any  class  or  series,  or  securities
convertible  into the stock  of any class  or series, of  the corporation or any
such subsidiary  which  is  owned  directly  or  indirectly  by  the  Interested
Stockholder  (except as a  result of immaterial changes  due to fractional share
adjustments  or  any  purchase  or  redemption  not  caused  by  the  Interested
Stockholder);  or (v) any receipt by  the Interested Stockholder of the benefit,
directly  or  indirectly,  (except  proportionately  as  a  stockholder  of  the
corporation)  of any loans, advances or  other financial benefits provided by or
through the corporation.

                                       26
<PAGE>
                                  UNDERWRITING

    Under the  terms of  and subject  to the  conditions contained  in the  U.S.
Underwriting  Agreement,  the  form of  which  is  filed as  an  exhibit  to the
Registration Statement of which this  Prospectus forms a part, the  underwriters
of  the offering of the Shares in the  United States and Canada named below (the
"U.S. Underwriters")  for  whom Lehman  Brothers  Inc., Kidder,  Peabody  &  Co.
Incorporated,  Montgomery Securities, PaineWebber  Incorporated and Smith Barney
Inc. are  acting  as  representatives (the  "Representatives"),  have  severally
agreed  to purchase from the Company, and the Company has agreed to sell to each
U.S. Underwriter, the aggregate number of Shares set forth opposite the name  of
each such U.S. Underwriter below:

<TABLE>
<CAPTION>
                                                              NUMBER OF
U.S. UNDERWRITERS                                              SHARES
- ------------------------------------------------------------  ---------
<S>                                                           <C>
Lehman Brothers Inc.........................................
Kidder, Peabody & Co. Incorporated..........................
Montgomery Securities.......................................
PaineWebber Incorporated....................................
Smith Barney Inc............................................
                                                              ---------
    Total...................................................  3,600,000
                                                              ---------
                                                              ---------
</TABLE>

    Under  the  terms  of  and  subject  to  the  conditions  contained  in  the
International Underwriting Agreement, the form of  which is filed as an  exhibit
to  the Registration Statement of which this  Prospectus is a part, the managers
of the concurrent offering  of the Shares outside  the United States and  Canada
(the  "International  Managers" and  together  with the  U.S.  Underwriters, the
"Underwriters") for whom Lehman Brothers International (Europe), Kidder, Peabody
International PLC, Montgomery Securities, PaineWebber International (U.K.)  Ltd.
and  Smith Barney Inc. are  acting as lead managers  (the "Lead Managers"), have
severally agreed to  purchase from the  Company, and the  Company has agreed  to
sell  to each  International Manager, the  aggregate number of  Shares set forth
opposite the name of each such International Manager below:

<TABLE>
<CAPTION>
                                                              NUMBER OF
INTERNATIONAL MANAGERS                                         SHARES
- ------------------------------------------------------------  ---------
<S>                                                           <C>
Lehman Brothers International (Europe)......................
Kidder, Peabody International PLC...........................
Montgomery Securities.......................................
PaineWebber International (U.K.) Ltd........................
Smith Barney Inc............................................
                                                              ---------
    Total...................................................    900,000
                                                              ---------
                                                              ---------
</TABLE>

    The  Company  has  been   advised  that  the   U.S.  Underwriters  and   the
International Managers, respectively, propose to offer part of the Shares to the
public  at the public offering price set forth on the cover page hereof and part
to certain dealers  at a price  that represents  a concession not  in excess  of
$       per share under the public offering price. The U.S. Underwriters and the
International Managers may allow, and such dealers may reallow, a concession not
in  excess of $        per share to  certain other brokers or dealers. After the
initial offering to the public, the  offering price and other selling terms  may
be changed by the U.S. Underwriters and International Managers.

    The U.S. Underwriting Agreement and the International Underwriting Agreement
(collectively,  the "Underwriting  Agreements") provide that  the obligations of
the several U.S.  Underwriters and  the International  Managers to  pay for  and
accept  delivery of the shares of Common Stock offered pursuant to the Offerings
are subject to  certain conditions  contained therein, and  that if  any of  the
foregoing shares of Common Stock are purchased by the U.S. Underwriters pursuant
to  the U.S. Underwriting Agreement or by the International Managers pursuant to
the International Underwriting Agreement, all the shares of Common Stock  agreed
to  be purchased by either the  U.S. Underwriters or the International Managers,
as the case may be, pursuant  to their respective Underwriting Agreements,  must
be so purchased. The closing

                                       27
<PAGE>
under  the International  Underwriting Agreement is  a condition  to the closing
under  the  U.S.  Underwriting  Agreement,  and  the  closing  under  the   U.S.
Underwriting  Agreement is  a condition to  the closing  under the International
Underwriting Agreement.

    The Company  has granted  to  the U.S.  Underwriters and  the  International
Managers  an option to purchase up to  an aggregate of 675,000 additional shares
of Common Stock at the price to public less the underwriting discount, solely to
cover over-allotments, if any. Such option may be exercised at any time up to 30
days after the date of this Prospectus. To the extent that the U.S. Underwriters
or International Managers exercise such option, each of the U.S. Underwriters or
the International Managers, as  the case may be,  will be committed, subject  to
certain conditions, to purchase a number of Common Stock shares proportionate to
such  U.S.  Underwriter's  or  International  Manager's  initial  commitment  as
indicated in the preceding tables.

    The U.S. Underwriters and  the International Managers  have entered into  an
Agreement  Between U.S. Underwriters and  International Managers (the "Agreement
Between U.S. Underwriters and International  Managers"), pursuant to which  each
U.S.  Underwriter has  agreed that,  as part of  the distribution  of the Shares
(plus any of the shares to cover over-allotments) offered in the U.S.  Offering,
(i)  it is not purchasing any such Shares for the account of anyone other than a
U.S. Person (as defined below) and (ii) it has not offered or sold, and will not
offer, sell,  resell or  deliver, directly  or indirectly,  any of  such  Shares
outside  the United States or  Canada or to anyone other  than a U.S. Person. In
addition, pursuant  to such  agreement, each  International Manager  has  agreed
that, as part of the distribution of the Shares (plus any of the shares to cover
over-allotments) offered in the International Offering, (i) it is not purchasing
any  such Shares for the account of a U.S. Person and (ii) it has not offered or
sold, and will not offer, sell,  resell or deliver, directly or indirectly,  any
of  such Shares  in the  United States  or Canada  or to  any U.S.  Person. Each
International Manager has also agreed that it will offer to sell shares only  in
compliance with all relevant requirements of any applicable laws.

    The  foregoing limitations do not apply  to stabilization transactions or to
certain other  transactions specified  in the  Underwriting Agreements  and  the
Agreement  Between U.S.  Underwriters and International  Managers, including (i)
certain purchases and sales between the U.S. Underwriters and the  International
Managers, (ii) certain offers, sales, resales, deliveries or distributions to or
through  investment advisors or other  persons exercising investment discretion,
(iii) purchases, offers or sales by a U.S. Underwriter who is also acting as  an
International  Manager or by  an International Manager  who is also  acting as a
U.S. Underwriter and (iv) other  transactions specifically approved by the  U.S.
Underwriters  and International Managers.  As used herein,  (a) the term "United
States" means the United States of America (including District of Columbia)  and
its  territories, its possessions  and other areas  subject to its jurisdiction,
and (b) the  term "U.S.  Person" means  any resident  or citizen  of the  United
States,  any corporation, partnership or other entity created or organized in or
under the laws of the United States or  any estate or trust the income of  which
is  subject to  United States  income taxation regardless  of the  source of its
income (other than  the foreign  branch of any  U.S. Person),  and includes  any
United States branch of a person other than a U.S. Person.

    Pursuant  to  the  Agreement  Between  U.S.  Underwriters  and International
Managers, sales may be made between the U.S. Underwriters and the  International
Managers  of such  number of shares  of Common  Stock as may  be mutually agreed
upon. The price of any  shares sold shall be the  public offering price then  in
effect  for Shares  being sold  by the  U.S. Underwriters  and the International
Managers, less  the selling  concession unless  otherwise determined  by  mutual
agreement.  To the extent that there are sales between the U.S. Underwriters and
the International Managers pursuant to  the Agreement Between U.S.  Underwriters
and International Managers, the number of shares initially available for sale by
the  U.S. Underwriters or by the International Managers may be more or less than
the amount appearing on the cover page of this Prospectus.

    Each International Manager has  represented and agreed that  (i) it has  not
offered  or sold, and will not offer or sell, in the United Kingdom, by means of
any document, any Shares other than (a) to persons whose ordinary business it is
to buy or sell shares or debentures, whether as principal or agent, or (b) under

                                       28
<PAGE>
circumstances which do not constitute an offer to the public within the  meaning
of  the  Companies Act  1985;  (ii) it  has complied  and  will comply  with all
applicable provisions of the Financial Services  Act 1986 (the "1986 Act")  with
respect  to anything done by it in relation  to the Shares in, from or otherwise
involving the United Kingdom;  and (iii) it  has only issued  or passed on,  and
will  only issue or pass on to any  person in the United Kingdom, any investment
advertisement (within the  meaning of the  1986 Act) relating  to the Shares  if
that  person  falls  within Article  9(3)  of  the Financial  Services  Act 1986
(Investment Advertisements) (exemptions) Order 1988.

    No action has been taken or will be taken in any jurisdiction by the Company
or the International Managers that would permit a public offering of the  shares
offered  pursuant to  the Offerings  in any  jurisdiction where  action for that
purpose is required, other than the United States. Persons into whose possession
this Prospectus comes are required by the Company and the International Managers
to inform themselves about and to observe any restrictions as to the offering of
the shares  offered pursuant  to  the Offerings  and  the distribution  of  this
Prospectus.

    Purchasers  of the shares of Common Stock  offered hereby may be required to
pay stamp taxes and other charges in  accordance with the laws and practices  of
the country of purchase in addition to the offering price set forth on the cover
page hereof.

    The  Company and each of Alexander, Derek  and Eric Lidow have agreed not to
sell or dispose of any shares of Common Stock, with certain exceptions, prior to
the expiration of 90  days from the  date of this  Prospectus without the  prior
written consent of the U.S. Underwriters and International Managers. The Company
has agreed to indemnify the U.S. Underwriters and International Managers against
certain  liabilities,  including liabilities  under the  Securities Act,  and to
contribute to payments that the U.S. Underwriters and the International Managers
may be required to make in respect hereof.

                                 LEGAL OPINIONS

    The validity of the Common Stock to be issued pursuant to the Offerings  and
general corporate legal matters will be passed upon for the Company by O'Melveny
& Myers and for the U.S. Underwriters and the International Managers by Latham &
Watkins.

                                    EXPERTS

    The  audited consolidated  financial statements  of the  Company included in
this prospectus,  have been  audited by  Coopers &  Lybrand L.L.P.,  independent
public  accountants, as indicated in their  report with respect thereto, and are
included herein  in reliance  upon  such report,  which include  an  explanatory
paragraph  regarding  three outstanding  class action  lawsuits, given  upon the
authority of said firm as experts in auditing and accounting.

                             AVAILABLE INFORMATION

    The Company is subject to  the informational requirements of the  Securities
Exchange  Act  of  1934, as  amended  (the  "Exchange Act")  and,  in accordance
therewith, files reports and other information with the Securities and  Exchange
Commission  (the "Commission"). Reports, proxy  statements and other information
filed by  the  Company may  be  inspected and  copied  at the  public  reference
facilities  maintained by the Commission at  450 Fifth Street, N.W., Washington,
D.C. 20549, as well as  at the following Regional  Offices of the Commission:  7
World  Trade Center, Suite 1300,  New York, New York  10048 and Citicorp Center,
500 West Madison  Street, Suite 1400,  Chicago, Illinois 60661.  Copies of  such
material  may be obtained from the Public Reference Section of the Commission at
450 Fifth  Street,  N.W., Washington,  D.C.  20549, at  prescribed  rates.  Such
material may also be inspected at the offices of the New York Stock Exchange and
the Pacific Stock Exchange.

    This  Prospectus constitutes a part of a Registration Statement filed by the
Company with the Commission under the  Securities Act of 1933, as amended.  This
Prospectus  omits  certain  of  the information  contained  in  the Registration
Statement, and  reference  is hereby  made  to the  Registration  Statement  and

                                       29
<PAGE>
related  exhibits for  further information with  respect to the  Company and the
Common Stock. Any statements contained  herein concerning the provisions of  any
document  are not necessarily complete, and, in each instance, reference is made
to the copy of such document filed  as an exhibit to the Registration  Statement
or  otherwise filed with the Commission. Each such statement is qualified in its
entirety by such reference.

                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

   
    The following  documents, which  have been  filed by  the Company  with  the
Commission pursuant to the Exchange Act, are hereby incorporated by reference in
this Prospectus:
    

   
        (i)  the Company's Annual Report on Form  10-K for the fiscal year ended
    June 30, 1994; and
    

   
        (ii) the Company's Quarterly Report on  Form 10-Q for the quarter  ended
    September 30, 1994.
    

    All  documents filed by the Company pursuant to Sections 13(a), 13(c), 14 or
15(d) of the Exchange Act subsequent to the date of this Prospectus and prior to
the termination  of  these offerings  shall  be  deemed to  be  incorporated  by
reference into this Prospectus and to be a part hereof from the respective dates
of filing of such documents.

    Any statement contained in a document incorporated by reference herein shall
be  deemed to be modified  or superseded for purposes  of this Prospectus to the
extent that a  statement contained  herein or  in any  other subsequently  filed
document  which also is incorporated by  reference herein modifies or supersedes
such statement.  Any such  statement  so modified  or  superseded shall  not  be
deemed,  except  as so  modified or  superseded,  to constitute  a part  of this
Prospectus.

    The Company  will  provide  without  charge to  each  person  to  whom  this
Prospectus  is delivered, upon oral or written request,  a copy of any or all of
the foregoing  documents  incorporated  herein  by  reference,  except  for  the
exhibits  to such documents (unless  such exhibits are specifically incorporated
by reference  into  information  that  this  Prospectus  incorporates).  Written
requests  should be directed to  International Rectifier Corporation, 233 Kansas
Street, El Segundo, California 90245, Attention: Corporate Secretary.  Telephone
requests should be directed to (310) 322-3331.

                                       30
<PAGE>
                                    GLOSSARY

    The  following  are  definitions  of certain  technical  terms  used  in the
Prospectus:

    ASSEMBLY -- The  process of encasing  a semiconductor chip  in a package  to
produce a finished product.

    BIPOLAR TRANSISTOR -- A transistor that is controlled by electrical current.

   
    CONTROL  IC -- A semiconductor  device having logic and  control on the same
chip that is used in conjunction with power MOSFETs or IGBTs.
    

    DIODE -- A discrete device which conducts current in one direction.

    DISCRETE DEVICE --  An electrical  or electronic component  that performs  a
single function.

    FAST  RECOVERY DIODE -- A diode suited to applications above 200 volts where
high switching speed is desirable.

    FET (FIELD  EFFECT  TRANSISTOR)  --  A  transistor  that  is  controlled  by
electrical voltage.

    IGBT  (INSULATED GATE BIPOLAR  TRANSISTOR) -- A variant  of the power MOSFET
that incorporates bipolar transistor technology.

    IC (INTEGRATED CIRCUIT) -- A device  that contains multiple components on  a
single silicon chip to form an electronic circuit.

    PACKAGE -- The external structure that encases a semiconductor chip.

    POWER  MOSFET -- A power field  effect transistor (FET) that is manufactured
using MOS (Metal Oxide Semiconductor) processing technology similar to that used
in manufacturing certain  integrated circuits. The  Company's power MOSFETs  are
sold under the trademark HEXFET.

    POWER  SEMICONDUCTOR -- A  silicon-based component that  operates at a power
level above approximately one watt  and has the ability  both to conduct and  to
block  the flow of electricity. Power semiconductors are used to switch (turn on
and off)  electricity or  to condition  electricity, for  example by  converting
alternating current to direct current.

    RECTIFIER -- A diode used to convert alternating current to direct current.

    SCHOTTKY  DIODE  --  An  ultra-fast  rectifier  for  use  in high-frequency,
low-voltage circuits.

    THYRISTOR (SCR)  --  A four  layer  semiconductor  device that  has  a  gate
structure allowing current to flow in an electrical circuit.

    TRANSISTOR  -- A  semiconductor device that  switches (turns on  and off) or
amplifies electricity in a circuit.

    WAFER FABRICATION --  The sequence  of semiconductor  processing steps  that
creates semiconductor devices on a silicon wafer.

                                       31
<PAGE>
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

<TABLE>
<CAPTION>
                                                                                                               PAGE
                                                                                                             ---------
<S>                                                                                                          <C>
Report of Independent Accountants..........................................................................        F-2
Consolidated Statement of Operations for the fiscal years ended June 30, 1994, 1993, and 1992 and the three
 month periods ended September 30, 1994 and 1993 (unaudited)...............................................        F-3
Consolidated Balance Sheet as of June 30, 1994 and 1993 and as of September 30, 1994 (unaudited)...........        F-4
Consolidated Statement of Stockholders' Equity for the fiscal years ended June 30, 1994, 1993, and 1992 and
 for the three month period ended September 30, 1994 (unaudited)...........................................        F-5
Consolidated Statement of Cash Flows for the fiscal years ended June 30, 1994, 1993, and 1992 and for the
 three month periods ended September 30, 1994 and 1993 (unaudited).........................................        F-6
Notes to Consolidated Financial Statements.................................................................        F-7
</TABLE>

                                      F-1
<PAGE>
                       REPORT OF INDEPENDENT ACCOUNTANTS

The Shareholders and Board of Directors
International Rectifier Corporation

    We  have  audited  the  accompanying  consolidated  financial  statements of
International Rectifier Corporation  and Subsidiaries  as of June  30, 1994  and
1993,  and  for the  fiscal  years ended  June 30,  1994,  1993 and  1992. These
financial statements are  the responsibility  of the  Company's management.  Our
responsibility  is to express an opinion  on these financial statements based on
our audits.

    We conducted  our  audits in  accordance  with generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence  supporting
the  amounts and disclosures in the financial statements. An audit also includes
assessing the  accounting  principles used  and  significant estimates  made  by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

    In our opinion, the financial  statements referred to above present  fairly,
in  all material respects, the  consolidated financial position of International
Rectifier Corporation  and Subsidiaries  at  June 30,  1994  and 1993,  and  the
consolidated  results of  their operations and  their cash flows  for the fiscal
years ended June 30, 1994, 1993 and 1992, in conformity with generally  accepted
accounting principles.

    As   discussed  in  Note  10  to  the  accompanying  consolidated  financial
statements, three class action lawsuits have been filed against the Company  and
its  Board of Directors  (two of whom  are also officers).  The ultimate outcome
thereof cannot  presently  be determined.  Accordingly,  no provisions  for  any
liability  that may result upon  adjudication of these matters  has been made in
the accompanying consolidated financial statements.

COOPERS & LYBRAND

Los Angeles, California
July 26, 1994

                                      F-2
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
                      CONSOLIDATED STATEMENT OF OPERATIONS
                      (IN 000'S EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                          THREE MONTHS ENDED
                                                            SEPTEMBER 30,
                                                             (UNAUDITED)          FISCAL YEARS ENDED JUNE 30,
                                                         --------------------  ----------------------------------
                                                           1994       1993        1994        1993        1992
                                                         ---------  ---------  ----------  ----------  ----------
<S>                                                      <C>        <C>        <C>         <C>         <C>
Revenues...............................................  $  92,253  $  73,094  $  328,882  $  281,732  $  265,495
Cost of sales..........................................     60,739     49,674     219,944     202,684     186,437
                                                         ---------  ---------  ----------  ----------  ----------
  Gross profit.........................................     31,514     23,420     108,938      79,048      79,058
Selling and administrative expense.....................     18,486     16,350      69,008      62,637      58,771
Research and development expense.......................      4,111      3,810      16,381      14,083       9,405
                                                         ---------  ---------  ----------  ----------  ----------
  Operating profit.....................................      8,917      3,260      23,549       2,328      10,882

Other income (expense):
  Interest expense, net................................       (912)      (760)     (3,625)     (2,250)     (1,436)
  Other, net...........................................       (179)      (194)     (1,050)     (2,675)      1,066
                                                         ---------  ---------  ----------  ----------  ----------
Income (loss) before income taxes......................      7,826      2,306      18,874      (2,597)     10,512
Provision for income taxes (Note 5)....................      1,328        330       3,160         436       1,275
                                                         ---------  ---------  ----------  ----------  ----------
Net income (loss)......................................  $   6,498  $   1,976  $   15,714  $   (3,033) $    9,237
                                                         ---------  ---------  ----------  ----------  ----------
                                                         ---------  ---------  ----------  ----------  ----------
Net income (loss) per share............................      $0.32      $0.10       $0.78      $(0.15)      $0.46
                                                            ------     ------     -------     -------     -------
                                                            ------     ------     -------     -------     -------
Average common and common equivalent shares
 outstanding...........................................     20,596     20,360      20,428      20,087      20,107
                                                          ------     ------     -------     -------     -------
                                                          ------     ------     -------     -------     -------
</TABLE>

         The accompanying notes are an integral part of this statement.

                                      F-3
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
                           CONSOLIDATED BALANCE SHEET
                        (IN 000'S EXCEPT SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                                            SEPTEMBER 30,
                                                                                1994        JUNE 30,    JUNE 30,
                                                                             (UNAUDITED)      1994        1993
                                                                            -------------  ----------  ----------
<S>                                                                         <C>            <C>         <C>
                                                     ASSETS
Current assets:
  Cash and cash equivalents...............................................   $    11,610   $   13,051  $    8,545
  Trade accounts receivable, less allowance for doubtful accounts
   ($677 in 1994 and $607 in 1993)........................................        76,071       67,595      55,004
  Inventories.............................................................        75,288       73,429      62,609
  Prepaid expenses........................................................         2,542        2,779       1,731
                                                                            -------------  ----------  ----------
    Total current assets..................................................       165,511      156,854     127,889
Property, plant and equipment, at cost, less accumulated depreciation
 ($112,411 in 1994 and $98,250 in 1993)...................................       167,542      158,567     138,518
Investments and long-term notes receivable................................         2,236        2,248       2,251
Other assets..............................................................        13,200       12,905       9,790
                                                                            -------------  ----------  ----------
    Total assets..........................................................   $   348,489   $  330,574  $  278,448
                                                                            -------------  ----------  ----------
                                                                            -------------  ----------  ----------

                                      LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Bank loans (Note 2).....................................................   $    34,853   $   27,205  $   24,007
  Long-term debt, due within one year (Note 2)............................         6,614        6,105       3,532
  Accounts payable........................................................        38,549       36,965      27,846
  Accrued salaries, wages and commissions.................................         8,959       10,264       9,376
  Other accrued expenses..................................................         9,648        9,150       5,012
                                                                            -------------  ----------  ----------
    Total current liabilities.............................................        98,623       89,689      69,773
Long-term debt, less current maturities (Note 2)..........................        28,605       26,817      11,810
Deferred income...........................................................         1,103        1,199       1,402
Other long-term liabilities...............................................         9,238        9,320       9,073
Deferred income taxes (Note 5)............................................           617          606         316
Commitments and contingencies (Notes 7, 8, 9, 10, and 11)
Stockholders' equity (Note 3):
  Common shares, $1 par value, authorized: 30,000,000; issued and
   outstanding: 20,352,277 shares in 1994 and 20,233,802 shares in 1993...        20,392       20,352      20,234
  Preferred shares, $1 par value, authorized: 1,000,000; issued and
   outstanding: none in 1994 and 1993.....................................            --           --          --
  Capital contributed in excess of par value of shares....................       168,508      168,078     167,148
  Retained earnings.......................................................        25,998       19,500       3,786
  Cumulative translation adjustments......................................        (4,595)      (4,987)     (5,094)
                                                                            -------------  ----------  ----------
    Total stockholders' equity............................................       210,303      202,943     186,074
                                                                            -------------  ----------  ----------
    Total liabilities and stockholders' equity............................   $   348,489   $  330,574  $  278,448
                                                                            -------------  ----------  ----------
                                                                            -------------  ----------  ----------
</TABLE>

         The accompanying notes are an integral part of this statement.

                                      F-4
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
                 CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY
                        (IN 000'S EXCEPT SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                               CAPITAL
                                                             CONTRIBUTED
                                                              IN EXCESS
                                                                 OF        RETAINED   CUMULATIVE
                                                    COMMON    PAR VALUE    EARNINGS   TRANSLATION
                                                    SHARES    OF SHARES    (DEFICIT)  ADJUSTMENTS    TOTAL
                                                    -------  -----------   --------   -----------   --------
<S>                                                 <C>      <C>           <C>        <C>           <C>
BALANCE, JUNE 30, 1991............................  $19,810   $164,938     $ (2,418)    $(2,795)    $179,535
Issuance of common shares:
  30,916 -- exercise of stock options.............       31        159           --          --          190
  48,956 -- stock purchase plan...................       49        489           --          --          538
  40,000 -- profit sharing contribution...........       40        184           --          --          224
Stock offering costs..............................       --       (203)          --          --         (203)
Net income for the year ended June 30, 1992.......       --         --        9,237          --        9,237
Cumulative translation adjustments................       --         --           --       2,182        2,182
                                                    -------  -----------   --------   -----------   --------
BALANCE, JUNE 30, 1992............................   19,930    165,567        6,819        (613)     191,703
Issuance of common shares:
  204,640 -- exercise of stock options............      205        992           --          --        1,197
  99,027 -- stock purchase plan...................       99        589           --          --          688
Net loss for the year ended June 30, 1993.........       --         --       (3,033)         --       (3,033)
Cumulative translation adjustments................       --         --           --      (4,481)      (4,481)
                                                    -------  -----------   --------   -----------   --------
BALANCE, JUNE 30, 1993............................   20,234    167,148        3,786      (5,094)     186,074
Issuance of common shares:
  49,410 -- exercise of stock options.............       49        276           --          --          325
  69,065 -- stock purchase plan...................       69        654           --          --          723
Net income for the year ended June 30, 1994.......       --         --       15,714          --       15,714
Cumulative translation adjustments................       --         --           --         107          107
                                                    -------  -----------   --------   -----------   --------
BALANCE, JUNE 30, 1994............................   20,352    168,078       19,500      (4,987)     202,943
Issuance of common shares:
  5,500 -- exercise of stock options..............        5         54           --          --           59
  34,546 -- stock purchase plan...................       35        376           --          --          411
Net income for the three months ended September
 30, 1994.........................................       --         --        6,498          --        6,498
Cumulative translation adjustments................       --         --           --         392          392
                                                    -------  -----------   --------   -----------   --------
BALANCE, SEPTEMBER 30, 1994 (UNAUDITED)...........  $20,392   $168,508     $ 25,998     $(4,595)    $210,303
                                                    -------  -----------   --------   -----------   --------
                                                    -------  -----------   --------   -----------   --------
</TABLE>

         The accompanying notes are an integral part of this statement.

                                      F-5
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
                      CONSOLIDATED STATEMENT OF CASH FLOWS
                                   (IN 000'S)

<TABLE>
<CAPTION>
                                                          THREE MONTHS ENDED
                                                            SEPTEMBER 30,
                                                             (UNAUDITED)           FISCAL YEARS ENDED JUNE 30,
                                                        ----------------------  ----------------------------------
                                                           1994        1993        1994        1993        1992
                                                        ----------  ----------  ----------  ----------  ----------
<S>                                                     <C>         <C>         <C>         <C>         <C>
Cash flow from operating activities:
  Net income (loss)...................................  $    6,498  $    1,976  $   15,714  $   (3,033) $    9,237
  Adjustment to reconcile net income (loss) to net
   cash provided by operating activities:
    Depreciation and amortization.....................       5,365       4,214      18,018      16,524      16,597
    Stock contribution to employee benefit plan.......          --          --          --          --         224
    Deferred income...................................         (95)       (126)       (203)       (513)       (496)
    Deferred income taxes.............................          --         (78)        272        (159)       (248)
    Deferred compensation.............................         165         470       1,473       1,529         978
                                                        ----------  ----------  ----------  ----------  ----------
  Cash flow from operating activities prior to working
   capital requirements...............................      11,933       6,456      35,274      14,348      26,292
  Change in working capital (Note 1)..................      (8,749)     (3,591)     (9,109)      3,943     (19,760)
                                                        ----------  ----------  ----------  ----------  ----------
Net cash provided by operating activities.............       3,184       2,865      26,165      18,291       6,532
                                                        ----------  ----------  ----------  ----------  ----------
Cash flow from investing activities:
  Additions to property, plant and equipment..........     (13,267)     (5,825)    (24,686)    (16,994)    (32,069)
  Investment in other noncurrent assets...............        (709)       (256)     (4,979)     (4,158)     (3,233)
                                                        ----------  ----------  ----------  ----------  ----------
Net cash used in investing activities.................     (13,976)     (6,081)    (29,665)    (21,152)    (35,302)
                                                        ----------  ----------  ----------  ----------  ----------
Cash flow from financing activities:
  Proceeds from issuance of short-term bank debt,
   net................................................       7,403       3,007       2,623       5,333      14,490
  Proceeds from issuance of long-term debt............       3,098       3,038      10,326       2,038       1,734
  Payments on long-term debt and obligations under
   capital leases.....................................      (1,208)       (992)     (5,809)     (5,268)     (7,606)
  Net proceeds from issuance of common stock..........         470         509       1,048       1,885         525
  Other...............................................        (459)       (150)       (125)     (1,201)      4,085
                                                        ----------  ----------  ----------  ----------  ----------
Net cash provided by financing activities.............       9,304       5,412       8,063       2,787      13,228
                                                        ----------  ----------  ----------  ----------  ----------
Effect of exchange rate changes on cash and cash
 equivalents..........................................          47          39         (57)         72        (192)
                                                        ----------  ----------  ----------  ----------  ----------
Net increase (decrease) in cash and cash
 equivalents..........................................      (1,441)      2,235       4,506          (2)    (15,734)
Cash and cash equivalents beginning of year...........      13,051       8,545       8,545       8,547      24,281
                                                        ----------  ----------  ----------  ----------  ----------
Cash and cash equivalents end of year.................  $   11,610  $   10,780  $   13,051  $    8,545  $    8,547
                                                        ----------  ----------  ----------  ----------  ----------
                                                        ----------  ----------  ----------  ----------  ----------
</TABLE>

         The accompanying notes are an integral part of this statement.

                                      F-6
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

    PRINCIPLES OF CONSOLIDATION

    The  consolidated financial statements  include the accounts  of the Company
and all its  majority-owned subsidiaries  which are located  in Europe,  Mexico,
Canada, the Far East and South East Asia. All material intercompany transactions
have been eliminated.

    BASIS OF PRESENTATION FOR INTERIM FINANCIALS

    The   consolidated  financial  statements  included  herein  are  unaudited,
however, they contain  all normal recurring  accruals which, in  the opinion  of
management,  are necessary to present fairly the consolidated financial position
of the Company at September 30, 1994 and the consolidated results of  operations
and cash flows for the three month periods ended September 30, 1994 and 1993. It
should  be understood that  accounting measurements at  interim dates inherently
involve greater  reliance  on  estimates  than  at  year  end.  The  results  of
operations  for  the  three  month  period  ended  September  30,  1994  are not
necessarily indicative of the results to be expected for the full year.

    FISCAL YEAR

    Fiscal years 1994 and 1992  consist of 52 weeks ending  July 3 and June  28,
respectively.  Fiscal  year  1993  consists  of  53  weeks  ending  July  4. For
convenience, all references  herein to fiscal  years are to  fiscal years  ended
June 30.

    REVENUE RECOGNITION

    The  Company recognizes revenues from product  sales at the time of shipment
except on certain government contracts  where revenues are recognized using  the
percentage of completion method.

    INVENTORIES

    Inventories   are  stated  at  the  lower  of  cost  (principally  first-in,
first-out) or market. Inventories at June 30, 1994 and 1993, and for the  period
ended September 30, 1994 (unaudited), were comprised of the following (000's):

<TABLE>
<CAPTION>
                                                                                     FISCAL YEARS ENDED
                                                                                          JUNE 30,
                                                               THREE MONTHS ENDED   --------------------
                                                               SEPTEMBER 30, 1994     1994       1993
                                                               -------------------  ---------  ---------
<S>                                                            <C>                  <C>        <C>
Raw materials................................................       $  15,579       $  15,118  $  12,613
Work-in-process..............................................          29,734          26,965     24,943
Finished goods...............................................          29,975          31,346     25,053
                                                                      -------       ---------  ---------
                                                                    $  75,288       $  73,429  $  62,609
                                                                      -------       ---------  ---------
                                                                      -------       ---------  ---------
</TABLE>

    PROPERTY, PLANT AND EQUIPMENT

    Property,  plant and equipment  is stated at cost.  Upon retirement or other
disposal, the asset cost and  related accumulated depreciation are removed  from
the  accounts  and  any gain  or  loss  on disposition  is  included  in income.
Depreciation is provided  on the  straight-line method, based  on the  estimated
useful  lives of the  assets, or the  units of production  method based upon the
estimated output of the  equipment. In the fourth  quarter of fiscal year  1993,
the  Company extended the estimated useful  lives of certain assets. This change
positively impacted 1994 and  1993 pre-tax results  by $2,600,000 and  $200,000,
respectively.

                                      F-7
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
Depreciation  expense for the fiscal  years ended June 30,  1994, 1993, and 1992
was $15,880,000, $14,160,000, and $15,358,000, respectively. Property, plant and
equipment at June 30, 1994 and 1993 was comprised of the following (000's):

<TABLE>
<CAPTION>
                                                                                   1994         1993
                                                                                -----------  -----------
<S>                                                                             <C>          <C>
Buildings and improvements....................................................  $    72,004  $    71,859
Equipment.....................................................................      169,988      140,651
Construction in progress......................................................       22,525       17,795
Less accumulated depreciation.................................................     (112,411)     (98,250)
                                                                                -----------  -----------
                                                                                    152,106      132,055
Land..........................................................................        6,461        6,463
                                                                                -----------  -----------
                                                                                $   158,567  $   138,518
                                                                                -----------  -----------
                                                                                -----------  -----------
</TABLE>

    Depreciation  of  improvements  to  leased  premises  is  provided  on   the
straight-line  method over  the shorter  of the remaining  term of  the lease or
estimated useful lives of the improvements. Capital leases included in property,
plant and equipment at June 30, 1994 and 1993 are as follows (000's):

<TABLE>
<CAPTION>
                                                                                     1994        1993
                                                                                  ----------  ----------
<S>                                                                               <C>         <C>
Equipment.......................................................................  $   62,533  $   51,305
Less accumulated depreciation...................................................     (35,171)    (31,800)
                                                                                  ----------  ----------
                                                                                  $   27,362  $   19,505
                                                                                  ----------  ----------
                                                                                  ----------  ----------
</TABLE>

    FOREIGN CURRENCY TRANSLATION

    The financial position  and results  of operation of  the Company's  foreign
subsidiaries  are measured using the local  currency as the functional currency.
Foreign assets  and liabilities  in  the consolidated  balance sheet  have  been
translated  at the  rate of  exchange on  the balance  sheet date.  Revenues and
expenses are translated at  the average exchange rate  for the year.  Unrealized
translation adjustments do not affect the results of operations and are reported
as  a separate component of stockholders' equity. In fiscal 1994, 1993 and 1992,
the Company recognized foreign currency transaction gains of $376,000, $129,000,
and $376,000, respectively.

    RESEARCH AND DEVELOPMENT

    Research and development costs are expensed as incurred.

    INCOME TAXES

    Deferred income taxes  are determined  based on the  difference between  the
financial  reporting and tax bases of assets and liabilities using enacted rates
in effect during  the year  in which the  differences are  expected to  reverse.
Valuation  allowances  are established  when  necessary to  reduce  deferred tax
assets to the  amount expected to  be realized.  Income tax expense  is the  tax
payable  for the period and the change  during the period in deferred tax assets
and liabilities.

    U.S. income taxes  have not  been provided on  approximately $14,260,000  of
undistributed  earnings of foreign subsidiaries since management considers these
earnings to  be invested  indefinitely or  substantially offset  by foreign  tax
credits.

    EARNINGS PER SHARE

    Earnings  per share is computed by dividing earnings by the weighted average
number of  common  and  common  stock  equivalents  outstanding.  Stock  options
outstanding under stock option plans are considered

                                      F-8
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

1.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
common  stock equivalents. Common stock equivalents for stock options of 112,700
and 244,200 were utilized in the computation  of earnings per share in 1994  and
1992,  respectively. No common stock equivalents  for stock options were used in
1993 as the impact would have been anti-dilutive.

    INTANGIBLE ASSETS

    Patent costs are amortized using the  straight-line method over the life  of
the patent.

    STATEMENT OF CASH FLOWS

    The  Company invests  excess cash from  operations in  short term investment
grade  money  market  funds.  The  Company  considers  all  highly  liquid  debt
instruments  purchased with an original  maturity of three months  or less to be
cash equivalents. Components in the changes in working capital are comprised  of
the following (000's):

<TABLE>
<CAPTION>
                                                                              FISCAL YEARS ENDED
                                                                                   JUNE 30,
                                                  THREE MONTHS ENDED   ---------------------------------
                                                  SEPTEMBER 30, 1994      1994       1993        1992
                                                  -------------------  ----------  ---------  ----------
<S>                                               <C>                  <C>         <C>        <C>
                                                      (UNAUDITED)

Trade accounts receivable, net..................       $  (8,070)      $  (11,701) $  (2,871) $   (8,386)
Inventories.....................................          (1,515)         (10,427)     3,390     (19,333)
Prepaid expenses................................             257           (1,031)      (789)        796
Accounts payable................................           1,431            9,123      4,316       4,710
Accrued salaries, wages and commissions.........          (1,356)             918        243       1,686
Other accrued expenses..........................             504            4,009       (346)        767
                                                         -------       ----------  ---------  ----------
                                                       $  (8,749)      $   (9,109) $   3,943  $  (19,760)
                                                         -------       ----------  ---------  ----------
                                                         -------       ----------  ---------  ----------
</TABLE>

    Supplemental disclosures of cash flow information (000's):

<TABLE>
<CAPTION>
                                                                              1994       1993       1992
                                                                            ---------  ---------  ---------
<S>                                                                         <C>        <C>        <C>
Cash paid during the year for:
  Interest................................................................  $   3,612  $   3,246  $   3,877
  Income taxes............................................................        802      1,376      1,416
Interest capitalized......................................................        453      1,357      1,736
Non cash financing activity:
  Assets acquired through capital leases..................................     12,675      4,275      2,576
</TABLE>

    Included  in assets acquired through capital  leases in 1994 is $7.2 million
in existing operating leases that were renegotiated to capital leases.

    CONCENTRATION OF RISK

    The Company places its temporary  cash investments with high credit  quality
financial  institutions. At times, such investments  may be in excess of insured
limits.

    The Company performs periodic credit evaluations of its customers' financial
condition and generally does not  require collateral. Receivables generally  are
due  in  60  days.  Credit losses  have  consistently  been  within management's
expectations.

    RECLASSIFICATION

    Certain reclassifications have been made  to previously reported amounts  to
conform with the current year presentation.

                                      F-9
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

2.  LONG-TERM DEBT AND OTHER LOANS
    In  June 1994,  the Company  renewed and  modified its  existing $20 million
unsecured credit facility  from Sanwa  Bank California  ("Sanwa Facility").  The
modified facility increases the revolving line of credit to $25 million. In June
1994  the  Company also  added  an unsecured  revolving  credit facility  of $10
million from Wells Fargo Bank. Interest  rates on both facilities are at  prime,
or  the banks costs of  funds plus 1.25%, or LIBOR  plus 1.25% (at the Company's
option). Both facilities expire on October 31, 1996, contain the same  financial
covenants  and ratios, which impact the  availability of funds, and prohibit the
Company from  paying  cash  dividends.  At  June  30,  1994,  $2.5  million  was
outstanding  under  the Sanwa  Facility.  The Company  also  has a  $3.0 million
uncommitted domestic credit facility  of which $1.0  million was outstanding  at
June 30, 1994.

    The  Company also  has an additional  $39.0 million of  credit facilities at
foreign locations. The  interest rate  on these  facilities range  from 3.0%  to
12.25%  at June 30, 1994. Under the terms of the agreements, the availability of
funds is impacted by various financial covenants and collateral requirements. At
June 30, 1994, $23.7 million was outstanding under these foreign facilities.

    Based  on  covenant  and  collateral  limitations  under  the  above  credit
facilities,  the Company had  $26.5 million available for  borrowing at June 30,
1994.

    The following is a summary of  the Company's long-term debt and other  loans
at June 30, 1994 and 1993 (000's):

<TABLE>
<CAPTION>
                                                                                                1994       1993
                                                                                              ---------  ---------
<S>                                                                                           <C>        <C>
Capitalized lease obligations payable in varying monthly installments primarily at rates
 from 6.9% to 16.6%.........................................................................  $  16,115  $   7,543
10.55% property mortgage due in equal monthly installments to 2011..........................      4,300      4,392
Domestic bank loans collateralized by equipment, payable in varying monthly installments at
 rates from 8.0% to 9.0%, due in 1995 through 1999..........................................      3,097        134
Foreign bank loans collateralized by property and/or equipment, payable in varying monthly
 installments at rates from 6.5% to 10.8%, due in 1997 through 2000.........................      4,803      2,873
Foreign unsecured bank loans payable in varying monthly installments at rates from 4.0% to
 11.9%, due in 1998 through 2006............................................................      4,607        400
                                                                                              ---------  ---------
                                                                                                 32,922     15,342
Less current portion of long-term debt......................................................     (6,105)    (3,532)
                                                                                              ---------  ---------
                                                                                              $  26,817  $  11,810
                                                                                              ---------  ---------
                                                                                              ---------  ---------
</TABLE>

    The  net book  value of  properties mortgaged at  June 30,  1994 amounted to
$6,134,000.  Principal  payments  on  long-term   debt  are  as  follows:   1996
$6,458,000;  1997 $6,246,000;  1998 $6,087,000; 1999  $2,769,000; and $5,257,000
thereafter.

    In accordance  with  Statement of  Financial  Accounting Standards  No.  107
"Disclosures  About Fair Value of Financial Instruments," the fair values of the
Company's long-term debt has  been estimated based on  current rates offered  to
the  Company for debt of the same  remaining maturities. The carrying amounts of
the Company's loans approximate their fair values.

3.  CAPITAL STOCK
    The Company has an employee stock  purchase plan. Under this plan  employees
are  allowed to designate between two and ten percent of their base compensation
to purchase shares of the  Company's common stock at  85 percent of fair  market
value.    In   November   1993,   the    stock   purchase   plan   was   amended

                                      F-10
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

3.  CAPITAL STOCK (CONTINUED)
to cover an additional 1,000,000 shares. During fiscal 1994 and 1993, 69,065 and
99,027 shares were  purchased at  an aggregate  purchase price  of $723,000  and
$688,000, respectively. Shares authorized under this plan that remained unissued
were 1,055,003 and 124,068 at June 30, 1994 and 1993, respectively.

    The Company has three stock option plans, the 1979, 1984, and 1992 Plans, as
amended.  Under these plans, options to  purchase shares of the Company's common
stock are issued to key employees as  well as members of the Company's Board  of
Directors.  Options are issued at 100% of the fair value of the Company's common
stock at the date of grant and become exercisable in annual installments of 20%,
beginning on the first anniversary date. The 1992 plan provides for the increase
in options available for grant  under the plan by 1  1/2% of total common  stock
outstanding  on January 1 of each year. On January 1, 1994 and 1993, 304,503 and
300,061 options, respectively, were added to the plan.

    A summary of the status of options  under the 1992, 1984, and 1979 plans  is
as follows:

<TABLE>
<CAPTION>
                                               SHARES         PRICE RANGE
                                              --------    -------------------
<S>                                           <C>         <C>     <C>  <C>
Outstanding, June 30, 1991.................    616,290    $ 4.00  to   $21.62
  Options granted..........................     92,900      8.00  to    19.62
  Options exercised........................    (30,916)     4.00  to    11.50
  Options expired or canceled..............    (15,874)     4.37  to    19.62
                                              --------
Outstanding, June 30, 1992.................    662,400      4.00  to    21.62
  Options granted..........................     73,700      8.00  to    12.50
  Options exercised........................   (204,640)     4.00  to    10.00
  Options expired or canceled..............    (17,650)     4.00  to    12.75
                                              --------
Outstanding, June 30, 1993.................    513,810      4.00  to    21.62
  Options granted..........................    240,000     11.00  to    17.00
  Options exercised........................    (49,410)     4.00  to    15.38
  Options expired or canceled..............    (23,200)     5.75  to    21.62
                                              --------
Outstanding, June 30, 1994 at an average
 price of $13.97...........................    681,200    $ 4.50  to   $21.62
                                              --------
                                              --------
</TABLE>

    The following table summarizes the options exercisable:

<TABLE>
<CAPTION>
                                              SHARES         PRICE RANGE
                                              -------    -------------------
<S>                                           <C>        <C>     <C>  <C>
June 30, 1994..............................   264,120    $ 4.50  to   $21.62
June 30, 1993..............................   216,760      4.00  to    21.62
June 30, 1992..............................   275,900      4.00  to    21.62
</TABLE>

    Additional  information relating  to the  1992, 1984,  and 1979  plans is as
follows:

<TABLE>
<CAPTION>
                                                                         FISCAL YEARS ENDED JUNE 30,
                                                                       --------------------------------
                                                                          1994       1993       1992
                                                                       ----------  ---------  ---------
<S>                                                                    <C>         <C>        <C>
Options available for grant at June 30...............................     350,214    262,511     20,350
Total reserved common stock shares...................................   1,031,414    776,321    682,750
</TABLE>

                                      F-11
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

4.  GEOGRAPHIC SEGMENTS AND FOREIGN OPERATIONS
    The Company operates in one  business segment. Transfers between  geographic
areas  are  made  at  prices reflecting  market  conditions.  Geographic segment
information including sales and transfers between geographic areas is  presented
below:

<TABLE>
<CAPTION>
                                                                         FISCAL YEARS ENDED (000'S)
                                                                     ----------------------------------
                                                                        1994        1993        1992
                                                                     ----------  ----------  ----------
<S>                                                                  <C>         <C>         <C>
Revenues from Unaffiliated Customers
  United States....................................................  $  169,263  $  137,765  $  123,854
  Europe...........................................................      89,073      79,930      83,382
  Other............................................................      70,546      64,037      58,259
                                                                     ----------  ----------  ----------
    Total..........................................................  $  328,882  $  281,732  $  265,495
                                                                     ----------  ----------  ----------
                                                                     ----------  ----------  ----------
Transfers between Geographic Areas
  United States....................................................  $   97,896  $   84,753  $   87,145
  Europe...........................................................      48,864      56,119      52,150
  Other............................................................       1,379       2,602       5,281
                                                                     ----------  ----------  ----------
    Total..........................................................  $  148,139  $  143,474  $  144,576
                                                                     ----------  ----------  ----------
                                                                     ----------  ----------  ----------
Total Revenues
  United States....................................................  $  267,159  $  222,518  $  210,999
  Europe...........................................................     137,937     136,049     135,532
  Other............................................................      71,925      66,639      63,540
  Intersegment eliminations........................................    (148,139)   (143,474)   (144,576)
                                                                     ----------  ----------  ----------
    Total..........................................................  $  328,882  $  281,732  $  265,495
                                                                     ----------  ----------  ----------
                                                                     ----------  ----------  ----------
Operating Profit
  United States....................................................  $   18,173  $    1,108  $    7,285
  Europe...........................................................       4,710         409       2,692
  Other............................................................         666         811         905
                                                                     ----------  ----------  ----------
    Total..........................................................  $   23,549  $    2,328  $   10,882
                                                                     ----------  ----------  ----------
                                                                     ----------  ----------  ----------
Identifiable Assets
  United States (1)................................................  $  189,591  $  164,485  $  164,778
  Europe...........................................................      74,533      61,364      71,230
  Other............................................................      28,696      22,506      23,297
                                                                     ----------  ----------  ----------
    Total..........................................................  $  292,820  $  248,355  $  259,305
                                                                     ----------  ----------  ----------
                                                                     ----------  ----------  ----------
U.S. Export Sales to Unaffiliated Customers by Destination of Sale
  Europe...........................................................  $    4,362  $    3,293  $    3,630
  Asia.............................................................      20,094      13,319      10,709
  Other............................................................       4,829       4,057       2,448
                                                                     ----------  ----------  ----------
    Total..........................................................  $   29,285  $   20,669  $   16,787
                                                                     ----------  ----------  ----------
                                                                     ----------  ----------  ----------
<FN>
- ------------------------
(1)  Excluding general corporate assets.
</TABLE>

5.  INCOME TAXES
    Effective  July 1, 1993, the Company  adopted the provisions of Statement of
Financial Accounting Standards ("SFAS") No.  109, "Accounting for Income  Taxes"
which requires recognition of deferred tax

                                      F-12
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

5.  INCOME TAXES (CONTINUED)
assets  and liabilities for  temporary differences and  net operating loss (NOL)
and tax credit  carryforwards. Under  SFAS No.  109, deferred  income taxes  are
established  based on enacted tax rates expected  to be in effect when temporary
differences are scheduled to  reverse and NOL and  tax credit carryforwards  are
expected to be utilized. Adoption of SFAS No. 109 did not have a material impact
on  the Company's  financial position or  results from  operations. Prior year's
financial statements have not been restated.

    The major components of the net deferred  tax liability as of June 30,  1994
and July 1, 1993 were as follows (000's):

<TABLE>
<CAPTION>
                                                                       JUNE 30,      JULY 1,
                                                                         1994         1993
                                                                     ------------  -----------
<S>                                                                  <C>           <C>
Deferred tax liability:
  Depreciation.....................................................   $   (9,215)   $ (10,194)
Deferred tax assets:
  Reserves for books, not deducted.................................        3,380        2,851
  Net operating loss carryovers....................................        9,815       16,765
  Credit carryovers................................................        5,417        5,269
  Other............................................................          593          539
                                                                     ------------  -----------
  Total deferred tax assets........................................       19,205       25,424
  Valuation allowance..............................................      (10,596)     (15,546)
                                                                     ------------  -----------
  Net deferred tax liabilities.....................................   $     (606)   $    (316)
                                                                     ------------  -----------
                                                                     ------------  -----------
</TABLE>

    Income (loss) before income taxes was as follows (000's):

<TABLE>
<CAPTION>
                                                                     FISCAL YEARS ENDED
                                                               -------------------------------
                                                                 1994       1993       1992
                                                               ---------  ---------  ---------
<S>                                                            <C>        <C>        <C>
Operations:
  Domestic...................................................  $  15,626  $  (1,590) $   8,733
  Foreign....................................................      3,248     (1,007)     1,779
                                                               ---------  ---------  ---------
                                                               $  18,874  $  (2,597) $  10,512
                                                               ---------  ---------  ---------
                                                               ---------  ---------  ---------
</TABLE>

    The provision (benefit) for income taxes consisted of (000's):

<TABLE>
<CAPTION>
                                                                          FISCAL YEARS ENDED
                                                                    -------------------------------
                                                                      1994       1993       1992
                                                                    ---------  ---------  ---------
<S>                                                                 <C>        <C>        <C>
Current income taxes:
  Domestic........................................................  $   1,539  $    (122) $     614
  Foreign.........................................................      1,331        788        908
                                                                    ---------  ---------  ---------
                                                                    $   2,870  $     666  $   1,522
                                                                    ---------  ---------  ---------
Deferred income taxes:
  Domestic........................................................         --       (160)        --
  Foreign.........................................................        290        (70)      (247)
                                                                    ---------  ---------  ---------
                                                                          290       (230)      (247)
                                                                    ---------  ---------  ---------
                                                                    $   3,160  $     436  $   1,275
                                                                    ---------  ---------  ---------
                                                                    ---------  ---------  ---------
</TABLE>

    Deferred  taxes  result  primarily from  temporary  differences  relating to
depreciation, inventory valuation and state taxes.

                                      F-13
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

5.  INCOME TAXES (CONTINUED)
    The Company's effective tax  rate on pretax income  (loss) differs from  the
U.S. Federal Statutory tax rate as follows:

<TABLE>
<CAPTION>
                                                          FISCAL YEARS ENDED
                                                     -----------------------------
                                                      1994       1993       1992
                                                     -------    -------    -------
<S>                                                  <C>        <C>        <C>
Statutory tax rate (benefit)......................    35.0%     (34.0)%     34.0%
Utilization of domestic net operating loss
 carryforward.....................................   (36.6)        --      (23.1)
Change in valuation allowance.....................     9.6         --         --
Foreign tax differential..........................     2.6       40.9        0.5
Domestic loss producing no current tax benefit....      --       16.6         --
State taxes, net of federal tax benefit...........     1.5       (7.5)        --
Alternative minimum tax...........................     2.2         --         --
Other, net........................................     2.4        0.8        0.7
                                                     -------    -------    -------
                                                      16.7%      16.8%      12.1%
                                                     -------    -------    -------
                                                     -------    -------    -------
</TABLE>

    At  June  30, 1994,  the  Company had  approximately  $28.8 million  of U.S.
federal income tax net operating loss carryovers which begin to expire in  2004.
During  the  year,  the Company  utilized  approximately $20.4  million  in U.S.
federal  net  operating  loss  carryovers.   The  estimated  tax  benefit   from
utilization of the net operating loss carryover was $6.9 million.

    The  Company has approximately $3.1 million, $1.1 million, and $0.2 million,
respectively, of investment,  research and development,  and foreign tax  credit
carryforwards  which  expire from  1995 to  2001. In  addition, the  Company has
approximately  $0.9  million  of  alternative  minimum  tax  credits  which  are
available to offset future regular tax.

    In  general, Section 382 of the United States Internal Revenue Code includes
provisions which limit the amount of net operating loss carryforwards and  other
tax  attributes that  may be  used annually  in the  event that  a 50% ownership
change (as defined) takes place in any three year period. At June 30, 1994,  the
Company had not experienced a change in ownership for purposes of Section 382.

6.  PROFIT SHARING AND RETIREMENT PLANS
    The  Company  has established  defined contribution  plans for  all eligible
employees. The Profit Sharing and Retirement Plan provides for contributions  by
the  Company in such amounts  as the Board of  Directors may annually determine.
The Company has also established a  voluntary Retirement Savings Plan (401K)  to
which  the  Company  makes  an  annual  contribution  of  up  to  $600  for each
participating employee. Combined plan contributions totaled $841,000,  $511,000,
and  $1,250,000 for fiscal years 1994, 1993, and 1992, respectively. Fiscal year
1992 contributions included 40,000 shares of  the Company's common stock to  its
Profit Sharing and Retirement Plan.

7.  ENVIRONMENTAL MATTERS
    Federal,  state and local  laws and regulations  impose various restrictions
and controls on the discharge of certain materials, chemicals and gases used  in
semiconductor processing. The Company does not believe that compliance with such
laws  and  regulations will  have  a material  adverse  effect on  its financial
position.

    The Company and Rachelle Laboratories, Inc. ("Rachelle"), its pharmaceutical
subsidiary which discontinued operations in 1986, have been named among  several
hundred   entities  as  potentially  responsible   parties  ("PRPs")  under  the
provisions  of  the  Comprehensive  Environmental  Response,  Compensation   and
Liability  Act  of  1980  ("CERCLA"),  in  connection  with  the  United  States
Environmental Protection  Agency's  ("EPA")  investigation of  the  disposal  of
allegedly  hazardous  substances at  a major  superfund  site in  Monterey Park,
California (the "OII site").  Certain PRPs who settled  certain claims with  the
EPA under two

                                      F-14
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

7.  ENVIRONMENTAL MATTERS (CONTINUED)
consent  decrees, filed suit  in Federal Court  in May 1992  against a number of
other PRPs, including IR, for cost  recovery and contribution under CERCLA.  The
lawsuit  against  IR, relating  to  the first  and  second consent  decrees, was
settled in August 1993 for the sum of $40,000 to avoid protracted and  expensive
litigation.  Claims have been  made with the Company's  insurers with respect to
the OII  site matter;  however, there  can be  no assurance  that the  insurance
coverage  attaches to these  claims. There remains  the potential for litigation
against IR relating to future consent decrees. The Company does not believe that
either it or Rachelle  is responsible for  the disposal at the  OII site of  any
material  constituting hazardous substances under  CERCLA. Although the ultimate
resolution of this matter is unknown, the Company believes that it will not have
a material adverse impact on its financial position.

    In May 1993 the Company purchased property from its Employee Profit  Sharing
and  Retirement Plan.  At the time  of the  purchase it was  determined that the
property required  clean up  of seepage  from a  storage tank,  at an  estimated
additional  cost of $500,000. The Company commenced  the clean up in fiscal year
1994, and the costs to  be incurred will be  capitalized as additional costs  of
the property.

    On July 18, 1994, the Company received a letter from the State of Washington
Department  of Ecology  (the "Department") notifying  the Company  of a proposed
finding that the Company is a potentially liable person ("PLP") for alleged  PCE
contamination  (also known as  perchloroethylene, tetrachloroethylene, and other
names) ("PCE") of real  property and groundwater  in Yakima County,  Washington.
The  letter alleges that the  Company arranged for disposal  or treatment of the
PCE or arranged with a transporter for  the disposal or treatment of the PCE  in
Yakima  County. The Company replied on August 11, 1994 to this letter and stated
that it has not contributed to PCE or other solvent contamination at the  Yakima
County  site and that it should not be designated a PLP. On October 11, 1994 the
Company received  a letter  from the  Department notifying  the Company  of  its
finding that the Company is a PLP in the above matter.

    The  Company received a  letter dated September  9, 1994, from  the State of
California Department of Toxic Substances  Control stating that the Company  may
be  a PRP  for the deposit  of hazardous  substances at a  facility in Whittier,
California. The  Company's  investigation of  this  matter has  just  begun  and
therefore an opinion cannot be expressed as to any ultimate responsibility.

8.  COMMITMENTS
    The  future  minimum  lease  commitments  under  non-cancelable  capital and
operating leases of equipment and real property at June 30, 1994 were as follows
(000's):

<TABLE>
<CAPTION>
                                                                     CAPITAL    OPERATING       TOTAL
FISCAL YEARS                                                         LEASES      LEASES      COMMITMENTS
- ------------------------------------------------------------------  ---------  -----------  -------------
<S>                                                                 <C>        <C>          <C>
1995..............................................................  $   5,282   $   6,050     $  11,332
1996..............................................................      4,949       5,272        10,221
1997..............................................................      4,436       4,457         8,893
1998..............................................................      3,880       1,826         5,706
1999..............................................................        977         628         1,605
Later years.......................................................          3       1,208         1,211
Less imputed interest.............................................     (3,412)         --        (3,412)
                                                                    ---------  -----------  -------------
Total minimum lease payment.......................................  $  16,115   $  19,441     $  35,556
                                                                    ---------  -----------  -------------
                                                                    ---------  -----------  -------------
</TABLE>

Total rental expense on all operating  leases charged to income was  $6,723,000,
$5,591,000, and $3,193,000 in fiscal years 1994, 1993 and 1992, respectively.

9.  INTELLECTUAL PROPERTY RIGHTS
    A  competitor, prior to settlement of  patent litigation with the Company in
February 1992, obtained reexamination by the United States Patent and  Trademark
Office ("PTO") of the Company's MOSFET

                                      F-15
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

9.  INTELLECTUAL PROPERTY RIGHTS (CONTINUED)
patents  4,376,286, 4,959,699 and 5,008,725. The PTO confirmed the patentability
of the '725 patent in January 1993 and the '286 patent in July 1993 and the '699
patent in October 1993. In other  reexamination proceedings the PTO in  November
1992  agreed to reexamine the Company's 4,642,666 patent and in July 1993 agreed
to reexamine the Company's 4,705,759 patent. More recently, the PTO on September
12, 1994 agreed to reexamine the Company's 4,642,666 and 4,959,699 patents.  The
patents   subject  to  reexamination  are   fundamental  to  the  Company's  MOS
transistors.

10. LITIGATION
    The Company and  SGS-Thomson Microelectronics, Inc.  ("SGS") are engaged  in
various legal proceedings relating to their respective power MOSFET patents. SGS
filed  suit against the Company in June 1991 in Federal District Court in Texas,
charging infringement of U.S.  patent 4,553,314. On motion  by the Company,  the
suit  was transferred to the Federal  District Court in Los Angeles, California,
and thereafter SGS amended its complaint to charge infringement of U.S.  patents
4,495,513  and 4,712,127.  SGS alleges, in  substance, that  the Company's power
MOSFET and  IGBT products  infringe the  '314 patent,  that the  Company's  IGBT
products  infringe the '513  patent and that certain  packages for IR's products
(including  certain  power  MOSFET  packages)  infringe  the  '127  patent.  The
complaint,  as amended,  seeks unspecified actual  damages (but no  less than an
unspecified reasonable royalty) and an  injunction restraining further sales  of
such  products. On February  1, 1993, the District  Court dismissed SGS's claims
for infringement of the '127 and '513 patents for lack of standing and on  March
15,  1993 ruled  that the  SGS '314 patent  is unenforceable  due to inequitable
conduct. SGS appealed these rulings, as well as the order transferring the  case
to   California,  to  the   Court  of  Appeals  for   the  Federal  Circuit.  IR
cross-appealed a separate ruling by the  District Court denying IR's motion  for
summary  judgment that  the '314  patent is invalid.  In July  1994, the Federal
Circuit reversed the District Court's grants of summary judgment as to the '513,
'127 and '314 patents  and affirmed the District  Court's denial of IR's  motion
for  summary  judgment of  invalidity of  the '314  patent. The  Federal Circuit
ordered, however, that  the case should  proceed in California.  Cross-petitions
for  writs of  certiorari are pending  before the  U.S. Supreme Court  as to the
jurisdictional and venue rulings of the  Federal Circuit. No trial date has  yet
been  set and the  ultimate outcome of the  case as to the  three SGS patents is
unknown.

    In separate proceedings before the same California District Court, IR sought
enforcement of a prior license agreement between  IR and SGS. The Court in  July
1994  granted the Company's  motions to enforce the  license agreement with SGS,
requiring SGS to pay additional past  and prospective royalties under IR's  U.S.
patents  4,959,699 and 4,642,666 on SGS's sales  of power MOSFET, IGBT and power
IC products. SGS has  filed a separate  appeal of this  ruling with the  Federal
Circuit.

    The  Company has  also filed  a separate action  in the  same District Court
against SGS  and its  Italian affiliate,  SGS-Thomson Microelectronics,  S.r.l.,
seeking  an  injunction  against  infringement  of  the  Company's  U.S. patents
5,008,725 and 5,130,767. Trial of the Company's action has been set for  January
25, 1995.

    The  Company,  its  directors  and  certain  officers  have  been  named  as
defendants in three class action lawsuits filed in federal court in  California.
These  suits  seek unspecified  compensatory  and punitive  damages  for alleged
intentional and  negligent  misrepresentations  and violations  of  the  federal
securities laws. They generally allege that the Company and the other defendants
made  materially  false statements  and/or omitted  to  state material  facts in
connection with the public offering of  the Company's common stock completed  on
April  24,  1991  and/or the  redemption  and  conversion in  June  1991  of the
Company's 9% Convertible Subordinated Debentures Due 2010. They also allege that
the Company's projections for growth in fiscal 1992 were materially  misleading.
Although  the Company believes that the claims  alleged in the suits are without
merit, the  ultimate  outcome  cannot be  presently  determined.  A  substantial
judgment or

                                      F-16
<PAGE>
              INTERNATIONAL RECTIFIER CORPORATION AND SUBSIDIARIES
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

10. LITIGATION (CONTINUED)
settlement,  if  any, could  have  a material  adverse  effect on  the Company's
financial condition and  results of  operations. Two  of these  suits also  name
Kidder, Peabody & Co. Incorporated and Montgomery Securities as defendants.

    The Company is currently involved in litigation arising in the normal course
of  business. Management does  not believe that the  ultimate resolution of this
litigation will have a material adverse impact on the financial position of  the
Company (also see Notes 7 and 9).

11. EXECUTIVE AGREEMENT
    The  Company entered into  an executive agreement with  Eric Lidow dated May
15, 1991 providing for his continued employment with the Company for a six  year
period as Chief Executive Officer and President or in such other position as the
Board  of Directors may determine.  Mr. Lidow's salary at  fiscal year end under
this agreement was $550,000. Upon Mr. Lidow's retirement from the Company (or  a
change in control) he will receive annual payments (Founder's Pension) of 90% of
his  then current salary. Upon Mr. Lidow's  death, payments will be continued to
his wife,  if  she  survives him,  in  an  amount equal  to  two-thirds  of  his
retirement  benefits  for the  remainder of  her  life. Under  the terms  of the
Founder's Pension, $572,000, $572,000, and $611,000 have been expensed in fiscal
years 1994, 1993, and 1992, respectively.

12. QUARTERLY FINANCIAL DATA (UNAUDITED)
    Summarized quarterly financial data is  as follows (000's, except per  share
amounts):

<TABLE>
<CAPTION>
                                                                                               NET
                                                                  GROSS         NET       INCOME (LOSS)
                                                     REVENUES    PROFIT    INCOME (LOSS)    PER SHARE
                                                     ---------  ---------  -------------  -------------
<S>                                                  <C>        <C>        <C>            <C>
1994
- ---------------------------------------------------
1st Quarter........................................  $  73,094  $  23,420    $   1,976      $    0.10
2nd Quarter........................................     79,104     25,613        3,070           0.15
3rd Quarter........................................     84,252     28,110        4,206           0.21
4th Quarter........................................     92,432     31,795        6,462           0.32

1993
- ---------------------------------------------------
1st Quarter........................................  $  64,980  $  16,937    $  (1,878)     $   (0.09)
2nd Quarter........................................     70,452     19,417       (1,993)         (0.10)
3rd Quarter........................................     70,572     20,513          125           0.01
4th Quarter........................................     75,728     22,181          713           0.04
</TABLE>

                                      F-17
<PAGE>
                           [INSIDE BACK COVER PHOTO]

[PHOTO2]
Daytime aerial photo of International Rectifier's HEXFET America site.

[CAPTION]
HEXFET   America,  International  Rectifier's  principal  power  MOS  transistor
fabrication and  assembly facility  in  Temecula, California,  processes  wafers
using  linear flow manufacturing  similar to a  production line for automobiles.
In-line production  sharply  reduces  manufacturing  cycle  time  and  inventory
requirements.

To  meet rising demand  for power MOSFETs and  IGBTs, International Rectifier is
planning to increase  the plant's  wafer fabrication  capacity by  approximately
75%.  The expansion is now in progress,  and additional capacity is scheduled to
be in production by the end of calendar 1995.
<PAGE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

    NO  DEALER, SALESPERSON OR ANY OTHER PERSON  HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO  MAKE ANY  REPRESENTATIONS NOT CONTAINED  IN THIS  PROSPECTUS,
AND,  IF GIVEN OR MADE,  SUCH INFORMATION OR REPRESENTATIONS  MUST NOT BE RELIED
UPON  AS  HAVING  BEEN  AUTHORIZED  BY  THE  COMPANY  OR  BY  ANY  OF  THE  U.S.
UNDERWRITERS.  THIS PROSPECTUS  DOES NOT CONSTITUTE  AN OFFER  OF ANY SECURITIES
OTHER THAN THOSE TO WHICH IT RELATES OR  AN OFFER TO SELL, OR A SOLICITATION  OF
AN  OFFER TO  BUY, TO  ANY PERSON  IN ANY  JURISDICTION WHERE  SUCH AN  OFFER OR
SOLICITATION WOULD BE UNLAWFUL. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR  ANY
SALE  MADE HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT
THE INFORMATION CONTAINED  HEREIN IS CORRECT  AS OF ANY  TIME SUBSEQUENT TO  THE
DATE HEREOF.

                             ---------------------

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                        Page
                                                         ---
<S>                                                  <C>
Prospectus Summary.................................           3
The Company........................................           5
Risk Factors.......................................           5
Use of Proceeds....................................           8
Capitalization.....................................           8
Price Range of Common Stock........................           9
Dividend Policy....................................           9
Selected Consolidated Financial Data...............          10
Management's Discussion and Analysis of Financial
  Condition and Results of Operations..............          12
Business...........................................          15
Management.........................................          24
Description of Capital Stock.......................          25
Underwriting.......................................          27
Legal Opinions.....................................          29
Experts............................................          29
Available Information..............................          29
Incorporation of Certain Documents by Reference....          30
Glossary...........................................          31
Index to Consolidated Financial Statements.........         F-1
</TABLE>

                                4,500,000 SHARES

                                     [LOGO]

                                 INTERNATIONAL
                                   RECTIFIER
                                  CORPORATION

                                  COMMON STOCK

                              -------------------

                                   PROSPECTUS
                                          , 1994

                             ---------------------

                                LEHMAN BROTHERS

                             KIDDER, PEABODY & CO.
                                  INCORPORATED

                             MONTGOMERY SECURITIES

                            PAINEWEBBER INCORPORATED

                               SMITH BARNEY INC.

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
INFORMATION   CONTAINED  HEREIN  IS  SUBJECT   TO  COMPLETION  OR  AMENDMENT.  A
REGISTRATION STATEMENT  RELATING TO  THESE SECURITIES  HAS BEEN  FILED WITH  THE
SECURITIES  AND EXCHANGE  COMMISSION. THESE SECURITIES  MAY NOT BE  SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR  TO THE TIME THE REGISTRATION STATEMENT  BECOMES
EFFECTIVE.  THIS  PROSPECTUS  SHALL  NOT  CONSTITUTE AN  OFFER  TO  SELL  OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE  SECURITIES
IN  ANY STATE IN WHICH SUCH OFFER,  SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
<PAGE>
                [ALTERNATE SECTION FOR INTERNATIONAL PROSPECTUS]

   
                 Subject to Completion, dated November 16, 1994
    
PROSPECTUS
                                4,500,000 SHARES
                                     [LOGO]

                      INTERNATIONAL RECTIFIER CORPORATION
                                  COMMON STOCK
                                ----------------

    All of the 4,500,000 shares of Common Stock, par value $1.00 per share  (the
"Shares"),  offered hereby are being sold by International Rectifier Corporation
("IR" or  the "Company").  Of  the 4,500,000  shares  of Common  Stock  offered,
900,000 shares will be offered initially outside the United States and Canada by
the  International Managers (the "International  Offering") and 3,600,000 shares
will be  offered  concurrently in  the  United States  and  Canada by  the  U.S.
Underwriters (the "U.S. Offering" and, together with the International Offering,
the  "Offerings"). The offering price and underwriting discounts and commissions
for the U.S.  Offering and  the International  Offering will  be identical.  See
"Underwriting."

    The  Company's Common Stock is listed on the New York Stock Exchange and the
Pacific Stock Exchange under the symbol "IRF." On October 27, 1994, the  closing
price  for the Company's Common  Stock on the New  York Stock Exchange Composite
Tape was  $23.625 per  share. See  "Price  Range of  Common Stock  and  Dividend
Policy."
                             ---------------------

    SEE "RISK FACTORS" FOR CERTAIN MATTERS RELEVANT TO AN INVESTMENT IN THE
                            COMPANY'S COMMON STOCK.
                             ---------------------

THESE  SECURITIES  HAVE  NOT  BEEN APPROVED  OR  DISAPPROVED  BY  THE SECURITIES
    AND EXCHANGE  COMMISSION  OR ANY  STATE  SECURITIES COMMISSION  NOR  HAS
       THE    SECURITIES   AND   EXCHANGE   COMMISSION   OR   ANY   STATE
           SECURITIES  COMMISSION   PASSED  UPON   THE  ACCURACY   OR
              ADEQUACY  OF  THIS  PROSPECTUS.  ANY  REPRESENTATION
                      TO THE CONTRARY IS A CRIMINAL OFFENSE.

   
<TABLE>
<CAPTION>
                                                                Underwriting
                                                                 Discounts
                                               Price                and             Proceeds to
                                             to Public        Commissions (1)       Company (2)
<S>                                      <C>                 <C>                 <C>
Per Share..............................  $                   $                   $
Total (3)..............................  $                   $                   $
<FN>
(1)  The Company has agreed to indemnify the International Managers and the U.S.
     Underwriters against certain liabilities,  including liabilities under  the
     Securities Act of 1933, as amended. See "Underwriting."
(2)  Before deducting estimated expenses of the Offerings of $475,000 payable to
     the Company.
(3)  The   Company  has  granted   the  International  Managers   and  the  U.S.
     Underwriters a 30-day option to purchase up to 675,000 additional shares of
     Common Stock on the same terms and conditions as set forth above solely  to
     cover  over-allotments, if  any. If such  option is exercised  in full, the
     total Price to Public, Underwriting Discounts and Commissions and  Proceeds
     to  Company will be $          , $           and $          , respectively.
     See "Underwriting."
</TABLE>
    

                             ---------------------

    The shares of  Common Stock offered  by this Prospectus  are offered by  the
International  Managers subject  to prior  sale, to  withdrawal, cancellation or
modification of the offer without notice,  to delivery to and acceptance by  the
International  Managers and to  certain further conditions.  It is expected that
delivery of the Shares will be made at the offices of Lehman Brothers Inc.,  New
York, New York, on or about            , 1994.
                             ---------------------

LEHMAN BROTHERS

               KIDDER, PEABODY INTERNATIONAL PLC

                              MONTGOMERY SECURITIES

                                             PAINEWEBBER INTERNATIONAL

                                                               SMITH BARNEY INC.

              , 1994
<PAGE>
                [ALTERNATE SECTION FOR INTERNATIONAL PROSPECTUS]

               CERTAIN UNITED STATES FEDERAL TAX CONSEQUENCES TO
                           NON-UNITED STATES HOLDERS

    The  following  is a  general discussion  of  certain United  States federal
income tax consequences of the ownership and disposition of the shares of Common
Stock by a holder who, for United  States federal income tax purposes, is not  a
United  States person (a "Non-United  States Holder") who holds  such stock as a
capital asset. For  these purposes, "United  States person" means  a citizen  or
resident  of  the  United States,  a  corporation, partnership  or  other entity
created or organized in or under the laws of the United States or any  political
subdivision  thereof, or an  estate or trust  whose income is  subject to United
States federal income tax regardless of its source. This discussion is based  on
current  provisions of the  Internal Revenue Code of  1986, as amended, existing
and proposed regulations promulgated thereunder and administrative and  judicial
interpretations  thereof,  all  of which  are  subject to  change  possibly with
retroactive effect. This discussion is for general information only and does not
consider all  specific  facts  and  circumstances that  may  be  relevant  to  a
particular  holder's tax  position. Each  Non-United States  Holder is  urged to
consult its own tax adviser with respect to the United States federal income tax
consequences of owning and disposing of shares  of Common Stock, as well as  any
tax  consequences that may  arise under the  laws of any  state, municipality or
other taxing jurisdiction.

    DIVIDENDS.  Dividends paid  on shares of Common  Stock to Non-United  States
Holders generally will be subject to withholding of United States federal income
tax  at the  rate of 30  percent, subject  to a reduction  for Non-United States
Holders eligible for the benefits of an applicable tax treaty. In the event that
the dividend is effectively  connected with the conduct  of a trade or  business
within  the  United States  by the  Non-United States  Holder, the  dividend (as
adjusted by  any applicable  deductions)  will generally  be subject  to  United
States  federal income tax at regular  graduated rates (if certain certification
and disclosure requirements are met) instead  of the 30 percent withholding  tax
described  above. Any such effectively connected dividends received by a foreign
corporation may also, under certain  circumstances, be subject to an  additional
"branch  profits tax" at a 30% rate or such lower rate as may be specified by an
applicable income tax treaty.  Holders that are partnerships  and trusts may  be
subject  to certain additional withholding requirements and are urged to consult
their tax  advisers as  to the  applicability of  such requirements.  Non-United
States Holders may be required to comply with certain certification requirements
in order to claim treaty benefits or to be exempt from withholding.

    The Company must report annually to the Internal Revenue Service and to each
Non-United  States Holder  the amount  of dividends  paid and  tax withheld with
respect to  shares  of Common  Stock  held  by such  holder.  These  information
reporting  requirements apply regardless  of whether withholding  was reduced or
eliminated by  an applicable  tax  treaty. This  information  may also  be  made
available  by the Internal Revenue Service to  tax authorities of the country in
which the Non-United States Holder resides.

    Under current  U.S.  Treasury  regulations, dividends  paid  to  an  address
outside  the United States are presumed to be paid to a resident of such country
for purposes of the withholding discussed above (unless the payor has  knowledge
to  the  contrary),  and,  under the  current  interpretation  of  U.S. Treasury
regulations, for purposes of determining the applicability of a tax treaty rate.
These rules are  currently being  studied by  the Internal  Revenue Service  and
Treasury  Department  and  may  be  changed in  the  future  to  require certain
additional certifications by a non-U.S. Holder of Common Stock.

    GAIN ON DISPOSITION.  Any gain recognized upon a disposition of Common Stock
by a Non-United  States Holder will  generally not be  subject to United  States
federal income tax unless (i) the gain is effectively connected with the conduct
of  a trade or business within the United States of the Non-United States Holder
or,  if  a  tax  treaty  applies,  attributable  to  a  permanent  establishment
maintained  by the Non-United States Holder or (ii) the Non-United States Holder
is an individual who holds the Common Stock as a capital asset and is present in
the United States for 183  days or more in the  taxable year of the  disposition
and  either (a) such  individual has a  "tax home" (as  defined for U.S. federal
income tax purposes) in the United States or (b) the gain is attributable to  an
office  or other fixed place of business maintained in the United States by such
individual. If an  individual Non-United  States Holder falls  under clause  (i)
above,  he or she  will be taxed  on his or  her net gain  derived from the sale
under regular  graduated  U.S.  federal  income tax  rates.  If  the  individual
Non-United  States  Holder falls  under clause  (ii)  above, he  or she  will be
subject to

                                       27
<PAGE>
                [ALTERNATE SECTION FOR INTERNATIONAL PROSPECTUS]
a flat 30% tax  on the gain derived  from the sale which  may be offset by  U.S.
capital  losses (notwithstanding  the fact  that he or  she is  not considered a
resident of the United States).  Thus, individual Non-United States Holders  who
have  spent 183 days or more  in the United States in  the taxable year in which
they contemplate a  sale of  the Common  Stock are  urged to  consult their  tax
advisers  as to the tax consequences of such sale. If a Non-United States Holder
that is a foreign corporation falls under clause (i) above, it will be taxed  on
its gain under regular graduated U.S. federal income tax rates and, in addition,
may  be  subject to  the branch  profits tax  equal to  30% of  its "effectively
connected earnings and profits" within the  meaning of the Code for the  taxable
year,  as adjusted for certain items, unless it qualifies for a lower rate under
an applicable  income  tax treaty.  The  foregoing  treatment is  based  on  the
Company's  belief that  it does  not constitute  a "United  States real property
holding corporation" for United States  income tax purposes. However, there  can
be no assurance that the Company will not be so characterized in the future.

    ESTATE  TAX.  Shares of Common Stock held by an individual Non-United States
Holder at the time  of his death  will be subject to  the United States  federal
estate  tax imposed  on the estates  of nonresident  aliens in the  absence of a
contrary provision in an applicable estate tax treaty.

BACKUP WITHHOLDING AND INFORMATION REPORTING

    DIVIDENDS.  Dividends that  are subject to U.S.  withholding tax at the  30%
statutory  rate  or  at  a  reduced  tax  treaty  rate  and  dividends  that are
effectively connected with  the conduct  of a trade  or business  in the  United
States (if certain certification and disclosure requirements are met) are exempt
from  backup  withholding  of  U.S.  federal  income  tax.  In  general,  backup
withholding at  a rate  of 31%  and information  reporting will  apply to  other
dividends  paid  on shares  of  Common Stock  to  holders that  are  not "exempt
recipients" and  fail to  provide  in the  manner required  certain  identifying
information  (such  as the  holder's name,  address and  taxpayer identification
number). Generally, individuals are not exempt recipients, whereas  corporations
and certain other entities generally are exempt recipients.

    DISPOSITION  OF COMMON STOCK.   Information reporting and backup withholding
imposed at a rate of 31% will apply  to the proceeds of a disposition of  Common
Stock  paid to or through a U.S. office  of a broker unless the disposing holder
certifies its non-U.S. status or otherwise establishes an exemption.  Generally,
U.S. information reporting and backup withholding will not apply to a payment of
disposition  proceeds if the payment is made outside the United States through a
non-U.S. office  of  a  non-U.S. broker.  However,  U.S.  information  reporting
requirements (but not backup withholding) will apply to a payment of disposition
proceeds  outside the United States if (A) the payment is made through an office
outside the United States of a broker that  is either (i) a U.S. person, (ii)  a
foreign person which derives 50% or more of its gross income for certain periods
from  the  conduct of  a  trade or  business  in the  United  States or  (iii) a
"controlled foreign corporation" for  U.S. federal income  tax purposes and  (B)
the  broker fails to maintain documentary evidence that the holder is a non-U.S.
holder and that  certain conditions  are met, or  that the  holder otherwise  is
entitled to an exemption.

    Backup  withholding is not  an additional tax. Rather,  the tax liability of
persons subject  to backup  withholding will  be reduced  by the  amount of  tax
withheld.  If withholding results  in an overpayment  of taxes, a  refund may be
obtained, provided  that  the required  information  is furnished  to  the  U.S.
Internal Revenue Service.

    These  information  and backup  withholding rules  are  under review  by the
United States Treasury. Their  application to the  ownership and disposition  of
shares of Common Stock could be changed prospectively by future regulations.

                                       28
<PAGE>
                                  UNDERWRITING

    Under  the terms  of and  subject to  the conditions  contained in  the U.S.
Underwriting Agreement,  the  form  of which  is  filed  as an  exhibit  to  the
Registration  Statement of which this Prospectus  forms a part, the underwriters
of the offering of the Shares in  the United States and Canada named below  (the
"U.S.  Underwriters")  for  whom Lehman  Brothers  Inc., Kidder,  Peabody  & Co.
Incorporated, Montgomery Securities, PaineWebber  Incorporated and Smith  Barney
Inc.  are  acting  as representatives  (the  "Representatives"),  have severally
agreed to purchase from the Company, and the Company has agreed to sell to  each
U.S.  Underwriter, the aggregate number of Shares set forth opposite the name of
each such U.S. Underwriter below:

<TABLE>
<CAPTION>
                                                              NUMBER OF
U.S. UNDERWRITERS                                              SHARES
- ------------------------------------------------------------  ---------
<S>                                                           <C>
Lehman Brothers Inc.........................................
Kidder, Peabody & Co. Incorporated..........................
Montgomery Securities.......................................
PaineWebber Incorporated....................................
Smith Barney Inc............................................
                                                              ---------
    Total...................................................  3,600,000
                                                              ---------
                                                              ---------
</TABLE>

    Under  the  terms  of  and  subject  to  the  conditions  contained  in  the
International  Underwriting Agreement, the form of  which is filed as an exhibit
to the Registration Statement of which  this Prospectus is a part, the  managers
of  the concurrent offering of  the Shares outside the  United States and Canada
(the "International  Managers"  and together  with  the U.S.  Underwriters,  the
"Underwriters") for whom Lehman Brothers International (Europe), Kidder, Peabody
International  PLC, Montgomery Securities, PaineWebber International (U.K.) Ltd.
and Smith Barney Inc.  are acting as lead  managers (the "Lead Managers"),  have
severally  agreed to purchase  from the Company,  and the Company  has agreed to
sell to each  International Manager, the  aggregate number of  Shares set  forth
opposite the name of each such International Manager below:

<TABLE>
<CAPTION>
                                                              NUMBER OF
INTERNATIONAL MANAGERS                                         SHARES
- ------------------------------------------------------------  ---------
<S>                                                           <C>
Lehman Brothers International (Europe)......................
Kidder, Peabody International PLC...........................
Montgomery Securities.......................................
PaineWebber International (U.K.) Ltd........................
Smith Barney Inc............................................
                                                              ---------
    Total...................................................    900,000
                                                              ---------
                                                              ---------
</TABLE>

    The   Company  has  been   advised  that  the   U.S.  Underwriters  and  the
International Managers, respectively, propose to offer part of the Shares to the
public at the public offering price set forth on the cover page hereof and  part
to  certain dealers  at a price  that represents  a concession not  in excess of
$       per share under the public offering price. The U.S. Underwriters and the
International Managers may allow, and such dealers may reallow, a concession not
in excess of $        per share to  certain other brokers or dealers. After  the
initial  offering to the public, the offering  price and other selling terms may
be changed by the U.S. Underwriters and International Managers.

    The U.S. Underwriting Agreement and the International Underwriting Agreement
(collectively, the "Underwriting  Agreements") provide that  the obligations  of
the  several U.S.  Underwriters and  the International  Managers to  pay for and
accept delivery of the shares of Common Stock offered pursuant to the  Offerings
are  subject to  certain conditions  contained therein, and  that if  any of the
foregoing shares of Common Stock are purchased by the U.S. Underwriters pursuant
to the U.S. Underwriting Agreement or by the International Managers pursuant  to
the  International Underwriting Agreement, all the shares of Common Stock agreed
to be purchased by either the  U.S. Underwriters or the International  Managers,
as  the case may be, pursuant  to their respective Underwriting Agreements, must
be so purchased. The closing

                                       29
<PAGE>
under the International  Underwriting Agreement  is a condition  to the  closing
under   the  U.S.  Underwriting  Agreement,  and  the  closing  under  the  U.S.
Underwriting Agreement is  a condition  to the closing  under the  International
Underwriting Agreement.

    The  Company  has granted  to the  U.S.  Underwriters and  the International
Managers an option to purchase up  to an aggregate of 675,000 additional  shares
of Common Stock at the price to public less the underwriting discount, solely to
cover over-allotments, if any. Such option may be exercised at any time up to 30
days after the date of this Prospectus. To the extent that the U.S. Underwriters
or International Managers exercise such option, each of the U.S. Underwriters or
the  International Managers, as the  case may be, will  be committed, subject to
certain conditions, to purchase a number of Common Stock shares proportionate to
such  U.S.  Underwriter's  or  International  Manager's  initial  commitment  as
indicated in the preceding tables.

    The  U.S. Underwriters and  the International Managers  have entered into an
Agreement Between U.S. Underwriters  and International Managers (the  "Agreement
Between  U.S. Underwriters and International  Managers"), pursuant to which each
U.S. Underwriter has  agreed that,  as part of  the distribution  of the  Shares
(plus  any of the shares to cover over-allotments) offered in the U.S. Offering,
(i) it is not purchasing any such Shares for the account of anyone other than  a
U.S. Person (as defined below) and (ii) it has not offered or sold, and will not
offer,  sell,  resell or  deliver, directly  or indirectly,  any of  such Shares
outside the United States or  Canada or to anyone other  than a U.S. Person.  In
addition,  pursuant  to such  agreement, each  International Manager  has agreed
that, as part of the distribution of the Shares (plus any of the shares to cover
over-allotments) offered in the International Offering, (i) it is not purchasing
any such Shares for the account of a U.S. Person and (ii) it has not offered  or
sold,  and will not offer, sell, resell  or deliver, directly or indirectly, any
of such  Shares in  the United  States or  Canada or  to any  U.S. Person.  Each
International  Manager has also agreed that it will offer to sell shares only in
compliance with all relevant requirements of any applicable laws.

    The foregoing limitations do not  apply to stabilization transactions or  to
certain  other  transactions specified  in the  Underwriting Agreements  and the
Agreement Between U.S.  Underwriters and International  Managers, including  (i)
certain  purchases and sales between the U.S. Underwriters and the International
Managers, (ii) certain offers, sales, resales, deliveries or distributions to or
through investment advisors or  other persons exercising investment  discretion,
(iii)  purchases, offers or sales by a U.S. Underwriter who is also acting as an
International Manager or  by an International  Manager who is  also acting as  a
U.S.  Underwriter and (iv) other transactions  specifically approved by the U.S.
Underwriters and International Managers.  As used herein,  (a) the term  "United
States"  means the United States of America (including District of Columbia) and
its territories, its possessions  and other areas  subject to its  jurisdiction,
and  (b) the  term "U.S.  Person" means  any resident  or citizen  of the United
States, any corporation, partnership or other entity created or organized in  or
under  the laws of the United States or  any estate or trust the income of which
is subject to  United States  income taxation regardless  of the  source of  its
income  (other than  the foreign  branch of any  U.S. Person),  and includes any
United States branch of a person other than a U.S. Person.

    Pursuant to  the  Agreement  Between  U.S.  Underwriters  and  International
Managers,  sales may be made between the U.S. Underwriters and the International
Managers of such  number of shares  of Common  Stock as may  be mutually  agreed
upon.  The price of any  shares sold shall be the  public offering price then in
effect for Shares  being sold  by the  U.S. Underwriters  and the  International
Managers,  less  the selling  concession unless  otherwise determined  by mutual
agreement. To the extent that there are sales between the U.S. Underwriters  and
the  International Managers pursuant to  the Agreement Between U.S. Underwriters
and International Managers, the number of shares initially available for sale by
the U.S. Underwriters or by the International Managers may be more or less  than
the amount appearing on the cover page of this Prospectus.

    Each  International Manager has  represented and agreed that  (i) it has not
offered or sold, and will not offer or sell, in the United Kingdom, by means  of
any document, any Shares other than (a) to persons whose ordinary business it is
to buy or sell shares or debentures, whether as principal or agent, or (b) under

                                       30
<PAGE>
circumstances  which do not constitute an offer to the public within the meaning
of the  Companies Act  1985;  (ii) it  has complied  and  will comply  with  all
applicable  provisions of the Financial Services  Act 1986 (the "1986 Act") with
respect to anything done by it in  relation to the Shares in, from or  otherwise
involving  the United Kingdom;  and (iii) it  has only issued  or passed on, and
will only issue or pass on to  any person in the United Kingdom, any  investment
advertisement  (within the meaning  of the 1986  Act) relating to  the Shares if
that person  falls  within Article  9(3)  of  the Financial  Services  Act  1986
(Investment Advertisements) (exemptions) Order 1988.

    No action has been taken or will be taken in any jurisdiction by the Company
or  the International Managers that would permit a public offering of the shares
offered pursuant to  the Offerings  in any  jurisdiction where  action for  that
purpose is required, other than the United States. Persons into whose possession
this Prospectus comes are required by the Company and the International Managers
to inform themselves about and to observe any restrictions as to the offering of
the  shares  offered pursuant  to  the Offerings  and  the distribution  of this
Prospectus.

    Purchasers of the shares of Common  Stock offered hereby may be required  to
pay  stamp taxes and other charges in  accordance with the laws and practices of
the country of purchase in addition to the offering price set forth on the cover
page hereof.

    The Company and each of Alexander, Derek  and Eric Lidow have agreed not  to
sell or dispose of any shares of Common Stock, with certain exceptions, prior to
the  expiration of 90  days from the  date of this  Prospectus without the prior
written consent of the U.S. Underwriters and International Managers. The Company
has agreed to indemnify the U.S. Underwriters and International Managers against
certain liabilities,  including liabilities  under the  Securities Act,  and  to
contribute to payments that the U.S. Underwriters and the International Managers
may be required to make in respect hereof.

                                 LEGAL OPINIONS

    The  validity of the Common Stock to be issued pursuant to the Offerings and
general corporate legal matters will be passed upon for the Company by O'Melveny
& Myers and for the U.S. Underwriters and the International Managers by Latham &
Watkins.

                                    EXPERTS

    The audited consolidated  financial statements  of the  Company included  in
this  prospectus, have  been audited  by Coopers  & Lybrand  L.L.P., independent
public accountants, as indicated in their  report with respect thereto, and  are
included  herein  in reliance  upon such  report,  which include  an explanatory
paragraph regarding  three outstanding  class action  lawsuits, given  upon  the
authority of said firm as experts in auditing and accounting.

                             AVAILABLE INFORMATION

    The  Company is subject to the  informational requirements of the Securities
Exchange Act  of  1934, as  amended  (the  "Exchange Act")  and,  in  accordance
therewith,  files reports and other information with the Securities and Exchange
Commission (the "Commission"). Reports,  proxy statements and other  information
filed  by  the Company  may  be inspected  and  copied at  the  public reference
facilities maintained by the Commission  at 450 Fifth Street, N.W.,  Washington,
D.C.  20549, as well as  at the following Regional  Offices of the Commission: 7
World Trade Center, Suite  1300, New York, New  York 10048 and Citicorp  Center,
500  West Madison  Street, Suite 1400,  Chicago, Illinois 60661.  Copies of such
material may be obtained from the Public Reference Section of the Commission  at
450  Fifth  Street,  N.W., Washington,  D.C.  20549, at  prescribed  rates. Such
material may also be inspected at the offices of the New York Stock Exchange and
the Pacific Stock Exchange.

    This Prospectus constitutes a part of a Registration Statement filed by  the
Company  with the Commission under the Securities  Act of 1933, as amended. This
Prospectus omits  certain  of  the information  contained  in  the  Registration
Statement,  and  reference  is hereby  made  to the  Registration  Statement and

                                       31
<PAGE>
related exhibits for  further information with  respect to the  Company and  the
Common  Stock. Any statements contained herein  concerning the provisions of any
document are not necessarily complete, and, in each instance, reference is  made
to  the copy of such document filed  as an exhibit to the Registration Statement
or otherwise filed with the Commission. Each such statement is qualified in  its
entirety by such reference.

                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

   
    The  following  documents, which  have been  filed by  the Company  with the
Commission pursuant to the Exchange Act, are hereby incorporated by reference in
this Prospectus:
    

   
        (i) the Company's Annual Report on  Form 10-K for the fiscal year  ended
    June 30, 1994; and
    

   
        (ii)  the Company's Quarterly Report on  Form 10-Q for the quarter ended
    September 30, 1994.
    

    All documents filed by the Company pursuant to Sections 13(a), 13(c), 14  or
15(d) of the Exchange Act subsequent to the date of this Prospectus and prior to
the  termination  of  these offerings  shall  be  deemed to  be  incorporated by
reference into this Prospectus and to be a part hereof from the respective dates
of filing of such documents.

    Any statement contained in a document incorporated by reference herein shall
be deemed to be modified  or superseded for purposes  of this Prospectus to  the
extent  that a  statement contained  herein or  in any  other subsequently filed
document which also is incorporated  by reference herein modifies or  supersedes
such  statement.  Any such  statement  so modified  or  superseded shall  not be
deemed, except  as so  modified or  superseded,  to constitute  a part  of  this
Prospectus.

    The  Company  will  provide  without  charge to  each  person  to  whom this
Prospectus is delivered, upon oral or written  request, a copy of any or all  of
the  foregoing  documents  incorporated  herein  by  reference,  except  for the
exhibits to such documents (unless  such exhibits are specifically  incorporated
by  reference  into  information  that  this  Prospectus  incorporates). Written
requests should be directed to  International Rectifier Corporation, 233  Kansas
Street,  El Segundo, California 90245, Attention: Corporate Secretary. Telephone
requests should be directed to (310) 322-3331.

                                       32
<PAGE>
                                    GLOSSARY

    The  following  are  definitions  of certain  technical  terms  used  in the
Prospectus:

    ASSEMBLY -- The  process of encasing  a semiconductor chip  in a package  to
produce a finished product.

    BIPOLAR TRANSISTOR -- A transistor that is controlled by electrical current.

   
    CONTROL  IC -- A semiconductor  device having logic and  control on the same
chip that is used in conjunction with power MOSFETs or IGBTs.
    

    DIODE -- A discrete device which conducts current in one direction.

    DISCRETE DEVICE --  An electrical  or electronic component  that performs  a
single function.

    FAST  RECOVERY DIODE -- A diode suited to applications above 200 volts where
high switching speed is desirable.

    FET (FIELD  EFFECT  TRANSISTOR)  --  A  transistor  that  is  controlled  by
electrical voltage.

    IGBT  (INSULATED GATE BIPOLAR  TRANSISTOR) -- A variant  of the power MOSFET
that incorporates bipolar transistor technology.

    IC (INTEGRATED CIRCUIT) -- A device  that contains multiple components on  a
single silicon chip to form an electronic circuit.

    PACKAGE -- The external structure that encases a semiconductor chip.

    POWER  MOSFET -- A power field  effect transistor (FET) that is manufactured
using MOS (Metal Oxide Semiconductor) processing technology similar to that used
in manufacturing certain  integrated circuits. The  Company's power MOSFETs  are
sold under the trademark HEXFET.

    POWER  SEMICONDUCTOR -- A  silicon-based component that  operates at a power
level above approximately one watt  and has the ability  both to conduct and  to
block  the flow of electricity. Power semiconductors are used to switch (turn on
and off)  electricity or  to condition  electricity, for  example by  converting
alternating current to direct current.

    RECTIFIER -- A diode used to convert alternating current to direct current.

    SCHOTTKY  DIODE  --  An  ultra-fast  rectifier  for  use  in high-frequency,
low-voltage circuits.

    THYRISTOR (SCR)  --  A four  layer  semiconductor  device that  has  a  gate
structure allowing current to flow in an electrical circuit.

    TRANSISTOR  -- A  semiconductor device that  switches (turns on  and off) or
amplifies electricity in a circuit.

    WAFER FABRICATION --  The sequence  of semiconductor  processing steps  that
creates semiconductor devices on a silicon wafer.

                                       33
<PAGE>
                [ALTERNATE SECTION FOR INTERNATIONAL PROSPECTUS]
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

    NO  DEALER, SALESPERSON OR ANY OTHER PERSON  HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO  MAKE ANY  REPRESENTATIONS NOT CONTAINED  IN THIS  PROSPECTUS,
AND,  IF GIVEN OR MADE,  SUCH INFORMATION OR REPRESENTATIONS  MUST NOT BE RELIED
UPON AS HAVING BEEN  AUTHORIZED BY THE  COMPANY OR BY  ANY OF THE  INTERNATIONAL
MANAGERS.  THIS PROSPECTUS DOES NOT CONSTITUTE  AN OFFER OF ANY SECURITIES OTHER
THAN THOSE TO  WHICH IT RELATES  OR AN OFFER  TO SELL, OR  A SOLICITATION OF  AN
OFFER  TO  BUY,  TO  ANY PERSON  IN  ANY  JURISDICTION WHERE  SUCH  AN  OFFER OR
SOLICITATION WOULD BE UNLAWFUL. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR  ANY
SALE  MADE HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT
THE INFORMATION CONTAINED  HEREIN IS CORRECT  AS OF ANY  TIME SUBSEQUENT TO  THE
DATE HEREOF.

    THERE  ARE RESTRICTIONS ON THE OFFER AND  SALE OF THE SHARES OF COMMON STOCK
OFFERED HEREBY IN THE UNITED KINGDOM. ALL APPLICABLE PROVISIONS OF THE FINANCIAL
SERVICES ACT 1986 AND THE  COMPANIES ACT 1985 WITH  RESPECT TO ANYTHING DONE  BY
ANY  PERSON IN RELATION TO THE COMMON  STOCK IN, FROM OR OTHERWISE INVOLVING THE
UNITED KINGDOM MUST BE COMPLIED WITH. SEE "UNDERWRITING."

    IN THIS PROSPECTUS,  REFERENCES TO "DOLLARS"  AND "$" ARE  TO UNITED  STATES
DOLLARS UNLESS STATED OTHERWISE.

                             ---------------------

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                        Page
                                                         ---
<S>                                                  <C>
Prospectus Summary.................................           3
The Company........................................           5
Risk Factors.......................................           5
Use of Proceeds....................................           8
Capitalization.....................................           8
Price Range of Common Stock........................           9
Dividend Policy....................................           9
Selected Consolidated Financial Data...............          10
Management's Discussion and Analysis of Financial
  Condition and Results of Operations..............          12
Business...........................................          15
Management.........................................          24
Description of Capital Stock.......................          25
Certain United States Federal Tax
  Consequences To Non-United States
  Holders..........................................          27
Underwriting.......................................          29
Legal Opinions.....................................          31
Experts............................................          31
Available Information..............................          31
Incorporation of Certain Documents by Reference....          32
Glossary...........................................          33
Index to Consolidated Financial Statements.........         F-1
</TABLE>

                                4,500,000 SHARES

                                     [LOGO]

                                 INTERNATIONAL
                                   RECTIFIER
                                  CORPORATION

                                  COMMON STOCK

                              -------------------

                                   PROSPECTUS
                                          , 1994

                             ---------------------

                                LEHMAN BROTHERS

                       KIDDER, PEABODY INTERNATIONAL PLC

                             MONTGOMERY SECURITIES

                           PAINEWEBBER INTERNATIONAL

                               SMITH BARNEY INC.

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

    The following is an itemized statement of the estimated expenses, other than
underwriting  discounts and commissions, all  of which were or  will be borne by
the Company:

   
<TABLE>
<CAPTION>
ITEM                                                           AMOUNT
- ------------------------------------------------------------  ---------
<S>                                                           <C>
Registration fee............................................  $  41,155
New York Stock Exchange and Pacific Stock Exchange filing
 fees.......................................................     33,150
NASD fee....................................................     12,435
Blue Sky fees and expenses..................................     10,000
Accounting fees and expenses................................    100,000
Printing and engraving fee..................................    150,000
Legal fees and expenses.....................................    120,000
Transfer agent fees.........................................      2,500
Miscellaneous...............................................      5,760
                                                              ---------
    Total...................................................  $ 475,000
                                                              ---------
                                                              ---------
</TABLE>
    

   
ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.
    

    The Company's bylaws provide for  indemnification of directors and  officers
of  the Company  to the  fullest extent  authorized by  law. Section  145 of the
Delaware General Corporation Law provides  that a corporation may indemnify  any
persons,  including officers  and directors,  who are,  or are  threatened to be
made, parties to  any threatened,  pending or  completed legal  action, suit  or
proceeding, whether civil, criminal, administrative or investigative (other than
an  action by or in the  right of such corporation), by  reason of the fact that
such person  is  or  was  an  officer,  director,  employee  or  agent  of  such
corporation,  or  is or  was serving  at the  request of  such corporation  as a
director, officer, employee or agent  of another corporation or enterprise.  The
indemnity may include expenses (including attorneys' fees), judgments, fines and
amounts  paid in settlement  actually and reasonably incurred  by such person in
connection with such action,  suit or proceeding, if  such person acted in  good
faith  and  in a  manner reasonably  believed to  be  in or  not opposed  to the
corporation's best interests and, with  respect to any criminal proceeding,  had
no  reasonable  cause  to believe  that  his  conduct was  unlawful.  A Delaware
corporation may indemnify  for expenses its  officers, directors, employees  and
agents  in  an action  by or  in the  right  of the  corporation under  the same
conditions,  except  that  no  indemnification  is  permitted  without  judicial
approval if the officer, director, employee or agent is adjudged to be liable to
the  corporation. Where an officer, director, employee or agent is successful on
the merits or  otherwise in the  defense of  any action referred  to above,  the
corporation  must indemnify such person against the expenses which such officer,
director, employee  or  agent actually  and  reasonably incurred  in  connection
therewith.

    The U.S. Underwriting Agreement and the International Underwriting Agreement
provide that the U.S. Underwriters or the International Managers, as applicable,
shall  indemnify each director of  the Company, each officer  of the Company who
signed this Registration Statement and each person who controls the Company  for
certain  liabilities, including certain liabilities  under the Securities Act of
1933.

    The Company maintains an officers' and directors' liability insurance policy
insuring the Company's  officers and directors  against certain liabilities  and
expenses incurred by them in their capacities as such, and insuring the Company,
under certain circumstances, in the event that indemnification payments are made
by the Company to such officers and directors.

                                      II-1
<PAGE>
ITEM 16. EXHIBITS.

    Exhibit Table

   
<TABLE>
<CAPTION>
EXHIBIT
  NO.                           DESCRIPTION
- ------- ------------------------------------------------------------
<C>     <S>                                                           <C>
  1(a)  Form of U.S. Underwriting Agreement.........................
  1(b)  Form of International Underwriting Agreement................
  5     Opinion of O'Melveny & Myers, legal counsel of the
         Company....................................................
*23(a)  Consent of Coopers & Lybrand, independent accountants of the
         Company....................................................
 23(b)  Consent of O'Melveny & Myers, legal counsel of the Company
         (included in Exhibit 5)....................................
*24     Power of Attorney (contained in Part II of the Registration
         Statement).................................................
<FN>
- ------------------------
*Previously filed.
</TABLE>
    

ITEM 17.  UNDERTAKINGS.

    The   undersigned  registrant  hereby  undertakes   that,  for  purposes  of
determining any liability under the Securities  Act of 1933, each filing of  the
registrant's  annual report pursuant to Section 13(a) or 15(d) of the Securities
Exchange Act  of 1934  that is  incorporated by  reference in  the  registration
statement  shall be deemed  to be a  new registration statement  relating to the
securities offered therein,  and the offering  of such securities  at that  time
shall be deemed to be the initial BONA FIDE offering thereof.

    Insofar  as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to  directors, officers and controlling persons of  the
registrant  pursuant  to  the provision  of  Item  15 above,  or  otherwise, the
registrant has been advised that in  the opinion of the Securities and  Exchange
Commission such indemnification is against public policy as expressed in the Act
and  is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the  payment by the registrant of  expenses
incurred  or paid by a director, officer or controlling person of the registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities  being
registered, the registrant will, unless in the opinion of its counsel the matter
has  been settled  by controlling  precedent, submit  to a  court of appropriate
jurisdiction the question whether such  indemnification by it is against  public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.

                                      II-2
<PAGE>
    The undersigned registrant hereby undertakes that:

        (1)  For purposes of determining any  liability under the Securities Act
    of 1933, the information omitted from  the form of prospectus filed as  part
    of this registration statement in reliance upon Rule 430A and contained in a
    form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or (4)
    or  497(h)  under the  Securities Act  shall be  deemed to  be part  of this
    registration statement as of the time it was declared effective.

        (2) For the purpose  of determining any  liability under the  Securities
    Act  of  1933,  each  post-effective  amendment  that  contains  a  form  of
    prospectus shall be deemed  to be a new  registration statement relating  to
    the  securities offered therein, and the offering of such securities at that
    time shall be deemed to be the initial bona fide offering thereof.

                                      II-3
<PAGE>
                                   SIGNATURES

   
    Pursuant  to the requirements of the  Securities Act of 1933, the Registrant
certifies that it has  reasonable grounds to  believe that it  meets all of  the
requirements  for filing on Form S-3 and has duly caused this Amendment No. 1 to
the Registration  Statement to  be  signed on  its  behalf by  the  undersigned,
thereunto  duly authorized, in  the City of  El Segundo, State  of California on
November 16, 1994.
    

                                          INTERNATIONAL RECTIFIER
                                           CORPORATION

   
                                          By:             ERIC LIDOW*
    

                                             -----------------------------------
                                                         Eric Lidow
                                                PRESIDENT AND CHIEF EXECUTIVE
                                                           OFFICER

   
    Pursuant to the requirements of the  Securities Act of 1933, this  Amendment
No.  1 to  the Registration  Statement has  been signed  below by  the following
persons in the capacities and on the dates indicated.
    

   
<TABLE>
<CAPTION>
                   SIGNATURE                                       TITLE                            DATE
- ------------------------------------------------  ---------------------------------------  ----------------------

<C>                                               <S>                                      <C>
                 DONALD S. BURNS*
     --------------------------------------       Director                                   November 16, 1994
                Donald S. Burns

                  GEORGE KRSEK*
     --------------------------------------       Director                                   November 16, 1994
                  George Krsek

                 ALEXANDER LIDOW*
     --------------------------------------       Director, Executive Vice President of      November 16, 1994
                Alexander Lidow                    Operations

                 DEREK B. LIDOW*
     --------------------------------------       Director, Executive Vice President         November 16, 1994
                 Derek B. Lidow

                   ERIC LIDOW*
     --------------------------------------       President, Chief Executive Officer,        November 16, 1994
                   Eric Lidow                      Chairman of the Board
</TABLE>
    

                                      II-4
<PAGE>
   
<TABLE>
<CAPTION>
                   SIGNATURE                                       TITLE                            DATE
- ------------------------------------------------  ---------------------------------------  ----------------------
<C>                                               <S>                                      <C>

              /s/ MICHAEL P. MCGEE
     --------------------------------------       Vice-President, Chief Financial Officer    November 16, 1994
                Michael P. McGee                   and Principal Accounting Officer

              /s/ROBERT J. MUELLER
     --------------------------------------       Director, Executive Vice President         November 16, 1994
               Robert J. Mueller

              /s/JAMES D. PLUMMER
     --------------------------------------       Director                                   November 16, 1994
                James D. Plummer

                  JACK O. VANCE*
     --------------------------------------       Director                                   November 16, 1994
                 Jack O. Vance

                 ROCHUS E. VOGT*
     --------------------------------------       Director                                   November 16, 1994
                 Rochus E. Vogt

          *By:     /s/MICHAEL P. MCGEE
       ----------------------------------
                Michael P. McGee                                                             November 16, 1994
                Attorney-in-Fact
</TABLE>
    

                                      II-5

<PAGE>

                                                                    EXHIBIT 1(a)



                                4,140,000 SHARES

                       INTERNATIONAL RECTIFIER CORPORATION

                                  COMMON STOCK
                                ($1.00 PAR VALUE)

                           U.S. UNDERWRITING AGREEMENT

                                                               November __, 1994

LEHMAN BROTHERS INC.
KIDDER, PEABODY & CO. INCORPORATED
MONTGOMERY SECURITIES
PAINEWEBBER INCORPORATED
SMITH BARNEY INC.
As Representatives of the several
  Underwriters named in Schedule 1,
c/o Lehman Brothers Inc.
Three World Financial Center
New York, New York 10285

Dear Sirs:

          International Rectifier Corporation, a Delaware corporation (the
"Company"), proposes to sell 3,600,000 shares (the "Firm Stock") of the
Company's Common Stock, par value $1.00 per share (the "Common Stock") through
arrangements with certain U.S. Underwriters named in Schedule 1 hereto (the
"U.S. Underwriters").  In addition, the Company proposes to grant to the U.S.
Underwriters an option to purchase up to an additional 540,000 shares of the
Common Stock on the terms and for the purposes set forth in Section 2 (the
"Option Stock").  The Firm Stock and the Option Stock, if purchased, are
hereinafter collectively called the "Stock" by the U.S. Underwriters.

          It is understood by all parties that the Company is concurrently
entering into an agreement dated the date hereof (the "International
Underwriting Agreement") providing for the sale by the Company of 900,000 shares
of Common Stock (the "International Stock") through arrangements with certain
underwriters outside the United States (the "International Managers"), for whom
Lehman Brothers International (Europe), Kidder, Peabody International PLC,
Montgomery Securities, PaineWebber International (U.K.) Ltd. and Smith Barney
Inc. are acting

<PAGE>

as lead managers.  In addition, the Company proposes to grant to the
International Managers an option to purchase up to an additional 135,000 shares
of the Common Stock on the terms and for the purposes set forth in Section 2.

     The U.S. Underwriters and the International Managers simultaneously are
entering into an agreement between the U.S. and international underwriting
syndicates (the "Agreement Between U.S. Underwriters and International
Managers") which provides for, among other things, the transfer of shares of
Common Stock between the two syndicates.  Two forms of prospectus are to be used
in connection with the offering and sale of shares of Common Stock contemplated
by the foregoing, one relating to the Firm Stock and the other relating to the
International Stock.  The latter form of prospectus will be identical to the
former except for certain substitute pages as included in the registration
statement and amendments thereto referred to below.  Except as used in Sections
2, 3, 4, 9, and 10 herein, and except as the context may otherwise require,
references herein to the Stock shall include all the shares of which may be sold
pursuant to either this Agreement or the International Underwriting Agreement,
and references herein to any prospectus whether in preliminary or final form,
and whether as amended or supplemented, shall include both the U.S. and the
international versions thereof.

          1.   REPRESENTATIONS, WARRANTIES AND AGREEMENTS OF THE COMPANY.  The
Company represents, warrants and agrees that:

               (a)  A registration statement on Form S-3 with respect to the
          Stock has (i) been prepared by the Company in conformity with the
          requirements of the United States Securities Act of 1933 (the
          "Securities Act") and the rules and regulations (the "Rule and
          Regulations") of the United States Securities and Exchange Commission
          (the "Commission") thereunder, (ii) been filed with the Commission
          under the Securities Act and (iii) become effective under the
          Securities Act.  Copies of such registration statement and all
          amendments thereto have been delivered by the Company to you as the
          representatives (the "Representatives") of the U.S. Underwriters.  As
          used in this Agreement, "Effective Time" means the date and the time
          as of which such registration statement, or the most recent post-
          effective amendment thereto, if any, was declared effective by the
          Commission; "Effective Date" means the date of the Effective Time;
          "Preliminary Prospectus" means each prospectus included in such
          registration statement, or amendments thereof, before it became
          effective under the Securities Act and any prospectus filed with the
          Commission by the Company with the consent of the Representatives
          pursuant to Rule 424(a) of the Rules and Regulations; "Registration
          Statement" means such registration statement, as amended at the
          Effective Time, including any documents incorporated by reference
          therein at such time and all information contained in the final
          prospectus filed with the Commission pursuant to Rule 424(b) of the
          Rules and Regulations in accordance with Section 5(a) hereof and
          deemed to be a part of the registration statement as of the Effective
          Time pursuant to paragraph (b) of Rule 430A of the Rules and
          Regulations; and "Prospectus" means such final prospectus, as first


                                        2
<PAGE>

          filed with the Commission pursuant to paragraph (1) or (4) of Rule
          424(b) of the Rules and Regulations.  Reference made herein to any
          Preliminary Prospectus or to the Prospectus shall be deemed to refer
          to and include any documents incorporated by reference therein
          pursuant to Item 12 of Form S-3 under the Securities Act, as of the
          date of such Preliminary Prospectus or the Prospectus, as the case may
          be, and any reference to any amendment or supplement to any
          Preliminary Prospectus or the Prospectus shall be deemed to refer to
          and include any document filed under the United States Securities
          Exchange Act of 1934 (the "Exchange Act") after the date of such
          Preliminary Prospectus or the Prospectus, as the case may be, and
          incorporated by reference in such Preliminary Prospectus or the
          Prospectus, as the case may be; and any reference to any amendment to
          the Registration Statement shall be deemed to include any annual
          report of the Company filed with the Commission pursuant to Section
          13(a) or 15(d) of the Exchange Act after the Effective Time that is
          incorporated by reference in the Registration Statement.  The
          Commission has not issued any order preventing or suspending the use
          of any Preliminary Prospectus.

               (b)  The Registration Statement conforms, and the Prospectus and
          any further amendments or supplements to the Registration Statement or
          the Prospectus will, when they become effective or are filed with the
          Commission, as the case may be, conform in all material respects to
          the requirements of the Securities Act and the Rules and Regulations
          and will not, as of the applicable effective date (as to the
          Registration Statement and any amendment thereto) and as of the
          applicable filing date (as to the Prospectus and any amendment or
          supplement thereto) contain an untrue statement of a material fact or
          omit to state a material fact required to be stated therein or
          necessary to make the statements therein not misleading; PROVIDED that
          no representation or warranty is made as to information contained in
          or omitted from the Registration Statement or the Prospectus in
          reliance upon and in conformity with written information furnished to
          the Company through the Representatives by or on behalf of any U.S.
          Underwriter specifically for inclusion therein.

               (c)  The documents incorporated by reference in the Prospectus,
          when they became effective or were filed with the Commission, as the
          case may be, conformed in all material respects to the requirements of
          the Exchange Act and the rules and regulations of the Commission
          thereunder, and none of such documents contained an untrue statement
          of a material fact or omitted to state a material fact required to be
          stated therein or necessary to make the statements therein not
          misleading.

               (d)  The Company and each of its Significant Subsidiaries (as
          defined in Section 1(s)) have been duly incorporated and are validly
          existing as corporations in good standing under the laws of their
          respective jurisdictions of incorporation, are duly qualified to do
          business and are in good standing as


                                        3
<PAGE>

          foreign corporations in each jurisdiction in which their respective
          ownership or lease of property or the conduct of their respective
          businesses requires such qualification (except where the failure to be
          so qualified, considering all such cases in the aggregate, does not
          involve a material risk to the business, properties, financial
          position or results of operations of the Company and its subsidiaries
          taken as a whole), and have all power and authority necessary to own
          or hold their respective properties and to conduct the businesses in
          which they are engaged; and none of the subsidiaries of the Company is
          a "significant subsidiary," as such term is defined in Rule 405 of the
          Rules and Regulations, except as set forth in Section 1(s) below.

               (e)  The Company has an authorized capitalization as set forth in
          the Prospectus, and all of the issued shares of capital stock of the
          Company have been duly and validly authorized and issued, are fully
          paid and non-assessable and conform to the description thereof
          contained in the Prospectus; and all of the issued shares of capital
          stock of each subsidiary of the Company have been duly and validly
          authorized and issued and are fully paid and non-assessable and
          (except for directors' qualifying shares) are owned directly or
          indirectly by the Company, free and clear of all liens, encumbrances,
          equities or claims.

               (f)  The unissued shares of the Stock to be issued and sold by
          the Company to the U.S. Underwriters hereunder and to the
          International Managers under the International Underwriting Agreement
          have been duly and validly authorized and, when issued and delivered
          against payment therefor as provided herein and in the International
          Underwriting Agreement, will be duly and validly issued, fully paid
          and non-assessable; and the Stock will conform to the description
          thereof contained in the Prospectus.

               (g)  This Agreement has been duly authorized, executed and
          delivered by the Company.

               (h)  The Company and each of its subsidiaries have complied in
          all respects with all laws, regulations and orders applicable to them
          or their respective businesses, the violation of which would have a
          material adverse effect upon the business, properties, financial
          condition or earnings of the Company and its subsidiaries taken as a
          whole, and neither the Company nor any of its subsidiaries is in
          default under any indenture, mortgage, deed of trust, voting trust
          agreement, loan agreement, bond, debenture, note agreement or other
          evidence of indebtedness, lease, contract or other agreement or
          instrument to which any of them is a party or by which any of them or
          any of their respective properties are bound, which default would
          individually or in the aggregate have a material adverse effect on the
          Company and its subsidiaries taken as a whole, and no other party
          under any such agreement or instrument to which the Company or any of
          its subsidiaries is a party is, to the knowledge of the




                                         4


<PAGE>


          Company, in default in any material respect thereunder, and
          neither the Company nor any of its subsidiaries is in violation of its
          respective charter or bylaws, as the case may be.

               (i)  The execution, delivery and performance of this Agreement
          and the International Underwriting Agreement by the Company and the
          consummation of the transactions contemplated hereby will not conflict
          with or result in a breach or violation of any of the terms or
          provisions of, or constitute a default under, any indenture, mortgage,
          deed of trust, loan agreement or other agreement or instrument to
          which the Company or any of its subsidiaries is a party or by which
          the Company or any of its subsidiaries is bound or to which any of the
          property or assets of the Company or any of its subsidiaries is
          subject, nor will such actions result in any violation of the
          provisions of the charter or by-laws of the Company or any of its
          subsidiaries or any statute or any order, rule or regulation of any
          court or governmental agency or body having jurisdiction over the
          Company or any of its subsidiaries or any of their properties or
          assets; and except for the registration of the Stock under the
          Securities Act and such consents, approvals, authorizations,
          registrations or qualifications as may be required under the Exchange
          Act and applicable state or foreign securities laws in connection with
          the purchase and distribution of the Stock by the U.S. Underwriters
          and the International Managers, no consent, approval, authorization or
          order of, or filing or registration with, any such court or
          governmental agency or body is required for the execution, delivery
          and performance of this Agreement, or the International Underwriting
          Agreement by the Company and the consummation of the transactions
          contemplated hereby.

               (j)  There are no contracts, agreements or understandings between
          the Company and any person granting such person the right to require
          the Company to file a registration statement under the Securities Act
          with respect to any securities of the Company owned or to be owned by
          such person or to require the Company to include such securities in
          the securities registered pursuant to the Registration Statement.

               (k)  Except as described in the Prospectus, the Company has not
          sold or issued any shares of Common Stock during the six-month period
          preceding the date of the Prospectus, including any sales pursuant to
          Rule 144A under, or Regulations D or S of, the Securities Act other
          than shares issued pursuant to employee benefit plans, qualified stock
          options plans or other employee compensation plans or pursuant to
          outstanding options, rights or warrants.

               (l)  Neither the Company nor any of its subsidiaries has
          sustained, since the date of the latest audited financial statements
          included or incorporated by reference in the Prospectus, any material
          loss or interference with its business from fire, explosion, flood or
          other calamity, whether or not covered by


                                        5
<PAGE>

          insurance, or from any labor dispute or court or governmental action,
          order or decree, otherwise than as set forth or contemplated in the
          Prospectus; and, since such date, there has not been any change in the
          capital stock or long-term debt of the Company or any of its
          subsidiaries, other than in the ordinary course of business that is
          material to the Company and its subsidiaries taken as a whole, or any
          material adverse change, or any development involving a prospective
          material adverse change, in or affecting the general affairs,
          management, financial position, stockholders' equity or results of
          operations of the Company and its subsidiaries, otherwise than as set
          forth or contemplated in the Prospectus.

               (m)  The financial statements including the related notes and
          supporting schedules filed as part of the Registration Statement or
          included or incorporated by reference in the Prospectus present fairly
          the financial condition and results of operations of the entities
          purported to be shown thereby, at the dates and for the periods
          indicated, and have been prepared in conformity with generally
          accepted accounting principles applied on a consistent basis
          throughout the periods involved.

               (n)  The Company and each of its subsidiaries have good and
          marketable title in fee simple to all real property and good and
          marketable title to all personal property owned by them, in each case
          free and clear of all liens, encumbrances and defects except such as
          are described in the Prospectus or such as do not materially affect
          the value of such property and do not materially interfere with the
          use made and proposed to be made of such property by the Company and
          its subsidiaries; and all real property and buildings held under lease
          by the Company and its subsidiaries are held by them under valid,
          subsisting and enforceable leases, with such exceptions as are not
          material and do not interfere with the use made and proposed to be
          made of such property and buildings by the Company and its
          subsidiaries.

               (o)  Except to the extent that legal proceedings between the
          Company and SGS-Thomson Microelectronics, Inc., as disclosed in the
          Prospectus, are resolved on a materially adverse basis to the Company,
          each of the Company and its subsidiaries have sufficient trademarks,
          trade names, registered service marks, patent rights, licenses,
          permits, copyright protection and similar governmental authorizations
          currently required for the conduct of the Company's business, and the
          Company and each of its subsidiaries, as the case may be, is in all
          material respects complying therewith; other than as disclosed in the
          Prospectus, the expiration of any such trademarks, trade names,
          registered service marks, patent rights, licenses, permits, copyrights
          and similar governmental authorization would not materially adversely
          affect the condition (financial or otherwise), business, results of
          operations or prospects of the Company and its subsidiaries taken as a
          whole; and, except as disclosed in the Prospectus, or in writing by
          the Company to the Representatives of the several U.S. Underwriters,
          neither the Company nor


                                        6
<PAGE>

          any subsidiary has received any notice of violation or infringement of
          or conflict with asserted rights of others with respect to any
          trademarks, trade names, registered service marks, patent rights,
          licenses or copyrights.

               (p)  Except as described in the Prospectus, there are no legal or
          governmental proceedings pending to which the Company or any of its
          subsidiaries is a party or of which any property or assets of the
          Company or any of its subsidiaries is the subject which, if determined
          adversely to the Company or any of its subsidiaries, might have a
          material adverse effect on the consolidated financial position,
          stockholders' equity, results of operations, business or prospects of
          the Company and its subsidiaries; and to the best of the Company's
          knowledge, no such proceedings are threatened or contemplated by
          governmental authorities or threatened by others.

               (q)  There are no contracts or other documents which are required
          to be described in the Prospectus or filed as exhibits to the
          Registration Statement by the Securities Act or by the Rules and
          Regulations which have not been described in the Prospectus or filed
          as exhibits to the Registration Statement or incorporated therein by
          reference as permitted by the Rules and Regulations.

               (r)  Neither the Company nor any subsidiary is an "investment
          company" within the meaning of such term under the United States
          Investment Company Act of 1940 and the rules and regulations of the
          Commission thereunder.

               (s)  The only significant subsidiaries of the Company, as such
          term is defined in Rule 405 of the Rules and Regulations, are
          International Rectifier Company (Great Britain) Limited and
          International Rectifier Corporation Italiana S.p.A., (the "Significant
          Subsidiaries").

          2.   PURCHASE OF THE STOCK BY THE U.S. UNDERWRITERS.  On the basis of
the representations and warranties contained in, and subject to the terms and
conditions of, this Agreement, the Company agrees to sell the Firm Stock to the
several U.S. Underwriters and each of the U.S. Underwriters, severally and not
jointly, agrees to purchase the number of shares of the Firm Stock set forth
opposite that U.S. Underwriter's name in Schedule 1 hereto.  The respective
purchase obligations of the U.S. Underwriters with respect to the Firm Stock
shall be rounded among the U.S. Underwriters to avoid fractional shares, as the
Representatives may determine.

          In addition, the Company grants to the U.S. Underwriters an option to
purchase up to 540,000 shares of Option Stock.  Such option is granted solely
for the purpose of covering over-allotments in the sale of Firm Stock and is
exercisable as provided in Section 4 hereof.  Shares of Option Stock shall be
purchased severally for the account of the U.S. Underwriters in proportion to
the number of shares of Firm Stock set forth opposite the name of such U.S.


                                        7
<PAGE>

Underwriters in Schedule 1 hereto.  The respective purchase obligations of each
U.S. Underwriter with respect to the Option Stock shall be adjusted by the
Representatives so that no U.S. Underwriter shall be obligated to purchase
Option Stock other than in 100 share amounts.  The price of both the Firm Stock
and any Option Stock shall be $____ per share.

          The Company shall not be obligated to deliver any of the Stock to be
delivered on the First Delivery Date or the Second Delivery Date (as hereinafter
defined), as the case may be, except upon payment for all the Stock to be
purchased on such Delivery Date as provided herein and in the International
Underwriting Agreement.

          3.  OFFERING OF STOCK BY THE U.S. UNDERWRITERS.  Upon authorization by
the Representatives of the release of the Firm Stock, the several U.S.
Underwriters propose to offer the Firm Stock for sale upon the terms and
conditions set forth in the Prospectus.

          Each U.S. Underwriter agrees that, except to the extent permitted by
the Agreement Between U.S. Underwriters and International Managers, it will not
offer or sell any of the Stock outside of the United States or Canada.

          4.  DELIVERY OF AND PAYMENT FOR THE STOCK.  Delivery of the Firm Stock
shall made at the office of Lehman Brothers Inc., New York, New York and payment
for the Firm Stock shall be made at the office of [Latham & Watkins], Los
Angeles, California at 10:00 A.M., New York City time, on the fifth full
business day following the date of this Agreement or at such other date or place
as shall be determined by agreement between the Representatives and the Company.
This date and time are sometimes referred to as the "First Delivery Date."  On
the First Delivery Date, the Company shall deliver or cause to be delivered
certificates representing the Firm Stock to the Representatives for the account
of each U.S. Underwriter against payment to or upon the order of the Company of
the purchase price by certified or official bank check or checks payable in
Clearing House (next-day) funds.  Time shall be of the essence, and delivery at
the time and place specified pursuant to this Agreement is a further condition
of the obligation of each U.S. Underwriter hereunder.  Upon delivery, the Firm
Stock shall be registered in such names and in such denominations as the
Representatives shall request in writing not less than two full business days
prior to the First Delivery Date.  For the purpose of expediting the checking
and packaging of the certificates for the Firm Stock, the Company shall make the
certificates representing the Firm Stock available for inspection by the
Representatives in New York, New York, not later than 2:00 P.M., New York City
time, on the business day prior to the First Delivery Date.

          At any time on or before the thirtieth day after the date of this
Agreement the option granted in Section 2 may be exercised by written notice
being given to the Company by the Representatives.  Such notice shall set forth
the aggregate number of shares of  Option Stock as to which the option is being
exercised, the names in which the shares of Option Stock are to be registered,
the denominations in which the shares of Option Stock are to be issued and the
date and time, as determined by the Representatives, when the shares of Option
Stock are to be delivered; PROVIDED, HOWEVER, that this date and time shall not
be earlier than the First Delivery


                                        8
<PAGE>

Date nor earlier than the second business day after the date on which the option
shall have been exercised nor later than the fifth business day after the date
on which the option shall have been exercised.  The date and time the shares of
Option Stock are delivered are sometimes referred to as the "Second Delivery
Date" and the First Delivery Date and the Second Delivery Date are sometimes
each referred to as a "Delivery Date."

          Delivery of and payment for the Option Stock shall be made at the
place specified in the first sentence of the first paragraph of this Section 4
(or at such other place as shall be determined by agreement between the
Representatives and the Company) at 10:00 A.M., New York City time, on the
Second Delivery Date.  On the Second Delivery Date, the Company shall deliver or
cause to be delivered the certificates representing the Option Stock to the
Representatives for the account of each U.S. Underwriter against payment to or
upon the order of the Company of the purchase price by certified or official
bank check or checks payable in New York Clearing House (next-day) funds.  Time
shall be of the essence, and delivery at the time and place specified pursuant
to this Agreement is a further condition of the obligation of each U.S.
Underwriter hereunder.  Upon delivery, the Option Stock shall be registered in
such names and in such denominations as the Representatives shall request in the
aforesaid written notice.  For the purpose of expediting the checking and
packaging of the certificates for the  Option Stock, the Company shall make the
certificates representing the Option Stock available for inspection by the
Representatives in New York, New York, not later than 2:00 P.M., New York City
time, on the business day prior to the Second Delivery Date.

          5.  FURTHER AGREEMENTS OF THE COMPANY.  The Company agrees:

                         (a)  To prepare the Prospectus in a form approved by
          the Representatives and to file such Prospectus pursuant to Rule
          424(b) under the Securities Act not later than the Commission's close
          of business on the second business day following the execution and
          delivery of this Agreement or, if applicable, such earlier time as may
          be required by Rule 430A(a)(3) under the Securities Act; to make no
          further amendment or any supplement to the Registration Statement or
          to the Prospectus prior to the last Delivery Date except as permitted
          herein; to advise the Representatives, promptly after it receives
          notice thereof, of the time when any amendment to the Registration
          Statement has been filed or becomes effective or any supplement to the
          Prospectus or any amended Prospectus has been filed and to furnish the
          Representatives with copies thereof; to file promptly all reports and
          any definitive proxy or information statements required to be filed by
          the Company with the Commission pursuant to Section 13(a), 13(c), 14
          or 15(d) of the Exchange Act subsequent to the date of the Prospectus
          and for so long as the delivery of a prospectus is required in
          connection with the offering or sale of the Stock; to advise the
          Representatives, promptly after it receives notice thereof, of the
          issuance by the Commission of any stop order or of any order
          preventing or suspending the use of any Preliminary Prospectus or the
          Prospectus, of the suspension of the qualification of the Stock for
          offering or sale in any jurisdiction, of the initiation or threatening



                                        9
<PAGE>

          of any proceeding for any such purpose, or of any request by the
          Commission for the amending or supplementing of the Registration
          Statement or the Prospectus or for additional information; and, in the
          event of the issuance of any stop order or of any order preventing or
          suspending the use of any Preliminary Prospectus or the Prospectus or
          suspending any such qualification, to use promptly its best efforts to
          obtain its withdrawal;

                         (b)  To furnish promptly to each of the Representatives
          and to counsel for the U.S. Underwriters a signed copy of the
          Registration Statement as originally filed with the Commission, and
          each amendment thereto filed with the Commission, including all
          consents and exhibits filed therewith;

                         (c)  To deliver promptly to the Representatives such
          number of the following documents as the Representatives shall
          reasonably request:  (i) conformed copies of the Registration
          Statement as originally filed with the Commission and each amendment
          thereto (in each case excluding exhibits other than this Agreement and
          the computation of per share earnings), (ii) each Preliminary
          Prospectus, the Prospectus and any amended or supplemented Prospectus
          and (iii) any document incorporated by reference in the Prospectus
          (excluding exhibits thereto; and, if the delivery of a prospectus is
          required at any time after the Effective Time in connection with the
          offering or sale of the Stock or any other securities relating thereto
          and if at such time any events shall have occurred as a result of
          which the Prospectus as then amended or supplemented would include an
          untrue statement of a material fact or omit to state any material fact
          necessary in order to make the statements therein, in the light of the
          circumstances under which they were made when such Prospectus is
          delivered, not misleading, or, if for any other reason it shall be
          necessary to amend or supplement the Prospectus or to file under the
          Exchange Act any document incorporated by reference in the Prospectus
          in order to comply with the Securities Act or the Exchange Act, to
          notify the Representatives and, upon their request, to file such
          document and to prepare and furnish without charge to each U.S.
          Underwriter and to any dealer in securities as many copies as the
          Representatives may from time to time reasonably request of an amended
          or supplemented Prospectus which will correct such statement or
          omission or effect such compliance.

                         (d)  To file promptly with the Commission any amendment
          to the Registration Statement or the Prospectus or any supplement to
          the Prospectus that may, in the judgment of the Company or the
          Representatives, be required by the Securities Act or requested by the
          Commission;

                         (e)  Prior to filing with the Commission any amendment
          to the Registration Statement or supplement to the Prospectus, any
          document incorporated by reference in the Prospectus or any Prospectus
          pursuant to Rule


                                       10
<PAGE>

          424 of the Rules and Regulations, to furnish a copy thereof to the
          Representatives and counsel for the U.S. Underwriters and obtain the
          consent of the Representatives to the filing;

                         (f)  As soon as practicable after the Effective Date,
          but in any event not later than fifteen months after the end of the
          Company's current fiscal quarter, to make generally available to the
          Company's security holders and to deliver to the Representatives an
          earnings statement of the Company and its subsidiaries (which need not
          be audited) complying with Section 11(a) of the Securities Act and the
          Rules and Regulations (including, at the option of the Company, Rule
          158);

                         (g)  For a period of five years following the Effective
          Date, to furnish to the Representatives copies of all materials
          furnished by the Company to its shareholders and all public reports
          and all reports and financial statements furnished by the Company to
          the principal national securities exchange upon which the Common Stock
          may be listed pursuant to requirements of or agreements with such
          exchange or to the Commission pursuant to the Exchange Act or any rule
          or regulation of the Commission thereunder;

                         (h)  Promptly from time to time to take such action as
          the Representatives may reasonably request to qualify the Stock for
          offering and sale under the securities laws of such jurisdictions as
          the Representatives may request and to comply with such laws so as to
          permit the continuance of sales and dealings therein in such
          jurisdictions for as long as may be necessary to complete the
          distribution of the Stock PROVIDED that in connection therewith the
          Company shall not be required to qualify as a foreign corporation or
          to file a general consent to service of process in any jurisdiction;

               (i)  For a period of 90 days from the date of the Prospectus, not
          to offer for sale, sell or otherwise dispose of (or enter into any
          transaction which is designed to, or could be expected to, result in
          the disposition by any person of), directly or indirectly, any shares
          of Common Stock (other than the Stock and shares issued pursuant to
          employee benefit plans, qualified stock option plans or other employee
          compensation plans existing on the date hereof or pursuant to
          currently outstanding options, warrants or rights), or sell or grant
          options, rights or warrants with respect to any shares of Common Stock
          (other than the grant of options pursuant to option plans existing on
          the date hereof), without the prior written consent of Lehman Brothers
          Inc.;

               (j)  Prior to the Effective Date, to apply for the inclusion of
          the Stock on the New York and Pacific Stock Exchanges, Inc. and to use
          its best efforts to complete that listing, subject only to official
          notice of issuance and evidence of satisfactory distribution, prior to
          the First Delivery Date;


                                       11
<PAGE>

               (k)  To apply the net proceeds from the sale of the Stock being
          sold by the Company as set forth in the Prospectus; and

               (l)  To take such steps as shall be necessary to ensure that
          neither the Company nor any subsidiary shall become an "investment
          company" within the meaning of such term under the United States
          Investment Company Act of 1940 and the rules and regulations of the
          Commission thereunder.

          6.  EXPENSES.  The Company agrees to pay (a) the costs incident to the
authorization, issuance, sale and delivery of the Stock and any taxes payable in
that connection; (b) the costs incident to the preparation, printing and filing
under the Securities Act of the Registration Statement and any amendments and
exhibits thereto; (c) the costs of distributing the Registration Statement as
originally filed and each amendment thereto and any post-effective amendments
thereof (including, in each case, exhibits), any Preliminary Prospectus, the
Prospectus and any amendment or supplement to the Prospectus or any document
incorporated by reference therein, all as provided in this Agreement; (d) the
costs of printing and distributing this Agreement, the Agreement Between U.S.
Underwriters and International Managers, any Supplemental Agreement Among U.S.
Underwriters and any other related documents in connection with the offering,
purchase, sale and delivery of the stock; (e) the filing fees incident to
securing any required review by the National Association of Securities Dealers,
Inc. of the terms of sale of the Stock; (f) any applicable listing or other
fees; (g) the fees and expenses (not in excess, in the aggregate, of $10,000.00)
of qualifying the Stock under the securities laws of the several jurisdictions
as provided in Section 5(h) and of preparing, printing and distributing a Blue
Sky Memorandum (including related fees and expenses of counsel to the
Underwriters); and (h) all other costs and expenses incident to the performance
of the obligations of the Company under this Agreement; PROVIDED that, except as
provided in this Section 6 and in Section 11 the U.S. Underwriters shall pay
their own costs and expenses, including the costs and expenses of their counsel,
any transfer taxes on the Stock which they may sell and the expenses of
advertising any offering of the Stock made by the U.S. Underwriters.

          7.  CONDITIONS OF U.S. UNDERWRITERS' OBLIGATIONS.  The respective
obligations of the U.S. Underwriters hereunder are subject to the accuracy, when
made and on each Delivery Date, of the representations and warranties of the
Company contained herein, to the performance by the Company of its obligations
hereunder, and to each of the following additional terms and conditions:

                         (a)  The Prospectus shall have been timely filed with
          the Commission in accordance with Section 5(a); no stop order
          suspending the effectiveness of the Registration Statement or any part
          thereof shall have been issued and no proceeding for that purpose
          shall have been initiated or threatened by the Commission; and any
          request of the Commission for inclusion of additional information in
          the Registration Statement or the Prospectus or otherwise shall have
          been complied with.


                                       12
<PAGE>

                         (b)  No U.S. Underwriter or International Manager shall
          have discovered and disclosed to the Company on or prior to such
          Delivery Date that the Registration Statement or the Prospectus or any
          amendment or supplement thereto contains an untrue statement of a fact
          which, in the opinion of Latham & Watkins, counsel for the U.S.
          Underwriters and International Managers, is material or omits to state
          a fact which, in the opinion of such counsel, is material and is
          required to be stated therein or is necessary to make the statements
          therein not misleading.

                         (c)  All corporate proceedings and other legal matters
          incident to the authorization, form and validity of this Agreement,
          the International Underwriting Agreement, the Stock, the Registration
          Statement and the Prospectus, and all other legal matters relating to
          this Agreement and the transactions contemplated hereby shall be
          reasonably satisfactory in all material respects to counsel for the
          U.S. Underwriters, and the Company shall have furnished to such
          counsel all documents and information that they may reasonably request
          to enable them to pass upon such matters.

                         (d)  O'Melveny & Myers shall have furnished to the
          Representatives their written opinion, as counsel to the Company,
          addressed to the U.S. Underwriters and dated such Delivery Date, in
          form and substance reasonably satisfactory to the Representatives, to
          the effect that:

                              (i)  The Company has been duly incorporated and is
               an existing corporation in good standing under the laws of its
               jurisdiction of incorporation and has full corporate power and
               authority to conduct its business as described in the
               Registration Statement and the Prospectus;

                              (ii)  The shares of Stock have been duly
               authorized and validly issued, are fully paid and non-assessable
               and conform to the description thereof in the Prospectus; and the
               shareholders of the Company have no preemptive rights with
               respect to the shares of Stock being issued and sold by the
               Company hereunder;

                              (iii)  The Registration Statement has become
               effective under the Act, the Prospectus has been filed as
               required by Section 1(a) hereof, and to the knowledge of such
               counsel no stop order suspending the effectiveness of the
               Registration Statement has been issued and no proceeding for that
               purpose has been instituted or threatened by the Commission;

                              (iv) Each part of the registration statement, when
               such part became effective, and the Prospectus and any amendment
               or


                                       13
<PAGE>

               supplement thereto, on the date of filing thereof with the
               Commission and at the Delivery Date, appeared on their face to
               comply as to form in all material respects with the requirements
               of the Securities Act and the Rules and Regulations, and the
               documents incorporated by reference in the Registration Statement
               or the Prospectus or any amendment or supplement thereto, when
               they became effective under the Securities Act or were filed with
               the Commission under the Exchange Act, as the case may be, in
               either case to the extent amended, appeared on their face to
               comply as to form in all material respects with the requirements
               of the Securities Act or the Exchange Act, as applicable, and the
               rules and regulations of the Commission thereunder, it being
               understood that such counsel need express no opinion as to the
               financial statements or other financial data included or required
               to be included in any of the documents mentioned in this clause;

                              (v)  The descriptions in the Registration
               Statement and the Prospectus of statutes, legal and governmental
               proceedings, contracts and other documents are accurate and
               fairly present the information required to be shown; and such
               counsel do not know of any statutes or legal or governmental
               proceedings required to be described in the Prospectus that are
               not described as required, or of any contracts or documents of a
               character required to be described in the Registration Statement
               or the Prospectus (or required to be filed under the Exchange Act
               if upon such filing they would be incorporated by reference
               therein) or to be filed as exhibits to the Registration Statement
               that are not described or filed as required; and

                              (vi)  This Agreement and the International
               Underwriting Agreement have been duly authorized, executed and
               delivered by the Company, the performance of this Agreement and
               the International Underwriting Agreement and the consummation of
               the transactions herein and therein contemplated (except for the
               provisions of Section 8 herein and therein as to which no opinion
               need be expressed) will not result in a breach or violation of
               any of the terms and provisions of, or constitute a default
               under, any statute, any agreement or instrument known to such
               counsel to which the Company is a party or by which it is bound
               or to which any of the property of the Company is subject, the
               Company's charter or by-laws, or any order, rule or regulation
               known to such counsel of any court or governmental agency or body
               having jurisdiction over the Company or any of its properties;
               and no consent, approval, authorization or order of, or filing
               with, any court or governmental agency or body is required for
               the consummation of the transactions contemplated by this
               Agreement and the International Underwriting Agreement in
               connection with the issuance or sale of the


                                       14
<PAGE>

               shares of Stock to be sold by the Company, except such as have
               been obtained under the Securities Act and such as may be
               required under state or foreign securities laws in connection
               with the purchase and distribution of such shares of Stock by the
               U.S. Underwriters or the International Managers.

                    In addition, such counsel shall state that in connection
          with its participation in the preparation of the Registration
          Statement and the Prospectus and any amendment or supplement thereto
          it has not independently verified the accuracy, completeness or
          fairness of the statements contained therein, and the limitations
          inherent in the examination made by such counsel and the knowledge
          available to it are such that they are unable to assume, and do not
          assume, any responsibility for the accuracy, completeness or fairness
          of the statements contained in the Registration Statement or the
          Prospectus and any amendment or supplement thereto; however, on the
          basis of their examination and participation in conferences at which
          the contents of the Registration Statement and the Prospectus and any
          amendment or supplement thereto and related matters were discussed,
          such counsel has no reason to believe that either any part of the
          registration statement, when such part became effective, or the
          Prospectus and any amendment or supplement thereto, on the date of
          filing thereof with the Commission or at the Delivery Date, included
          an untrue statement of a material fact or omitted to state a material
          fact necessary to make the statements therein, in the light of the
          circumstances under which they were made, not misleading, it being
          understood that such counsel need express no opinion as to the
          financial statements or other financial data included or required to
          be included in any of the documents mentioned in this paragraph.

                    Such counsel need not express any opinion as to the
          availability of equitable remedies or as to laws other than California
          and federal law and the corporate law of the State of Delaware.  In
          giving such opinion, such counsel may rely on certificates of public
          officials and officers of the Company as to matters of fact, in which
          case the opinion shall state that such counsel has no reason to
          believe that they and the U.S. Underwriters are not entitled to so
          rely on such certificates.

                         (e)  Counsel for each Significant Subsidiary shall
          have furnished to the Representatives their written opinion addressed
          to the U.S. Underwriters and dated such Delivery Date, in form and
          substance reasonably satisfactory to the Representatives, to the
          effect that:

                              (i)  Such Significant Subsidiary is a corporation
               duly organized, validly existing and in good standing under the
               laws of the jurisdiction of its incorporation.  Such Significant
               Subsidiary has the corporate power and authority to conduct all
               of the activities conducted by


                                       15
<PAGE>

               it, to own or lease all of the assets owned or leased by it and
               to conduct its business as described in the Registration
               Statement and the Prospectus; and is duly licensed or qualified
               to do business and in good standing as a foreign corporation in
               all jurisdictions in which the nature of the activities conducted
               by it and/or the character of the assets owned and leased by it
               makes such license or qualification necessary, except for those
               failures to be so qualified or licensed or in good standing which
               will not have a material adverse effect on such Significant
               Subsidiary.

                              (ii) The execution and delivery of this Agreement
               and the International Underwriting Agreement by the Company, the
               consummation by the Company of the transactions herein and
               therein contemplated and the compliance with the terms of this
               Agreement and the International Underwriting Agreement do not and
               will not conflict with or result in a breach of any of the terms
               or provisions of, or constitute a default under, the charter or
               bylaws of such Significant Subsidiary or any indenture, mortgage
               or other agreement or instrument known to such counsel to which
               such Significant Subsidiary is a party or by which such
               Significant Subsidiary or any of its properties are bound, or any
               existing law, rule, regulation, judgment, order or decree of any
               government, governmental instrumentality or court, domestic or
               foreign, having jurisdiction over such Significant Subsidiary or
               any of its properties.

                              (iii)     All of the issued and outstanding shares
               of the capital stock of such Significant Subsidiary, other than
               director's qualifying shares, are owned of record by the Company,
               and, to the knowledge of such counsel, such shares are
               beneficially owned by the Company free and clear of all
               mortgages, pledges, liens, security interests, conditional sale
               agreements, charges, encumbrances and restrictions of every
               nature; and all of such shares are validly issued, fully paid and
               non-assessable.

     Such opinion shall be to such further effect with respect to other legal
     matters relating to this Agreement and the International Underwriting
     Agreement and the sale of the Shares hereunder and thereunder as counsel
     for the U.S. Underwriters may reasonably request.  In giving such opinion,
     such counsel may rely on certificates of public officials and officers of
     the applicable Significant Subsidiary as to matters of fact, in which case
     the opinion shall state that such counsel has no reason to believe that
     they and the U.S. Underwriters are not entitled to so rely on such
     certificates.

                         (f)  The Representatives shall have received from
          Latham & Watkins, counsel for the U.S. Underwriters, such opinion or
          opinions, dated such Delivery Date, with respect to the issuance and
          sale of the Stock, the Registration Statement, the Prospectus and
          other related matters as the


                                       16
<PAGE>

          Representatives may reasonably require, and the Company shall have
          furnished to such counsel such documents as they reasonably request
          for the purpose of enabling them to pass upon such matters.

                         (g)  At the time of execution of this Agreement, the
          Representatives shall have received from Coopers & Lybrand a letter,
          in form and substance satisfactory to the Representatives, addressed
          to the U.S. Underwriters and dated the date hereof stating, as of the
          date hereof (or, with respect to matters involving changes or
          developments since the respective dates as of which specified
          financial information is given in the Prospectus, as of a date not
          more than five days prior to the date hereof), the conclusions and
          findings of such firm with respect to the financial information and
          other matters ordinarily covered by accountants' "comfort letters" to
          underwriters in connection with registered public offerings.

                         (h)  With respect to the letter of Coopers & Lybrand
          referred to in the preceding paragraph and delivered to the
          Representatives concurrently with the execution of this Agreement (the
          "initial letter"), the Company shall have furnished to the
          Representatives a letter (the "bring-down letter") of such
          accountants, addressed to the U.S. Underwriters and dated such
          Delivery Date (i) confirming that they are independent public
          accountants within the meaning of the Securities Act and are in
          compliance with the applicable requirements relating to the
          qualification of accountants under Rule 2-01 of Regulation S-X of the
          Commission, (ii) stating, as of the date of the bring-down letter (or,
          with respect to matters involving changes or developments since the
          respective dates as of which specified financial information is given
          in the Prospectus, as of a date not more than five days prior to the
          date of the bring-down letter), the conclusions and findings of such
          firm with respect to the financial information and other matters
          covered by the initial letter and (iii) confirming in all material
          respects the conclusions and findings set forth in the initial letter.

                         (i)  The Company shall have furnished to the
          Representatives a certificate, dated such Delivery Date, executed by
          its Chairman of the Board, its President or a Vice President and its
          Chief Financial Officer stating that:

                              (i)  The representations, warranties and
               agreements of the Company in Section 1 are true and correct as of
               such Delivery Date; the Company has complied with all its
               agreements contained herein; and the conditions set forth in
               Sections 7(a) and 7(j) have been fulfilled; and

                              (ii) They have carefully examined the


                                       17
<PAGE>

               Registration Statement and the Prospectus and, in their opinion
               since the Effective Date no event has occurred which should have
               been set forth in a supplement or amendment to the Registration
               Statement or the Prospectus.

                         (j)  Neither the Company nor any of its subsidiaries
          shall have sustained since the date of the latest audited financial
          statements included or incorporated by reference in the Prospectus any
          loss or interference with its business from fire, explosion, flood or
          other calamity, whether or not covered by insurance, or from any labor
          dispute or court or governmental action, order or decree, otherwise
          than as set forth or contemplated in the Prospectus, and, other than
          in the ordinary course of business, that is material to the Company
          and its subsidiaries taken as a whole, since such date there shall not
          have been any change in the capital stock or long-term debt of the
          Company or any of its subsidiaries or any change, or any development
          involving a prospective change, in or affecting the general affairs,
          management, financial position, stockholders' equity or results of
          operations of the Company and its subsidiaries, otherwise than as set
          forth or contemplated in the Prospectus, the effect of which, in any
          such case described in clause (i) or (ii), is, in the judgment of the
          Representatives, so material and adverse as to make it impracticable
          or inadvisable to proceed with the public offering or the delivery of
          the Stock being delivered on such Delivery Date on the terms and in
          the manner contemplated in the Prospectus.

                         (k)  Subsequent to the execution and delivery of this
          Agreement there shall not have occurred any of the following: (i)
          trading in securities generally on the New York Stock Exchange or the
          American Stock Exchange or in the over-the-counter market, or trading
          in any securities of the Company on any exchange or in the over-the-
          counter market, shall have been wholly suspended or minimum prices
          shall have been established on any such exchange or such market by the
          Commission, by such exchange or by any other regulatory body or
          governmental authority having jurisdiction, (ii) a banking moratorium
          shall have been declared by Federal or state authorities, (iii) the
          United States shall have become engaged in hostilities, there shall
          have been an escalation in hostilities involving the United States or
          there shall have been a declaration of a national emergency or war by
          the United States or (iv) there shall have occurred such a substantial
          national or international calamity or other event or occurrence of a
          similar nature as to make it, in the judgment of a majority in
          interest of the several Underwriters, impracticable or inadvisable to
          proceed with the public offering or delivery of the Stock being
          delivered on such Delivery Date on the terms and in the manner
          contemplated in the Prospectus.


                                       18
<PAGE>

                         (l)  The New York and Pacific Stock Exchanges shall
          have approved the Stock for inclusion, subject only to official notice
          of issuance.

                         (m)  The closing under the International Underwriting
          Agreement shall have occurred concurrently with the closing hereunder
          on the First Delivery Date.

          All opinions, letters, evidence and certificates mentioned above or
elsewhere in this Agreement shall be deemed to be in compliance with the
provisions hereof only if they are in form and substance reasonably satisfactory
to counsel for the U.S. Underwriters.

          8.   INDEMNIFICATION AND CONTRIBUTION.

          (a)  The Company shall indemnify and hold harmless each U.S.
Underwriter and each person, if any, who controls any U.S. Underwriter within
the meaning of the Securities Act, from and against any loss, claim, damage or
liability, joint or several, or any action in respect thereof (including, but
not limited to, any loss, claim, damage, liability or action relating to
purchases and sales of Stock), to which that U.S. Underwriter or controlling
person may become subject, under the Securities Act or otherwise, insofar as
such loss, claim, damage, liability or action arises out of, or is based upon,
(i) any untrue statement or alleged untrue statement of a material fact
contained in any Preliminary Prospectus, the Registration Statement or the
Prospectus or in any amendment or supplement thereto or (ii) the omission or
alleged omission to state therein a material fact required to be stated therein
or necessary to make the statements therein not misleading, and shall reimburse
each U.S. Underwriter and each such controlling person promptly upon demand for
any legal or other expenses reasonably incurred by that U.S. Underwriter or
controlling person in connection with investigating or defending or preparing to
defend against any such loss, claim, damage, liability or action as such
expenses are incurred; PROVIDED, HOWEVER, that the Company shall not be liable
in any such case to the extent that any such loss, claim, damage, liability or
action arises out of, or is based upon, any untrue statement or alleged untrue
statement or omission or alleged omission made in any Preliminary Prospectus,
the Registration Statement or the Prospectus or in any such amendment or
supplement in reliance upon and in conformity with written information furnished
to the Company through the Representatives by or on behalf of any U.S.
Underwriter specifically for inclusion therein; and provided further that the
Company shall not be liable to any U.S. Underwriter under the indemnity
agreement in this subsection (a) with respect to any Preliminary Prospectus to
the extent that any such loss, claim, damage or liability of such U.S.
Underwriter results solely from an untrue statement of a material fact contained
in, or the omission of a material fact from, such Preliminary Prospectus which
untrue statement or omission was corrected in the U.S. Prospectus or the
International Prospectus or both, as the case may be, if the Company shall
sustain the burden of proving that such U.S. Underwriter sold Securities to the
person alleging such loss, claim, damage or liability without sending or giving,
at or prior to the written confirmation of such sale, a copy of the U.S.
Prospectus or the International Prospectus or both, as the case may be
(exclusive of the documents from which information is incorporated by reference)
(or of the Prospectus as then amended or supplemented), if the


                                       19
<PAGE>

Company had previously furnished copies thereof to such Underwriter.  The
foregoing indemnity agreement is in addition to any liability which the Company
may otherwise have to any U.S. Underwriter or to any controlling person of that
U.S. Underwriter.

          (b)  Each U.S. Underwriter, severally and not jointly, shall indemnify
and hold harmless the Company, each of its directors, each of its officers who
signed the Registration Statement and each person, if any, who controls the
Company within the meaning of the Securities Act, from and against any loss,
claim, damage or liability, joint or several, or any action in respect thereof,
to which the Company or any such director, officer or controlling person may
become subject, under the Securities Act or otherwise, insofar as such loss,
claim, damage, liability or action arises out of, or is based upon, (i) any
untrue statement or alleged untrue statement of a material fact contained in any
Preliminary Prospectus, the Registration Statement or the Prospectus or in any
amendment or supplement thereto or (ii) the omission or alleged omission to
state therein a material fact required to be stated therein or necessary to make
the statements therein not misleading, but in each case only to the extent that
the untrue statement or alleged untrue statement or omission or alleged omission
was made in reliance upon and in conformity with written information furnished
to the Company through the Representatives by or on behalf of that U.S.
Underwriter specifically for inclusion therein, and shall reimburse the Company
and any such director, officer or controlling person for any legal or other
expenses reasonably incurred by the Company or any such director, officer or
controlling person in connection with investigating or defending or preparing to
defend against any such loss, claim, damage, liability or action as such
expenses are incurred.  The foregoing indemnity agreement is in addition to any
liability which any U.S. Underwriter may otherwise have to the Company or any
such director, officer or controlling person.

          (c)  Promptly after receipt by an indemnified party under this Section
8 of notice of any claim or the commencement of any action, the indemnified
party shall, if a claim in respect thereof is to be made against the
indemnifying party under this Section 8, notify the indemnifying party in
writing of the claim or the commencement of that action; PROVIDED, HOWEVER, that
the failure to notify the indemnifying party shall not relieve it from any
liability which it may have under this Section 8 except to the extent it has
been materially prejudiced by such failure and, PROVIDED FURTHER, that the
failure to notify the indemnifying party shall not relieve it from any liability
which it may have to an indemnified party otherwise than under this Section 8.
If any such claim or action shall be brought against an indemnified party, and
it shall notify the indemnifying party thereof, the indemnifying party shall be
entitled to participate therein and, to the extent that it wishes, jointly with
any other similarly notified indemnifying party, to assume the defense thereof
with counsel reasonably satisfactory to the indemnified party.  After notice
from the indemnifying party to the indemnified party of its election to assume
the defense of such claim or action, the indemnifying party shall not be liable
to the indemnified party under this Section 8 for any legal or other expenses
subsequently incurred by the indemnified party in connection with the defense
thereof other than reasonable costs of investigation; PROVIDED, HOWEVER, that
the Representatives shall have the right to employ counsel to represent jointly
the Representatives and those other U.S. Underwriters and their respective
controlling persons who may be subject to liability arising out of any claim in
respect of which


                                       20
<PAGE>

indemnity may be sought by the U.S. Underwriters against the Company under this
Section 8 if, in the reasonable judgment of counsel to the Representatives, it
is advisable for the Representatives and those U.S. Underwriters and controlling
persons to be jointly represented by separate counsel, and in that event the
fees and expenses of such separate counsel shall be paid by the Company.  An
indemnifying party will not, without the prior written consent of the
indemnified parties (which consent shall not be unreasonably withheld), settle
or compromise or consent to the entry of any judgment with respect to any
pending or threatened claim, action, suit or proceeding in respect of which
indemnification or contribution may be sought hereunder (whether or not the
indemnified parties are actual or potential parties to such claim or action)
unless such settlement, compromise or consent includes an unconditional release
of each indemnified party from all liability arising out of such claim, action,
suit or proceeding.  An indemnified party will not, without the prior written
consent of the indemnifying party (which consent shall not be unreasonably
withheld), settle or compromise any such action, but if settled with the consent
of the indemnifying party or if there be a final judgment for the plaintiff in
any such action, the indemnifying party agrees to indemnify and hold harmless
any indemnified party from and against any loss or liability by reason of such
settlement or judgment.

          (d)  If the indemnification provided for in this Section 8 shall for
any reason be unavailable to or insufficient to hold harmless an indemnified
party under Section 8(a) or 8(b) in respect of any loss, claim, damage or
liability, or any action in respect thereof, referred to therein, then each
indemnifying party shall, in lieu of indemnifying such indemnified party,
contribute to the amount paid or payable by such indemnified party as a result
of such loss, claim, damage or liability, or action in respect thereof, (i) in
such proportion as shall be appropriate to reflect the relative benefits
received by the Company on the one hand and the U.S. Underwriters on the other
from the offering of the Stock or (ii) if the allocation provided by clause (i)
above is not permitted by applicable law, in such proportion as is appropriate
to reflect not only the relative benefits referred to in clause (i) above but
also the relative fault of the Company on the one hand and the U.S. Underwriters
on the other with respect to the statements or omissions which resulted in such
loss, claim, damage or liability, or action in respect thereof, as well as any
other relevant equitable considerations.  The relative benefits received by the
Company on the one hand and the U.S. Underwriters on the other with respect to
such offering shall be deemed to be in the same proportion as the total net
proceeds from the offering of the Stock purchased under this Agreement (before
deducting expenses) received by the Company on the one hand, and the total
underwriting discounts and commissions received by the U.S. Underwriters with
respect to the shares of the Stock purchased under this Agreement, on the other
hand, bear to the total gross proceeds from the offering of the shares of the
Stock under this Agreement, in each case as set forth in the table on the cover
page of the Prospectus.  The relative fault shall be determined by reference to
whether the untrue or alleged untrue statement of a material fact or omission or
alleged omission to state a material fact relates to information supplied by the
Company or the U.S. Underwriters, the intent of the parties and their relative
knowledge, access to information and opportunity to correct or prevent such
statement or omission.  The U.S. Underwriters agree that it would not be just
and equitable if contributions pursuant to this Section  were to be determined
by pro rata allocation (even if the U.S. Underwriters were treated as one entity
for such purpose) or by any other method of


                                       21
<PAGE>

allocation which does not take into account the equitable considerations
referred to herein.  The amount paid or payable by an indemnified party as a
result of the loss, claim, damage or liability, or action in respect thereof,
referred to above in this Section 8(d) shall be deemed to include, for purposes
of this Section 8(d), any legal or other expenses reasonably incurred by such
indemnified party in connection with investigating or defending any such action
or claim.  Notwithstanding the provisions of this Section 8(d), no U.S.
Underwriter shall be required to contribute any amount in excess of the amount
by which the total price at which the Stock underwritten by it and distributed
to the public was offered to the public exceeds the amount of any damages which
such U.S. Underwriter has otherwise paid or become liable to pay by reason of
any untrue or alleged untrue statement or omission or alleged omission.  No
person guilty of fraudulent misrepresentation (within the meaning of Section
11(f) of the Securities Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation.  The U.S. Underwriters'
obligations to contribute as provided in this Section 8(d) are several in
proportion to their respective underwriting obligations and not joint.

          (e)  The U.S. Underwriters severally confirm that the statements with
respect to the public offering of the Stock set forth on the cover page of, and
under the caption "Underwriting" in, the Prospectus are correct and constitute
the only information furnished in writing to the Company by or on behalf of the
U.S. Underwriters specifically for inclusion in the Registration Statement and
the Prospectus.

          9.   DEFAULTING UNDERWRITERS.

          If, on either Delivery Date, any U.S. Underwriter defaults in the
performance of its obligations under this Agreement, the remaining non-
defaulting U.S. Underwriters shall be obligated to purchase the Stock which the
defaulting U.S. Underwriter agreed but failed to purchase on such Delivery Date
in the respective proportions which the number of shares of the Firm Stock set
forth opposite the name of each remaining non-defaulting U.S. Underwriter in
Schedule 1 hereto bears to the total number of shares of the Firm Stock set
forth opposite the names of all the remaining non-defaulting U.S. Underwriters
in Schedule 1 hereto; PROVIDED, HOWEVER, that the remaining non-defaulting U.S.
Underwriters shall not be obligated to purchase any of the Stock on such
Delivery Date if the total number of shares of the Stock which the defaulting
U.S. Underwriter or U.S. Underwriters agreed but failed to purchase on such date
exceeds 9.09% of the total number of shares of the Stock to be purchased on such
Delivery Date, and any remaining non-defaulting U.S. Underwriter shall not be
obligated to purchase more than 110% of the number of shares of the Stock which
it agreed to purchase on such Delivery Date pursuant to the terms of Section 2.
If the foregoing maximums are exceeded, the remaining non-defaulting U.S.
Underwriters, or those other underwriters satisfactory to the Representatives
who so agree, shall have the right, but shall not be obligated, to purchase, in
such proportion as may be agreed upon among them, all the Stock to be purchased
on such Delivery Date.  If the remaining U.S. Underwriters or other underwriters
satisfactory to the Representatives do not elect to purchase the shares which
the defaulting U.S. Underwriter or U.S. Underwriters agreed but failed to
purchase on such Delivery Date, this Agreement (or, with respect to the Second
Delivery Date, the obligation of the U.S. Underwriters to purchase,


                                       22
<PAGE>

and of the Company to sell, the Option Stock) shall terminate without liability
on the part of any non-defaulting Underwriter or the Company, except that the
Company will continue to be liable for the payment of expenses to the extent set
forth in Sections 6 and 11.  As used in this Agreement, the term "U.S.
Underwriter" includes, for all purposes of this Agreement unless the context
requires otherwise, any party not listed in Schedule 1 hereto who, pursuant to
this Section 9, purchases Firm Stock which a defaulting U.S. Underwriter agreed
but failed to purchase.

          Nothing contained herein shall relieve a defaulting U.S. Underwriter
of any liability it may have to the Company for damages caused by its default.
If other underwriters are obligated or agree to purchase the Stock of a
defaulting or withdrawing U.S. Underwriter, either the Representatives or the
Company may postpone the Delivery Date for up to seven full business days in
order to effect any changes that in the opinion of counsel for the Company or
counsel for the U.S. Underwriters may be necessary in the Registration
Statement, the Prospectus or in any other document or arrangement.

          10.  TERMINATION.  The obligations of the U.S. Underwriters hereunder
may be terminated by the Representatives by notice given to and received by the
Company prior to delivery of and payment for the Firm Stock if, prior to that
time, any of the events described in Section 7(j), shall have occurred or if the
U.S. Underwriters shall decline to purchase the Stock for any reason permitted
under this Agreement.

          11.  REIMBURSEMENT OF UNDERWRITERS' EXPENSES.  If the sale of the U.S.
Shares provided for herein is not consummated by reason of any failure, refusal
or inability on the part of the Company to perform any agreement on its part to
be performed, or because any other condition of the U.S. Underwriters'
obligations hereunder required to be fulfilled by the Company is not fulfilled,
the Company will reimburse the U.S. Underwriters for all reasonable out-of-
pocket expenses (including fees and disbursements of counsel) incurred by the
Underwriters in connection with this Agreement and the proposed purchase of the
Stock, and upon demand the Company shall pay the full amount thereof to the
Representatives.

          12.  NOTICES, ETC.  All statements, requests, notices and agreements
hereunder shall be in writing, and:

                         (a) if to the U.S. Underwriters, shall be delivered or
          sent by mail, telex or facsimile transmission to Lehman Brothers Inc.,
          Three World Financial Center, New York, New York 10285, Attention:
          Syndicate Department (Fax: 212-528-8822), with a copy, in the case of
          any notice pursuant to Section 11(d), to the Director of Litigation,
          Office of the General Counsel, Lehman Brothers Inc., 2 World Trade
          Center, 15th Floor, New York, NY 10048;

                         (b) if to the Company shall be delivered or sent by
          mail, telex or facsimile transmission to the address of the Company
          set forth in the Registration Statement, Attention: Lesley Kleveter
          (Fax: 310-607-8844);


                                       23
<PAGE>

PROVIDED, HOWEVER, that any notice to an U.S. Underwriter pursuant to Section
8(c) shall be delivered or sent by mail, telex or facsimile transmission to such
U.S. Underwriter at its address set forth in its acceptance telex to the
Representatives, which address will be supplied to any other party hereto by the
Representatives upon request.  Any such statements, requests, notices or
agreements shall take effect at the time of receipt thereof.  The Company shall
be entitled to act and rely upon any request, consent, notice or agreement given
or made on behalf of the U.S.  Underwriters by Lehman Brothers Inc. on behalf of
the Representatives.

          13.  PERSONS ENTITLED TO BENEFIT OF AGREEMENT.  This Agreement shall
inure to the benefit of and be binding upon the U.S. Underwriters, the Company,
and their respective successors.  This Agreement and the terms and provisions
hereof are for the sole benefit of only those persons, except that (A) the
representations, warranties, indemnities and agreements of the Company contained
in this Agreement shall also be deemed to be for the benefit of the person or
persons, if any, who control any U.S. Underwriter within the meaning of
Section 15 of the Securities Act and for the benefit of each International
Manager (and controlling persons thereof) who offers or sells any shares of
Common Stock in accordance with the terms of the Agreement between U.S.
Underwriters and International Managers and (B) the indemnity agreement of the
U.S. Underwriters contained in Section 8(b) of this Agreement shall be deemed to
be for the benefit of directors of the Company, officers of the Company who have
signed the Registration Statement and any person controlling the Company within
the meaning of Section 15 of the Securities Act.  Nothing in this Agreement is
intended or shall be construed to give any person, other than the persons
referred to in this Section 13, any legal or equitable right, remedy or claim
under or in respect of this Agreement or any provision contained herein.

          14.  SURVIVAL.  The respective indemnities, representations,
warranties and agreements of the Company and the U.S. Underwriters contained in
this Agreement or made by or on behalf on them, respectively, pursuant to this
Agreement, shall survive the delivery of and payment for the Stock and shall
remain in full force and effect, regardless of any investigation made by or on
behalf of any of them or any person controlling any of them.

          15.  DEFINITION OF THE TERM "BUSINESS DAY".  For purposes of this
Agreement, "business day" means any day on which the New York Stock Exchange,
Inc. is open for trading.

          16.  GOVERNING LAW.  THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE LAWS OF NEW YORK.

          17.  COUNTERPARTS.  This Agreement may be executed in one or more
counterparts and, if executed in more than one counterpart, the executed
counterparts shall each be deemed to be an original but all such counterparts
shall together constitute one and the same instrument.

          18.  HEADINGS.  The headings herein are inserted for convenience of
reference only and are not intended to be part of, or to affect the meaning or
interpretation of, this Agreement.


                                       24
<PAGE>

          If the foregoing correctly sets forth the agreement between the
Company and the U.S. Underwriters, please indicate your acceptance in the space
provided for that purpose below.

                              Very truly yours,

                              INTERNATIONAL RECTIFIER CORPORATION

                              By
                                 ----------------------------------------
                                 Eric Lidow
                                 President and Chief Executive Officer

LEHMAN BROTHERS INC.
KIDDER, PEABODY & CO. INCORPORATED
MONTGOMERY SECURITIES
PAINEWEBBER INCORPORATED
SMITH BARNEY INC.

For themselves and as Representatives
of the several Underwriters named
in Schedule 1 hereto

     By LEHMAN BROTHERS INC.

     By
        -------------------------------------
          H. Brooks Dexter


                                       25
<PAGE>

                                   SCHEDULE 1


                                                       Number of
     Underwriters                                        Shares
     ------------                                      ---------

     Lehman Brothers Inc.. . . . . . . . . . . .
     Kidder Peabody & Co. Incorporated . . . . .
     Montgomery Securities . . . . . . . . . . .
     PaineWebber Incorporated. . . . . . . . . .
     Smith Barney Inc. . . . . . . . . . . . . .


                                                        ---------
          Total. . . . . . . . . . . . . . . . .        3,600,000
                                                        ---------
                                                        ---------


                                        1


<PAGE>

                                                                    EXHIBIT 1(b)


                                1,035,000 SHARES

                       INTERNATIONAL RECTIFIER CORPORATION

                                  COMMON STOCK
                                ($1.00 PAR VALUE)

                      INTERNATIONAL UNDERWRITING AGREEMENT

                                                               November __, 1994

LEHMAN BROTHERS INTERNATIONAL (EUROPE)
KIDDER, PEABODY INTERNATIONAL PLC
MONTGOMERY SECURITIES
PAINEWEBBER INTERNATIONAL (U.K.) LTD.
SMITH BARNEY INC.
As Representatives of the several
  Underwriters named in Schedule 1,
c/o Lehman Brothers Inc.
Three World Financial Center
New York, New York 10285

Dear Sirs:

          International Rectifier Corporation, a Delaware corporation (the
"Company"), proposes to sell 900,000 shares (the "International Stock") of the
Company's Common Stock, par value $1.00 per share (the "Common Stock") through
arrangements with certain underwriters outside the United States named in
Schedule 1 hereto (the "International Managers"), for whom Lehman Brothers
International (Europe), Kidder, Peabody International PLC, Montgomery
Securities, PaineWebber International (U.K.) Ltd. and Smith Barney Inc. are
acting as lead managers.  In addition, the Company proposes to grant to the
International Managers an option to purchase up to an additional 135,000 shares
of the Common Stock on the terms and for the purposes set forth in Section 2
(the "Option Stock").  The International Stock and the Option Stock, if
purchased, are hereinafter collectively called the "Stock."

          It is understood by all parties that the Company is concurrently
entering into an agreement dated the date hereof (the "U.S. Underwriting
Agreement") providing for the sale by

<PAGE>

the Company of 3,600,000 shares of Common Stock (the "Firm Stock") through the
U.S. Underwriters named in Schedule 2 hereof (the "U.S. Underwriters").  In
addition, the Company proposes to grant to the U.S. Underwriters an option to
purchase up to an additional 540,000 shares of the Common Stock on the terms and
for the purposes set forth in Section 2.

          The U.S. Underwriters and the International Managers simultaneously
are entering into an agreement between the U.S. and international underwriting
syndicates (the "Agreement Between U.S. Underwriters and International
Managers") which provides for, among other things, the transfer of shares of
Common Stock between the two syndicates.  Two forms of prospectus are to be used
in connection with the offering and sale of shares of Common Stock contemplated
by the foregoing, one relating to the Firm Stock and the other relating to the
U.S. Stock.  The latter form of prospectus will be identical to the former
except for certain substitute pages as included in the registration statement
and amendments thereto referred to below.  Except as used in Sections 2, 3, 4,
9, and 10 herein, and except as the context may otherwise require, references
herein to the Stock shall include all the shares of which may be sold pursuant
to either this Agreement or the U.S. Underwriting Agreement, and references
herein to any prospectus whether in preliminary or final form, and whether as
amended or supplemented, shall include both the U.S. and the international
versions thereof.

          1.   REPRESENTATIONS, WARRANTIES AND AGREEMENTS OF THE COMPANY.  The
Company represents, warrants and agrees that:

               (a)  A registration statement on Form S-3 with respect to the
     Stock has (i) been prepared by the Company in conformity with the
     requirements of the United States Securities Act of 1933 (the "Securities
     Act") and the rules and regulations (the "Rule and Regulations") of the
     United States Securities and Exchange Commission (the "Commission")
     thereunder, (ii) been filed with the Commission under the Securities Act
     and (iii) become effective under the Securities Act.  Copies of such
     registration statement and all amendments thereto have been delivered by
     the Company to you as the representatives (the "Representatives") of the
     International Managers.  As used in this Agreement, "Effective Time" means
     the date and the time as of which such registration statement, or the most
     recent post-effective amendment thereto, if any, was declared effective by
     the Commission; "Effective Date" means the date of the Effective Time;
     "Preliminary Prospectus" means each prospectus included in such
     registration statement, or amendments thereof, before it became effective
     under the Securities Act and any prospectus filed with the Commission by
     the Company with the consent of the Representatives pursuant to Rule 424(a)
     of the Rules and Regulations; "Registration Statement" means such
     registration statement, as amended at the Effective Time, including any
     documents incorporated by reference therein at such time and all
     information contained in the final prospectus filed with the Commission
     pursuant to Rule 424(b) of the Rules and Regulations in accordance with
     Section 5(a) hereof and deemed to be a part of the registration statement
     as of the Effective Time pursuant to paragraph (b) of Rule 430A of the
     Rules and Regulations; and "Prospectus" means such final prospectus, as
     first filed with the Commission pursuant to paragraph (1) or (4) of Rule
     424(b) of the Rules and Regulations.  Reference made herein to any
     Preliminary Prospectus or to the Prospectus shall be deemed to refer to and
     include any documents


                                        2
<PAGE>

     incorporated by reference therein pursuant to Item 12 of Form S-3 under the
     Securities Act, as of the date of such Preliminary Prospectus or the
     Prospectus, as the case may be, and any reference to any amendment or
     supplement to any Preliminary Prospectus or the Prospectus shall be deemed
     to refer to and include any document filed under the United States
     Securities Exchange Act of 1934 (the "Exchange Act") after the date of such
     Preliminary Prospectus or the Prospectus, as the case may be, and
     incorporated by reference in such Preliminary Prospectus or the Prospectus,
     as the case may be; and any reference to any amendment to the Registration
     Statement shall be deemed to include any annual report of the Company filed
     with the Commission pursuant to Section 13(a) or 15(d) of the Exchange Act
     after the Effective Time that is incorporated by reference in the
     Registration Statement.  The Commission has not issued any order preventing
     or suspending the use of any Preliminary Prospectus.

               (b)  The Registration Statement conforms, and the Prospectus and
     any further amendments or supplements to the Registration Statement or the
     Prospectus will, when they become effective or are filed with the
     Commission, as the case may be, conform in all material respects to the
     requirements of the Securities Act and the Rules and Regulations and will
     not, as of the applicable effective date (as to the Registration Statement
     and any amendment thereto) and as of the applicable filing date (as to the
     Prospectus and any amendment or supplement thereto) contain an untrue
     statement of a material fact or omit to state a material fact required to
     be stated therein or necessary to make the statements therein not
     misleading; PROVIDED that no representation or warranty is made as to
     information contained in or omitted from the Registration Statement or the
     Prospectus in reliance upon and in conformity with written information
     furnished to the Company through the Representatives by or on behalf of any
     International Manager specifically for inclusion therein.

               (c)  The documents incorporated by reference in the Prospectus,
     when they became effective or were filed with the Commission, as the case
     may be, conformed in all material respects to the requirements of the
     Exchange Act and the rules and regulations of the Commission thereunder,
     and none of such documents contained an untrue statement of a material fact
     or omitted to state a material fact required to be stated therein or
     necessary to make the statements therein not misleading.

               (d)  The Company and each of its Significant Subsidiaries (as
     defined in Section 1(s)) have been duly incorporated and are validly
     existing as corporations in good standing under the laws of their
     respective jurisdictions of incorporation, are duly qualified to do
     business and are in good standing as foreign corporations in each
     jurisdiction in which their respective ownership or lease of property or
     the conduct of their respective businesses requires such qualification
     (except where the failure to be so qualified, considering all such cases in
     the aggregate, does not involve a material risk to the business,
     properties, financial position or results of operations of the Company and
     its subsidiaries taken as a whole) and have all corporate power and
     authority necessary to own or hold their respective properties and to
     conduct the businesses in which they are engaged and none of the
     subsidiaries of the Company is a "significant subsidiary,"


                                        3
<PAGE>

     as such term is defined in Rule 405 of the Rules and Regulations, except as
     set forth in Section 1(s) below.

               (e)  The Company has an authorized capitalization as set forth in
     the Prospectus, and all of the issued shares of capital stock of the
     Company have been duly and validly authorized and issued, are fully paid
     and non-assessable and conform to the description thereof contained in the
     Prospectus; and all of the issued shares of capital stock of each
     subsidiary of the Company have been duly and validly authorized and issued
     and are fully paid and non-assessable and (except for directors' qualifying
     shares) are owned directly or indirectly by the Company, free and clear of
     all liens, encumbrances, equities or claims.

               (f)  The unissued shares of the Stock to be issued and sold by
     the Company to the International Managers hereunder and to the U.S.
     Underwriters under the U.S. Underwriting Agreement have been duly and
     validly authorized and, when issued and delivered against payment therefor
     as provided herein and in the U.S. Underwriting Agreement, will be duly and
     validly issued, fully paid and non-assessable; and the Stock will conform
     to the description thereof contained in the Prospectus.

               (g)  This Agreement has been duly authorized, executed and
     delivered by the Company.

               (h)  The Company and each of its subsidiaries have complied in
     all respects with all laws, regulations and orders applicable to them or
     their respective businesses, the violation of which would have a material
     adverse effect upon the business, properties, financial condition or
     earnings of the Company and its subsidiaries taken as a whole, and neither
     the Company nor any of its subsidiaries is in default under any indenture,
     mortgage, deed of trust, voting trust agreement, loan agreement, bond,
     debenture, note agreement or other evidence of indebtedness, lease,
     contract or other agreement or instrument to which any of them is a party
     or by which any of them or any of their respective properties are bound,
     which default would individually or in the aggregate have a material
     adverse effect on the Company and its subsidiaries taken as a whole, and no
     other party under any such agreement or instrument to which the Company or
     any of its subsidiaries is a party is, to the knowledge of the Company, in
     default in any material respect thereunder, and neither the Company nor any
     of its subsidiaries is in violation of its respective charter or bylaws, as
     the case may be.

               (i)  The execution, delivery and performance of this Agreement
     and the U.S. Underwriting Agreement by the Company and the consummation of
     the transactions contemplated hereby will not conflict with or result in a
     breach or violation of any of the terms or provisions of, or constitute a
     default under, any indenture, mortgage, deed of trust, loan agreement or
     other agreement or instrument to which the Company or any of its
     subsidiaries is a party or by which the Company or any of its subsidiaries
     is bound or to which any of the property or assets of the Company or any of
     its subsidiaries is subject, nor will such actions result in any violation
     of the provisions of the charter or by-laws of the Company or any of its
     subsidiaries or any statute or any order, rule or


                                        4
<PAGE>

     regulation of any court or governmental agency or body having jurisdiction
     over the Company or any of its subsidiaries or any of their properties or
     assets; and except for the registration of the Stock under the Securities
     Act and such consents, approvals, authorizations, registrations or
     qualifications as may be required under the Exchange Act and applicable
     state or foreign securities laws in connection with the purchase and
     distribution of the Stock by the International Managers and the U.S.
     Underwriters no consent, approval, authorization or order of, or filing or
     registration with, any such court or governmental agency or body is
     required for the execution, delivery and performance of this Agreement, or
     the U.S. Underwriting Agreement by the Company and the consummation of the
     transactions contemplated hereby.

               (j)  There are no contracts, agreements or understandings between
     the Company and any person granting such person the right to require the
     Company to file a registration statement under the Securities Act with
     respect to any securities of the Company owned or to be owned by such
     person or to require the Company to include such securities in the
     securities registered pursuant to the Registration Statement.

               (k)  Except as described in the Prospectus, the Company has not
     sold or issued any shares of Common Stock during the six-month period
     preceding the date of the Prospectus, including any sales pursuant to Rule
     144A under, or Regulations D or S of, the Securities Act other than shares
     issued pursuant to employee benefit plans, qualified stock options plans or
     other employee compensation plans or pursuant to outstanding options,
     rights or warrants.

               (l)  Neither the Company nor any of its subsidiaries has
     sustained, since the date of the latest audited financial statements
     included or incorporated by reference in the Prospectus, any material loss
     or interference with its business from fire, explosion, flood or other
     calamity, whether or not covered by insurance, or from any labor dispute or
     court or governmental action, order or decree, otherwise than as set forth
     or contemplated in the Prospectus; and, since such date, there has not been
     any change in the capital stock or long-term debt of the Company or any of
     its subsidiaries, other than in the ordinary course of business that is
     material to the Company and its Subsidiaries taken as a whole, or any
     material adverse change, or any development involving a prospective
     material adverse change, in or affecting the general affairs, management,
     financial position, stockholders' equity or results of operations of the
     Company and its subsidiaries, otherwise than as set forth or contemplated
     in the Prospectus.

               (m)  The financial statements including the related notes and
     supporting schedules filed as part of the Registration Statement or
     included or incorporated by reference in the Prospectus present fairly the
     financial condition and results of operations of the entities purported to
     be shown thereby, at the dates and for the periods indicated, and have been
     prepared in conformity with generally accepted accounting principles
     applied on a consistent basis throughout the periods involved.

               (n)  The Company and each of its subsidiaries have good and
     marketable title in fee simple to all real property and good and marketable
     title to all


                                        5
<PAGE>

     personal property owned by them, in each case free and clear of all liens,
     encumbrances and defects except such as are described in the Prospectus or
     such as do not materially affect the value of such property and do not
     materially interfere with the use made and proposed to be made of such
     property by the Company and its subsidiaries; and all real property and
     buildings held under lease by the Company and its subsidiaries are held by
     them under valid, subsisting and enforceable leases, with such exceptions
     as are not material and do not interfere with the use made and proposed to
     be made of such property and buildings by the Company and its subsidiaries.

               (o)  Except to the extent that legal proceedings between the
     Company and SGS-Thomson Microelectronics, Inc., as disclosed in the
     Prospectus, are resolved on a materially adverse basis to the Company, each
     of the Company and its subsidiaries have sufficient trademarks, trade
     names, registered service marks, patent rights, licenses, permits,
     copyright protection and similar governmental authorizations currently
     required for the conduct of the Company's business, and the Company and
     each of its subsidiaries, as the case may be, is in all material respects
     complying therewith; other than as disclosed in the Prospectus, the
     expiration of any such trademarks, trade names, registered service marks,
     patent rights, licenses, permits, copyrights and similar governmental
     authorization would not materially adversely affect the condition
     (financial or otherwise), business, results of operations or prospects of
     the Company and its subsidiaries taken as a whole; and, except as disclosed
     in the Prospectus, or in writing by the Company to the Representatives of
     the several U.S. Underwriters, neither the Company nor any subsidiary has
     received any notice of violation or infringement of or conflict with
     asserted rights of others with respect to any trademarks, trade names,
     registered service marks, patent rights, licenses or copyrights.

               (p)  Except as described in the Prospectus, there are no legal or
     governmental proceedings pending to which the Company or any of its
     subsidiaries is a party or of which any property or assets of the Company
     or any of its subsidiaries is the subject which, if determined adversely to
     the Company or any of its subsidiaries, might have a material adverse
     effect on the consolidated financial position, stockholders' equity,
     results of operations, business or prospects of the Company and its
     subsidiaries; and to the best of the Company's knowledge, no such
     proceedings are threatened or contemplated by governmental authorities or
     threatened by others.

               (q)  There are no contracts or other documents which are required
     to be described in the Prospectus or filed as exhibits to the Registration
     Statement by the Securities Act or by the Rules and Regulations which have
     not been described in the Prospectus or filed as exhibits to the
     Registration Statement or incorporated therein by reference as permitted by
     the Rules and Regulations.

               (r)  Neither the Company nor any subsidiary is an "investment
     company" within the meaning of such term under the United States Investment
     Company Act of 1940 and the rules and regulations of the Commission
     thereunder.


                                        6
<PAGE>

               (s)  The only significant subsidiaries of the Company, as such
     term is defined in Rule 405 of the Rules and Regulations, are International
     Rectifier Company (Great Britain) Limited and International Rectifier
     Corporation Italiana S.p.A. (the "Significant Foreign Subsidiaries").

          2.   PURCHASE OF THE STOCK BY THE INTERNATIONAL MANAGERS.  On the
basis of the representations and warranties contained in, and subject to the
terms and conditions of, this Agreement, the Company agrees to sell the
International Stock to the several International Managers and each of the
International Managers, severally and not jointly, agrees to purchase the number
of shares of the International Stock set forth opposite that International
Manager's name in Schedule 1 hereto.  The respective purchase obligations of the
International Managers with respect to the International Stock shall be rounded
among the International Managers to avoid fractional shares, as the
Representatives may determine.

          In addition, the Company grants to the International Managers an
option to purchase up to 135,000 shares of Option Stock.  Such option is granted
solely for the purpose of covering over-allotments in the sale of International
Stock and is exercisable as provided in Section 4 hereof.  Shares of Option
Stock shall be purchased severally for the account of the International Managers
in proportion to the number of shares of International Stock set forth opposite
the name of such International Managers in Schedule 1 hereto.  The respective
purchase obligations of each International Manager with respect to the Option
Stock shall be adjusted by the Representatives so that no International Manager
shall be obligated to purchase Option Stock other than in 100 share amounts.
The price of both the International Stock and any Option Stock shall be $_____
per share.

          The Company shall not be obligated to deliver any of the Stock to be
delivered on the First Delivery Date or the Second Delivery Date (as hereinafter
defined), as the case may be, except upon payment for all the Stock to be
purchased on such Delivery Date as provided herein and in the U.S. Underwriting
Agreement.

          3.   OFFERING OF STOCK BY THE INTERNATIONAL MANAGERS.  Upon
authorization by the Representatives of the release of the Firm Stock, the
several International Managers propose to offer the International Stock for sale
upon the terms and conditions set forth in the Prospectus.

          Each International Manager agrees that, except to the extent permitted
by the Agreement Between U.S. Underwriters and International Managers, it will
not offer or sell any of the Stock in the United States or Canada.

          4.   DELIVERY OF AND PAYMENT FOR THE STOCK.  Delivery of the
International Stock shall be made at the office of Lehman Brothers Inc., New
York, New York and payment for the International Stock shall be made at the
office of [Latham & Watkins], Los Angeles, California at 10:00 A.M., New York
City time, on the fifth full business day following the date of this Agreement
or at such other date or place as shall be determined by agreement between the
Representatives and the Company.  This date and time are sometimes referred to
as the "First Delivery Date."  On the First Delivery Date, the Company shall
deliver or cause to be delivered certificates representing the International
Stock to the Representatives for the account of each


                                        7
<PAGE>

International Manager against payment to or upon the order of the Company of the
purchase price by certified or official bank check or checks payable in Clearing
House (next-day) funds.  Time shall be of the essence, and delivery at the time
and place specified pursuant to this Agreement is a further condition of the
obligation of each International Manager hereunder.  Upon delivery, the
International Stock shall be registered in such names and in such denominations
as the Representatives shall request in writing not less than two full business
days prior to the First Delivery Date.  For the purpose of expediting the
checking and packaging of the certificates for the International Stock, the
Company shall make the certificates representing the International Stock
available for inspection by the Representatives in New York, New York, not later
than 2:00 P.M., New York City time, on the business day prior to the First
Delivery Date.

          At any time on or before the thirtieth day after the date of this
Agreement the option granted in Section 2 may be exercised by written notice
being given to the Company by the Representatives.  Such notice shall set forth
the aggregate number of shares of Option Stock as to which the option is being
exercised, the names in which the shares of Option Stock are to be registered,
the denominations in which the shares of Option Stock are to be issued and the
date and time, as determined by the Representatives, when the shares of Option
Stock are to be delivered; PROVIDED, HOWEVER, that this date and time shall not
be earlier than the First Delivery Date nor earlier than the second business day
after the date on which the option shall have been exercised nor later than the
fifth business day after the date on which the option shall have been exercised.
The date and time the shares of Option Stock are delivered are sometimes
referred to as the "Second Delivery Date" and the First Delivery Date and the
Second Delivery Date are sometimes each referred to as a "Delivery Date."

          Delivery of and payment for the Option Stock shall be made at the
place specified in the first sentence of the first paragraph of this Section 4
(or at such other place as shall be determined by agreement between the
Representatives and the Company) at 10:00 A.M., New York City time, on the
Second Delivery Date.  On the Second Delivery Date, the Company shall deliver or
cause to be delivered the certificates representing the Option Stock to the
Representatives for the account of each International Manager against payment to
or upon the order of the Company of the purchase price by certified or official
bank check or checks payable in New York Clearing House (next-day) funds.  Time
shall be of the essence, and delivery at the time and place specified pursuant
to this Agreement is a further condition of the obligation of each International
Manager hereunder.  Upon delivery, the Option Stock shall be registered in such
names and in such denominations as the Representatives shall request in the
aforesaid written notice.  For the purpose of expediting the checking and
packaging of the certificates for the Option Stock, the Company shall make the
certificates representing the Option Stock available for inspection by the
Representatives in New York, New York, not later than 2:00 P.M., New York City
time, on the business day prior to the Second Delivery Date.

          5.   FURTHER AGREEMENTS OF THE COMPANY.  The Company agrees:

               (a)  To prepare the Prospectus in a form approved by the
     Representatives and to file such Prospectus pursuant to Rule 424(b) under
     the Securities Act not later than the Commission's close of business on the
     second business day


                                        8
<PAGE>

     following the execution and delivery of this Agreement or, if applicable,
     such earlier time as may be required by Rule 430A(a)(3) under the
     Securities Act; to make no further amendment or any supplement to the
     Registration Statement or to the Prospectus prior to the last Delivery Date
     except as permitted herein; to advise the Representatives, promptly after
     it receives notice thereof, of the time when any amendment to the
     Registration Statement has been filed or becomes effective or any
     supplement to the Prospectus or any amended Prospectus has been filed and
     to furnish the Representatives with copies thereof; to file promptly all
     reports and any definitive proxy or information statements required to be
     filed by the Company with the Commission pursuant to Section 13(a), 13(c),
     14 or 15(d) of the Exchange Act subsequent to the date of the Prospectus
     and for so long as the delivery of a prospectus is required in connection
     with the offering or sale of the Stock; to advise the Representatives,
     promptly after it receives notice thereof, of the issuance by the
     Commission of any stop order or of any order preventing or suspending the
     use of any Preliminary Prospectus or the Prospectus, of the suspension of
     the qualification of the Stock for offering or sale in any jurisdiction, of
     the initiation or threatening of any proceeding for any such purpose, or of
     any request by the Commission for the amending or supplementing of the
     Registration Statement or the Prospectus or for additional information;
     and, in the event of the issuance of any stop order or of any order
     preventing or suspending the use of any Preliminary Prospectus or the
     Prospectus or suspending any such qualification, to use promptly its best
     efforts to obtain its withdrawal;

               (b)  To furnish promptly to each of the Representatives and to
     counsel for the International Managers a signed copy of the Registration
     Statement as originally filed with the Commission, and each amendment
     thereto filed with the Commission, including all consents and exhibits
     filed therewith;

               (c)  To deliver promptly to the Representatives such number of
     the following documents as the Representatives shall reasonably request:
     (i) conformed copies of the Registration Statement as originally filed with
     the Commission and each amendment thereto (in each case excluding exhibits
     other than this Agreement and the computation of per share earnings), (ii)
     each Preliminary Prospectus, the Prospectus and any amended or supplemented
     Prospectus and (iii) any document incorporated by reference in the
     Prospectus (excluding exhibits thereto; and, if the delivery of a
     prospectus is required at any time after the Effective Time in connection
     with the offering or sale of the Stock or any other securities relating
     thereto and if at such time any events shall have occurred as a result of
     which the Prospectus as then amended or supplemented would include an
     untrue statement of a material fact or omit to state any material fact
     necessary in order to make the statements therein, in the light of the
     circumstances under which they were made when such Prospectus is delivered,
     not misleading, or, if for any other reason it shall be necessary to amend
     or supplement the Prospectus or to file under the Exchange Act any document
     incorporated by reference in the Prospectus in order to comply with the
     Securities Act or the Exchange Act, to notify the Representatives and, upon
     their request, to file such document and to prepare and furnish without
     charge to each International Manager and to any dealer in securities as
     many copies as the Representatives may from time to time reasonably request
     of an


                                        9
<PAGE>

     amended or supplemented Prospectus which will correct such statement or
     omission or effect such compliance.

               (d)  To file promptly with the Commission any amendment to the
     Registration Statement or the Prospectus or any supplement to the
     Prospectus that may, in the judgment of the Company or the Representatives,
     be required by the Securities Act or requested by the Commission;

               (e)  Prior to filing with the Commission any amendment to the
     Registration Statement or supplement to the Prospectus, any document
     incorporated by reference in the Prospectus or any Prospectus pursuant to
     Rule 424 of the Rules and Regulations, to furnish a copy thereof to the
     Representatives and counsel for the International Managers and obtain the
     consent of the Representatives to the filing;

               (f)  As soon as practicable after the Effective Date, but in any
     event not later than fifteen months after the end of the Company's current
     fiscal quarter, to make generally available to the Company's security
     holders and to deliver to the Representatives an earnings statement of the
     Company and its subsidiaries (which need not be audited) complying with
     Section 11(a) of the Securities Act and the Rules and Regulations
     (including, at the option of the Company, Rule 158);

               (g)  For a period of five years following the Effective Date, to
     furnish to the Representatives copies of all materials furnished by the
     Company to its shareholders and all public reports and all reports and
     financial statements furnished by the Company to the principal national
     securities exchange upon which the Common Stock may be listed pursuant to
     requirements of or agreements with such exchange or to the Commission
     pursuant to the Exchange Act or any rule or regulation of the Commission
     thereunder;

               (h)  Promptly from time to time to take such action as the
     Representatives may reasonably request to qualify the Stock for offering
     and sale under the securities laws of such jurisdictions as the
     Representatives may request and to comply with such laws so as to permit
     the continuance of sales and dealings therein in such jurisdictions for as
     long as may be necessary to complete the distribution of the Stock PROVIDED
     that in connection therewith the Company shall not be required to qualify
     as a foreign corporation or to file a general consent to service of process
     in any jurisdiction;

               (i)  For a period of 90 days from the date of the Prospectus, not
     to offer for sale, sell or otherwise dispose of (or enter into any
     transaction which is designed to, or could be expected to, result in the
     disposition by any person of), directly or indirectly, any shares of Common
     Stock (other than the Stock and shares issued pursuant to employee benefit
     plans, qualified stock option plans or other employee compensation plans
     existing on the date hereof or pursuant to currently outstanding options,
     warrants or rights), or sell or grant options, rights or warrants with
     respect to any shares of Common Stock (other than the grant of options
     pursuant to option plans


                                       10
<PAGE>

     existing on the date hereof), without the prior written consent of Lehman
     Brothers International (Europe);

               (j)  Prior to the Effective Date, to apply for the inclusion of
     the Stock on the New York and Pacific Stock Exchanges, Inc. and to use its
     best efforts to complete that listing, subject only to official notice of
     issuance and evidence of satisfactory distribution, prior to the First
     Delivery Date;

               (k)  To apply the net proceeds from the sale of the Stock being
     sold by the Company as set forth in the Prospectus; and

               (l)  To take such steps as shall be necessary to ensure that
     neither the Company nor any subsidiary shall become an "investment company"
     within the meaning of such term under the United States Investment Company
     Act of 1940 and the rules and regulations of the Commission thereunder.

          6.   EXPENSES.  The Company agrees to pay (a) the costs incident to
the authorization, issuance, sale and delivery of the Stock and any taxes
payable in that connection; (b) the costs incident to the preparation, printing
and filing under the Securities Act of the Registration Statement and any
amendments and exhibits thereto; (c) the costs of distributing the Registration
Statement as originally filed and each amendment thereto and any post-effective
amendments thereof (including, in each case, exhibits), any Preliminary
Prospectus, the Prospectus and any amendment or supplement to the Prospectus or
any document incorporated by reference therein, all as provided in this
Agreement; (d) the costs of printing and distributing this Agreement, the
Agreement Between U.S. Underwriters and International Managers, any Supplemental
Agreement Among U.S. Underwriters and any other related documents in connection
with the offering, purchase, sale and delivery of the stock; (e) the filing fees
incident to securing any required review by the National Association of
Securities Dealers, Inc. of the terms of sale of the Stock; (f) any applicable
listing or other fees; (g) the fees and expenses (not in excess, in the
aggregate, of $10,000.00 of qualifying the Stock under the securities laws of
the several jurisdictions as provided in Section 5(h) and of preparing, printing
and distributing a Blue Sky Memorandum (including related fees and expenses of
counsel to the Underwriters); and (h) all other costs and expenses incident to
the performance of the obligations of the Company under this Agreement; PROVIDED
that, except as provided in this Section 6 and in Section 11 the U.S.
Underwriters shall pay their own costs and expenses, including the costs and
expenses of their counsel, any transfer taxes on the Stock which they may sell
and the expenses of advertising any offering of the Stock made by the
International Managers.

          7.   CONDITIONS OF INTERNATIONAL MANAGERS' OBLIGATIONS.  The
respective obligations of the International Managers hereunder are subject to
the accuracy, when made and on each Delivery Date, of the representations and
warranties of the Company contained herein, to the performance by the Company of
its obligations hereunder, and to each of the following additional terms and
conditions:

               (a)  The Prospectus shall have been timely filed with the
     Commission in accordance with Section 5(a); no stop order suspending the
     effectiveness of the


                                       11
<PAGE>

     Registration Statement or any part thereof shall have been issued and no
     proceeding for that purpose shall have been initiated or threatened by the
     Commission; and any request of the Commission for inclusion of additional
     information in the Registration Statement or the Prospectus or otherwise
     shall have been complied with.

               (b)  No U.S. Underwriter or International Manager shall have
     discovered and disclosed to the Company on or prior to such Delivery Date
     that the Registration Statement or the Prospectus or any amendment or
     supplement thereto contains an untrue statement of a fact which, in the
     opinion of Latham & Watkins, counsel for the U.S. Underwriters and the
     International Managers, is material or omits to state a fact which, in the
     opinion of such counsel, is material and is required to be stated therein
     or is necessary to make the statements therein not misleading.

               (c)  All corporate proceedings and other legal matters incident
     to the authorization, form and validity of this Agreement, the U.S.
     Underwriting Agreement, the Stock, the Registration Statement and the
     Prospectus, and all other legal matters relating to this Agreement and the
     transactions contemplated hereby shall be reasonably satisfactory in all
     material respects to counsel for the International Managers, and the
     Company shall have furnished to such counsel all documents and information
     that they may reasonably request to enable them to pass upon such matters.

               (d)  O'Melveny & Myers shall have furnished to the
     Representatives their written opinion, as counsel to the Company, addressed
     to the International Managers and dated such Delivery Date, in form and
     substance reasonably satisfactory to the Representatives, to the effect
     that:

                    (i)  The Company has been duly incorporated and is an
          existing corporation in good standing under the laws of its
          jurisdiction of incorporation and has full corporate power and
          authority to conduct its business as described in the Registration
          Statement and the Prospectus;

                    (ii) The shares of Stock have been duly authorized and
          validly issued, are fully paid and non-assessable and conform to the
          description thereof in the Prospectus; and the shareholders of the
          Company have no preemptive rights with respect to the shares of Stock
          being issued and sold by the Company hereunder;

                    (iii) The Registration Statement has become effective under
          the Act, the Prospectus has been filed as required by Section 1(a)
          hereof, and to the knowledge of such counsel no stop order suspending
          the effectiveness of the Registration Statement has been issued and no
          proceeding for that purpose has been instituted or threatened by the
          Commission;

                    (iv) Each part of the registration statement, when such part
          became effective, and the Prospectus and any amendment or supplement
          thereto, on the date of filing thereof with the Commission and at the
          Delivery Date,


                                       12
<PAGE>

          appeared on their face to comply as to form in all material respects
          with the requirements of the Securities Act and the Rules and
          Regulations, and the documents incorporated by reference in the
          Registration Statement or the Prospectuses or any amendment or
          supplement thereto, when they became effective under the Securities
          Act or were filed with the Commission under the Exchange Act, as the
          case may be, in either case to the extent amended, appeared on their
          face to comply as to form in all material respects with the
          requirements of the Securities Act or the Exchange Act, as applicable,
          and the rules and regulations of the Commission thereunder, it being
          understood that such counsel need express no opinion as to the
          financial statements or other financial data included or required to
          be included in any of the documents mentioned in this clause;

                    (v)  The descriptions in the Registration Statement and the
          Prospectus of statutes, legal and governmental proceedings, contracts
          and other documents are accurate and fairly present the information
          required to be shown; and such counsel do not know of any statutes or
          legal or governmental proceedings required to be described in the
          Prospectus that are not described as required, or of any contracts or
          documents of a character required to be described in the Registration
          Statement or the Prospectus (or required to be filed under the
          Exchange Act if upon such filing they would be incorporated by
          reference therein) or to be filed as exhibits to the Registration
          Statement that are not described or filed as required; and

                    (vi) This Agreement and the U.S. Underwriting Agreement have
          been duly authorized, executed and delivered by the Company, the
          performance of this Agreement and the U.S. Underwriting Agreement and
          the consummation of the transactions herein and therein contemplated
          (except for the provisions of Section 8 herein and therein as to which
          no opinion need be expressed) will not result in a breach or violation
          of any of the terms and provisions of, or constitute a default under,
          any statute, any agreement or instrument known to such counsel to
          which the Company is a party or by which it is bound or to which any
          of the property of the Company is subject, the Company's charter or
          by-laws, or any order, rule or regulation known to such counsel of any
          court or governmental agency or body having jurisdiction over the
          Company or any of its properties; and no consent, approval,
          authorization or order of, or filing with, any court or governmental
          agency or body is required for the consummation of the transactions
          contemplated by this Agreement and the U.S. Underwriting Agreement in
          connection with the issuance or sale of the shares of Stock to be sold
          by the Company, except such as have been obtained under the Securities
          Act and such as may be required under state or foreign securities laws
          in connection with the purchase and distribution of such shares of
          Stock by the U.S. Underwriters or the International Managers.

               In addition, such counsel shall state that in connection with its
     participation in the preparation of the Registration Statement and the
     Prospectus and any amendment


                                       13
<PAGE>

     or supplement thereto it has not independently verified the accuracy,
     completeness or fairness of the statements contained therein, and the
     limitations inherent in the examination made by such counsel and the
     knowledge available to it are such that they are unable to assume, and do
     not assume, any responsibility for the accuracy, completeness or fairness
     of the statements contained in the Registration Statement or the
     Prospectuses and any amendment or supplement thereto; however, on the basis
     of their examination and participation in conferences at which the contents
     of the Registration Statement and the Prospectus and any amendment or
     supplement thereto and related matters were discussed, such counsel has no
     reason to believe that either any part of the registration statement, when
     such part became effective, or the Prospectus and any amendment or
     supplement thereto, on the date of filing thereof with the Commission or at
     the Delivery Date, included an untrue statement of a material fact or
     omitted to state a material fact necessary to make the statements therein,
     in the light of the circumstances under which they were made, not
     misleading, it being understood that such counsel need express no opinion
     as to the financial statements or other financial data included or required
     to be included in any of the documents mentioned in this paragraph.

               Such counsel need not express any opinion as to the availability
     of equitable remedies or as to laws other than California and federal law
     and the corporate law of the State of Delaware.  In giving such opinion,
     such counsel may rely on certificates of public officials and officers of
     the Company as to matters of fact, in which case the opinion shall state
     that such counsel has no reason to believe that they and the International
     Managers are not entitled to so rely on such certificates.

               (e)  Counsel for each Significant Subsidiary shall have furnished
     to the Representatives their written opinion addressed to the International
     Managers and dated such Delivery Date, in form and substance reasonably
     satisfactory to the Representatives, to the effect that:

                    (i)  Such Significant Subsidiary is a corporation duly
          organized, validly existing and in good standing under the laws of the
          jurisdiction of its incorporation.  Such Significant Subsidiary has
          the corporate power and authority to conduct all of the activities
          conducted by it, to own or lease all of the assets owned or leased by
          it and to conduct its business as described in the Registration
          Statement and the Prospectus; and is duly licensed or qualified to do
          business and in good standing as a foreign corporation in all
          jurisdictions in which the nature of the activities conducted by it
          and/or the character of the assets owned and leased by it makes such
          license or qualification necessary, except for those failures to be so
          qualified or licensed or in good standing which will not have a
          material adverse effect on such Significant Subsidiary.

                    (ii) The execution and delivery of this Agreement and the
          U.S. Underwriting Agreement by the Company, the consummation by the
          Company of the transactions herein and therein contemplated and the
          compliance with the terms of this Agreement and the U.S. Underwriting
          Agreement do not and will not conflict with or result in a breach of
          any of the terms or provisions of, or


                                       14
<PAGE>

          constitute a default under, the charter or bylaws of such Significant
          Subsidiary or any indenture, mortgage or other agreement or instrument
          known to such counsel to which such Significant Subsidiary is a party
          or by which such Significant Subsidiary or any of its properties are
          bound, or any existing law, rule, regulation, judgment, order or
          decree of any government, governmental instrumentality or court,
          domestic or foreign, having jurisdiction over such Significant
          Subsidiary or any of its properties.

                    (iii)  All of the issued and outstanding shares of the
          capital stock of such Significant Subsidiary, other than director's
          qualifying shares, are owned of record by the Company, and, to the
          knowledge of such counsel, such shares are beneficially owned by the
          Company free and clear of all mortgages, pledges, liens, security
          interests, conditional sale agreements, charges, encumbrances and
          restrictions of every nature; and all of such shares are validly
          issued, fully paid and non-assessable.

     Such opinion shall be to such further effect with respect to other legal
     matters relating to this Agreement and the U.S. Underwriting Agreement and
     the sale of the Shares hereunder and thereunder as counsel for the
     International Managers may reasonably request.  In giving such opinion,
     such counsel may rely on certificates of public officials and officers of
     the applicable Significant Subsidiary as to matters of fact, in which case
     the opinion shall state that such counsel has no reason to believe that
     they and the International Managers are not entitled to so rely on such
     certificates.

               (f)  The Representatives shall have received from Latham &
     Watkins, counsel for the International Managers, such opinion or opinions,
     dated such Delivery Date, with respect to the issuance and sale of the
     Stock, the Registration Statement, the Prospectus and other related matters
     as the Representatives may reasonably require, and the Company shall have
     furnished to such counsel such documents as they reasonably request for the
     purpose of enabling them to pass upon such matters.

               (g)  At the time of execution of this Agreement, the
     Representatives shall have received from Coopers & Lybrand a letter, in
     form and substance satisfactory to the Representatives, addressed to the
     International Managers and dated the date hereof stating, as of the date
     hereof (or, with respect to matters involving changes or developments since
     the respective dates as of which specified financial information is given
     in the Prospectus, as of a date not more than five days prior to the date
     hereof), the conclusions and findings of such firm with respect to the
     financial information and other matters ordinarily covered by accountants'
     "comfort letters" to underwriters in connection with registered public
     offerings.

               (h)  With respect to the letter of Coopers & Lybrand referred to
     in the preceding paragraph and delivered to the Representatives
     concurrently with the execution of this Agreement (the "initial letter"),
     the Company shall have furnished to the Representatives a letter (the
     "bring-down letter") of such accountants, addressed to the International
     Managers and dated such Delivery Date (i) confirming that they are


                                       15
<PAGE>

     independent public accountants within the meaning of the Securities Act and
     are in compliance with the applicable requirements relating to the
     qualification of accountants under Rule 2-01 of Regulation S-X of the
     Commission, (ii) stating, as of the date of the bring-down letter (or, with
     respect to matters involving changes or developments since the respective
     dates as of which specified financial information is given in the
     Prospectus, as of a date not more than five days prior to the date of the
     bring-down letter), the conclusions and findings of such firm with respect
     to the financial information and other matters covered by the initial
     letter and (iii) confirming in all material respects the conclusions and
     findings set forth in the initial letter.

               (i)  The Company shall have furnished to the Representatives a
     certificate, dated such Delivery Date, executed by its Chairman of the
     Board, its President or a Vice President and its Chief Financial Officer
     stating that:

                    (i)  The representations, warranties and agreements of the
          Company in Section 1 are true and correct as of such Delivery Date;
          the Company has complied with all its agreements contained herein; and
          the conditions set forth in Sections 7(a) and 7(j) have been
          fulfilled; and

                    (ii) They have carefully examined the Registration Statement
          and the Prospectus and, in their opinion since the Effective Date no
          event has occurred which should have been set forth in a supplement or
          amendment to the Registration Statement or the Prospectus.

               (j)  Neither the Company nor any of its subsidiaries shall have
     sustained since the date of the latest audited financial statements
     included or incorporated by reference in the Prospectus any loss or
     interference with its business from fire, explosion, flood or other
     calamity, whether or not covered by insurance, or from any labor dispute or
     court or governmental action, order or decree, otherwise than as set forth
     or contemplated in the Prospectus, and since such date there shall not have
     been any change in the capital stock or long-term debt of the Company or
     any of its subsidiaries, other than in the ordinary course of business,
     that is material to the Company and its subsidiaries taken as a whole or
     any change, or any development involving a prospective change, in or
     affecting the general affairs, management, financial position,
     stockholders' equity or results of operations of the Company and its
     subsidiaries, otherwise than as set forth or contemplated in the
     Prospectus, the effect of which, in any such case described in this Section
     (j), is, in the judgment of the Representatives, so material and adverse as
     to make it impracticable or inadvisable to proceed with the public offering
     or the delivery of the Stock being delivered on such Delivery Date on the
     terms and in the manner contemplated in the Prospectus.

               (k)  Subsequent to the execution and delivery of this Agreement
     there shall not have occurred any of the following:  (i) trading in
     securities generally on the New York Stock Exchange or the American Stock
     Exchange or in the over-the-counter market, or trading in any securities of
     the Company on any exchange or in the over-the-counter market, shall have
     been wholly suspended or minimum prices shall have been


                                       16
<PAGE>

     established on any such exchange or such market by the Commission, by such
     exchange or by any other regulatory body or governmental authority having
     jurisdiction, (ii) a banking moratorium shall have been declared by Federal
     or state authorities, (iii) the United States shall have become engaged in
     hostilities, there shall have been an escalation in hostilities involving
     the United States or there shall have been a declaration of a national
     emergency or war by the United States or (iv) there shall have occurred
     such a substantial national or international calamity or other event or
     occurrence of a similar nature as to make it, in the judgment of a majority
     in interest of the several Underwriters, impracticable or inadvisable to
     proceed with the public offering or delivery of the Stock being delivered
     on such Delivery Date on the terms and in the manner contemplated in the
     Prospectus.

               (l)  The New York and Pacific Stock Exchanges shall have approved
     the Stock for inclusion, subject only to official notice of issuance.

               (m)  The closing under the U.S. Underwriting Agreement shall have
     occurred concurrently with the closing hereunder on the First Delivery
     Date.

          All opinions, letters, evidence and certificates mentioned above or
elsewhere in this Agreement shall be deemed to be in compliance with the
provisions hereof only if they are in form and substance reasonably satisfactory
to counsel for the International Managers.

          8.   INDEMNIFICATION AND CONTRIBUTION

               (a)  The Company shall indemnify and hold harmless each
     International Manager and each person, if any, who controls any
     International Manager within the meaning of the Securities Act, from and
     against any loss, claim, damage or liability, joint or several, or any
     action in respect thereof (including, but not limited to, any loss, claim,
     damage, liability or action relating to purchases and sales of Stock), to
     which that International Manager or controlling person may become subject,
     under the Securities Act or otherwise, insofar as such loss, claim, damage,
     liability or action arises out of, or is based upon, (i) any untrue
     statement or alleged untrue statement of a material fact contained in any
     Preliminary Prospectus, the Registration Statement or the Prospectus or in
     any amendment or supplement thereto or (ii) the omission or alleged
     omission to state therein a material fact required to be stated therein or
     necessary to make the statements therein not misleading, and shall
     reimburse each International Manager and each such controlling person
     promptly upon demand for any legal or other expenses reasonably incurred by
     that International Manager or controlling person in connection with
     investigating or defending or preparing to defend against any such loss,
     claim, damage, liability or action as such expenses are incurred; PROVIDED,
     HOWEVER, that the Company shall not be liable in any such case to the
     extent that any such loss, claim, damage, liability or action arises out
     of, or is based upon, any untrue statement or alleged untrue statement or
     omission or alleged omission made in any Preliminary Prospectus, the
     Registration Statement or the Prospectus or in any such amendment or
     supplement in reliance upon and in conformity with written information
     furnished to the Company through the Representatives by or on behalf of any
     International Manager specifically for


                                       17
<PAGE>

     inclusion therein; and provided further that the Company shall not be
     liable to any International Manager under the indemnity agreement in this
     subsection (a) with respect to any Preliminary Prospectus to the extent
     that any such loss, claim, damage or liability of such International
     Manager results solely from an untrue statement of a material fact
     contained in, or the omission of a material fact from, such Preliminary
     Prospectus which untrue statement or omission was corrected in the U.S.
     Prospectus or the International Prospectus or both, as the case may be, if
     the Company shall sustain the burden of proving that such International
     Manager sold Securities to the person alleging such loss, claim, damage or
     liability without sending or giving, at or prior to the written
     confirmation of such sale, a copy of the U.S. Prospectus or the
     International Prospectus or both, as the case may be (exclusive of the
     documents from which information is incorporated by reference) (or of the
     Prospectus as then amended or supplemented), if the Company had previously
     furnished copies thereof to such International Manager.  The foregoing
     indemnity agreement is in addition to any liability which the Company may
     otherwise have to any International Manager or to any controlling person of
     that International Manager.

               (b)  Each International Manager, severally and not jointly, shall
     indemnify and hold harmless the Company, each of its directors, each of its
     officers who signed the Registration Statement and each person, if any, who
     controls the Company within the meaning of the Securities Act, from and
     against any loss, claim, damage or liability, joint or several, or any
     action in respect thereof, to which the Company or any such director,
     officer or controlling person may become subject, under the Securities Act
     or otherwise, insofar as such loss, claim, damage, liability or action
     arises out of, or is based upon, (i) any untrue statement or alleged untrue
     statement of a material fact contained in any Preliminary Prospectus, the
     Registration Statement or the Prospectus or in any amendment or supplement
     thereto or (ii) the omission or alleged omission to state therein a
     material fact required to be stated therein or necessary to make the
     statements therein not misleading, but in each case only to the extent that
     the untrue statement or alleged untrue statement or omission or alleged
     omission was made in reliance upon and in conformity with written
     information furnished to the Company through the Representatives by or on
     behalf of that International Manager specifically for inclusion therein,
     and shall reimburse the Company and any such director, officer or
     controlling person for any legal or other expenses reasonably incurred by
     the Company or any such director, officer or controlling person in
     connection with investigating or defending or preparing to defend against
     any such loss, claim, damage, liability or action as such expenses are
     incurred.  The foregoing indemnity agreement is in addition to any
     liability which any International Manager may otherwise have to the Company
     or any such director, officer or controlling person.

               (c)  Promptly after receipt by an indemnified party under this
     Section 8 of notice of any claim or the commencement of any action, the
     indemnified party shall, if a claim in respect thereof is to be made
     against the indemnifying party under this Section 8, notify the
     indemnifying party in writing of the claim or the commencement of that
     action; PROVIDED, HOWEVER, that the failure to notify the indemnifying
     party shall not relieve it from any liability which it may have under this
     Section 8 except to the


                                       18
<PAGE>

     extent it has been materially prejudiced by such failure and, PROVIDED
     FURTHER, that the failure to notify the indemnifying party shall not
     relieve it from any liability which it may have to an indemnified party
     otherwise than under this Section 8.  If any such claim or action shall be
     brought against an indemnified party, and it shall notify the indemnifying
     party thereof, the indemnifying party shall be entitled to participate
     therein and, to the extent that it wishes, jointly with any other similarly
     notified indemnifying party, to assume the defense thereof with counsel
     reasonably satisfactory to the indemnified party.  After notice from the
     indemnifying party to the indemnified party of its election to assume the
     defense of such claim or action, the indemnifying party shall not be liable
     to the indemnified party under this Section 8 for any legal or other
     expenses subsequently incurred by the indemnified party in connection with
     the defense thereof other than reasonable costs of investigation; PROVIDED,
     HOWEVER, that the Representatives shall have the right to employ counsel to
     represent jointly the Representatives and those other International
     Managers and their respective controlling persons who may be subject to
     liability arising out of any claim in respect of which indemnity may be
     sought by the International Managers against the Company under this Section
     8 if, in the reasonable judgment of counsel to the Representatives, it is
     advisable for the Representatives and those International Managers and
     controlling persons to be jointly represented by separate counsel, and in
     that event the fees and expenses of such separate counsel shall be paid by
     the Company.  An indemnifying party will not, without the prior written
     consent of the indemnified parties (which consent shall not be unreasonably
     withheld), settle or compromise or consent to the entry of any judgment
     with respect to any pending or threatened claim, action, suit or proceeding
     in respect of which indemnification or contribution may be sought hereunder
     (whether or not the indemnified parties are actual or potential parties to
     such claim or action) unless such settlement, compromise or consent
     includes an unconditional release of each indemnified party from all
     liability arising out of such claim, action, suit or proceeding.  An
     indemnified party will not, without the prior written consent of the
     indemnifying party (which consent shall not be unreasonably withheld),
     settle or compromise any such action, but if settled with the consent of
     the indemnifying party or if there be a final judgment for the plaintiff in
     any such action, the indemnifying party agrees to indemnify and hold
     harmless any indemnified party from and against any loss or liability by
     reason of such settlement or judgment.

               (d)  If the indemnification provided for in this Section 8 shall
     for any reason be unavailable to or insufficient to hold harmless an
     indemnified party under Section 8(a) or 8(b) in respect of any loss, claim,
     damage or liability, or any action in respect thereof, referred to therein,
     then each indemnifying party shall, in lieu of indemnifying such
     indemnified party, contribute to the amount paid or payable by such
     indemnified party as a result of such loss, claim, damage or liability, or
     action in respect thereof, (i) in such proportion as shall be appropriate
     to reflect the relative benefits received by the Company on the one hand
     and the International Managers on the other from the offering of the Stock
     or (ii) if the allocation provided by clause (i) above is not permitted by
     applicable law, in such proportion as is appropriate to reflect not only
     the relative benefits referred to in clause (i) above but also the relative
     fault of the Company on the one hand and the International Managers on the
     other with respect to the


                                       19
<PAGE>

     statements or omissions which resulted in such loss, claim, damage or
     liability, or action in respect thereof, as well as any other relevant
     equitable considerations.  The relative benefits received by the Company on
     the one hand and the International Managers on the other with respect to
     such offering shall be deemed to be in the same proportion as the total net
     proceeds from the offering of the Stock purchased under this Agreement
     (before deducting expenses) received by the Company on the one hand, and
     the total underwriting discounts and commissions received by the
     International Managers with respect to the shares of the Stock purchased
     under this Agreement, on the other hand, bear to the total gross proceeds
     from the offering of the shares of the Stock under this Agreement, in each
     case as set forth in the table on the cover page of the Prospectus.  The
     relative fault shall be determined by reference to whether the untrue or
     alleged untrue statement of a material fact or omission or alleged omission
     to state a material fact relates to information supplied by the Company or
     the International Managers, the intent of the parties and their relative
     knowledge, access to information and opportunity to correct or prevent such
     statement or omission.  The International Managers agree that it would not
     be just and equitable if contributions pursuant to this Section  were to be
     determined by pro rata allocation (even if the International Managers were
     treated as one entity for such purpose) or by any other method of
     allocation which does not take into account the equitable considerations
     referred to herein.  The amount paid or payable by an indemnified party as
     a result of the loss, claim, damage or liability, or action in respect
     thereof, referred to above in this Section 8(d) shall be deemed to include,
     for purposes of this Section 8(d), any legal or other expenses reasonably
     incurred by such indemnified party in connection with investigating or
     defending any such action or claim.  Notwithstanding the provisions of this
     Section 8(d), no International Manager shall be required to contribute any
     amount in excess of the amount by which the total price at which the Stock
     underwritten by it and distributed to the public was offered to the public
     exceeds the amount of any damages which such International Manager has
     otherwise paid or become liable to pay by reason of any untrue or alleged
     untrue statement or omission or alleged omission.  No person guilty of
     fraudulent misrepresentation (within the meaning of Section 11(f) of the
     Securities Act) shall be entitled to contribution from any person who was
     not guilty of such fraudulent misrepresentation.  The International
     Managers' obligations to contribute as provided in this Section 8(d) are
     several in proportion to their respective underwriting obligations and not
     joint.

               (e)  The International Managers severally confirm that the
     statements with respect to the public offering of the Stock set forth on
     the cover page of, and under the caption "Underwriting" in, the Prospectus
     are correct and constitute the only information furnished in writing to the
     Company by or on behalf of the International Managers specifically for
     inclusion in the Registration Statement and the Prospectus.

          9.   DEFAULTING UNDERWRITERS.  If, on either Delivery Date, any
International Manager defaults in the performance of its obligations under this
Agreement, the remaining non-defaulting International Managers shall be
obligated to purchase the Stock which the defaulting International Manager
agreed but failed to purchase on such Delivery Date in the respective
proportions which the number of shares of the Firm Stock set forth opposite the
name of each remaining non-defaulting International Manager in Schedule 1 hereto
bears to the total number


                                       20
<PAGE>

of shares of the Firm Stock set forth opposite the names of all the remaining
non-defaulting International Managers in Schedule 1 hereto; PROVIDED, HOWEVER,
that the remaining non-defaulting International Managers shall not be obligated
to purchase any of the Stock on such Delivery Date if the total number of shares
of the Stock which the defaulting International Manager or International
Managers agreed but failed to purchase on such date exceeds 9.09% of the total
number of shares of the Stock to be purchased on such Delivery Date, and any
remaining non-defaulting International Manager shall not be obligated to
purchase more than 110% of the number of shares of the Stock which it agreed to
purchase on such Delivery Date pursuant to the terms of Section 2.  If the
foregoing maximums are exceeded, the remaining non-defaulting International
Managers, or those other underwriters satisfactory to the Representatives who so
agree, shall have the right, but shall not be obligated, to purchase, in such
proportion as may be agreed upon among them, all the Stock to be purchased on
such Delivery Date.  If the remaining International Managers or other
underwriters satisfactory to the Representatives do not elect to purchase the
shares which the defaulting International Manager or International Managers
agreed but failed to purchase on such Delivery Date, this Agreement (or, with
respect to the Second Delivery Date, the obligation of the International
Managers to purchase, and of the Company to sell, the Option Stock) shall
terminate without liability on the part of any non-defaulting Underwriter or the
Company, except that the Company will continue to be liable for the payment of
expenses to the extent set forth in Sections 6 and 11.  As used in this
Agreement, the term "International Manager" includes, for all purposes of this
Agreement unless the context requires otherwise, any party not listed in
Schedule 1 hereto who, pursuant to this Section 9, purchases Firm Stock which a
defaulting International Manager agreed but failed to purchase.

          Nothing contained herein shall relieve a defaulting International
Manager of any liability it may have to the Company for damages caused by its
default.  If other underwriters are obligated or agree to purchase the Stock of
a defaulting or withdrawing International Manager, either the Representatives or
the Company may postpone the Delivery Date for up to seven full business days in
order to effect any changes that in the opinion of counsel for the Company or
counsel for the International Managers may be necessary in the Registration
Statement, the Prospectus or in any other document or arrangement.

          10.  TERMINATION.  The obligations of the International Managers
hereunder may be terminated by the Representatives by notice given to and
received by the Company prior to delivery of and payment for the International
Stock if, prior to that time, any of the events described in Section 7(i), shall
have occurred or if the International Managers shall decline to purchase the
Stock for any reason permitted under this Agreement.

          11.  REIMBURSEMENT OF UNDERWRITERS' EXPENSES.  If the sale of the
International Stock provided for herein is not consummated by reason of any
failure, refusal or inability on the part of the Company to perform any
agreement on its part to be performed, or because any other condition of the
International Managers' obligations hereunder required to be fulfilled by the
Company is not fulfilled, the Company will reimburse the International Managers
for all reasonable out-of-pocket expenses (including fees and disbursements of
counsel) incurred by the International Managers in connection with this
Agreement and the proposed purchase of the Stock, and upon demand the Company
shall pay the full amount thereof to the Representatives.


                                       21
<PAGE>

          12.  NOTICES, ETC.  All statements, requests, notices and agreements
hereunder shall be in writing, and:

               (a)  if to the International Managers, shall be delivered or sent
     by mail, telex or facsimile transmission to Lehman Brothers Inc., Three
     World Financial Center, New York, New York 10285, Attention:  Syndicate
     Department (Fax: 212-528-8822), with a copy, in the case of any notice
     pursuant to Section 11(d), to the Director of Litigation, Office of the
     General Counsel, Lehman Brothers Inc., 2 World Trade Center, 15th Floor,
     New York, NY 10048;

               (b)  if to the Company shall be delivered or sent by mail, telex
     or facsimile transmission to the address of the Company set forth in the
     Registration Statement, Attention: Lesley Kleveter (Fax: 310-607-8844);

PROVIDED, HOWEVER, that any notice to an International Manager pursuant to
Section 8(c) shall be delivered or sent by mail, telex or facsimile transmission
to such International Manager at its address set forth in its acceptance telex
to the Representatives, which address will be supplied to any other party hereto
by the Representatives upon request.  Any such statements, requests, notices or
agreements shall take effect at the time of receipt thereof.  The Company shall
be entitled to act and rely upon any request, consent, notice or agreement given
or made on behalf of the International Managers by Lehman Brothers Inc. on
behalf of the Representatives.

          13.  PERSONS ENTITLED TO BENEFIT OF AGREEMENT.  This Agreement shall
inure to the benefit of and be binding upon the International Managers, the
Company, and their respective successors.  This Agreement and the terms and
provisions hereof are for the sole benefit of only those persons, except that
(A) the representations, warranties, indemnities and agreements of the Company
contained in this Agreement shall also be deemed to be for the benefit of the
person or persons, if any, who control any International Manager within the
meaning of Section 15 of the Securities Act and for the benefit of each
International Manager (and controlling persons thereof) who offers or sells any
shares of Common Stock in accordance with the terms of the Agreement between
U.S. Underwriter and International Managers and (B) the indemnity agreement of
the International Managers contained in Section 8(b) of this Agreement shall be
deemed to be for the benefit of directors of the Company, officers of the
Company who have signed the Registration Statement and any person controlling
the Company within the meaning of Section 15 of the Securities Act.  Nothing in
this Agreement is intended or shall be construed to give any person, other than
the persons referred to in this Section 13, any legal or equitable right, remedy
or claim under or in respect of this Agreement or any provision contained
herein.

          14.  SURVIVAL.  The respective indemnities, representations,
warranties and agreements of the Company and the International Managers
contained in this Agreement or made by or on behalf on them, respectively,
pursuant to this Agreement, shall survive the delivery of and payment for the
Stock and shall remain in full force and effect, regardless of any investigation
made by or on behalf of any of them or any person controlling any of them.


                                       22
<PAGE>

          15.  DEFINITION OF THE TERM "BUSINESS DAY."  For purposes of this
Agreement, "business day" means any day on which the New York Stock Exchange,
Inc. is open for trading.

          16.  GOVERNING LAW.  THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE LAWS OF NEW YORK.

          17.  COUNTERPARTS.  This Agreement may be executed in one or more
counterparts and, if executed in more than one counterpart, the executed
counterparts shall each be deemed to be an original but all such counterparts
shall together constitute one and the same instrument.

          18.  HEADINGS.  The headings herein are inserted for convenience of
reference only and are not intended to be part of, or to affect the meaning or
interpretation of, this Agreement.

          19.  MISCELLANEOUS.  Each International Manager hereby agrees with the
Company and the Selling Stockholders that:

               (a)  It has not offered or sold and will not offer or sell any
     Shares in the United Kingdom by means of any documents, other than to
     persons whose ordinary business it is to buy or sell shares or debentures,
     whether as principal or agent (except in circumstances which do not
     constitute an offer to the public within the meaning of the Companies Act
     1985);

               (b)  It will comply with all applicable provisions of the
     Financial Services Act 1986 and with the rules and regulations of any
     relevant regulatory body or authority with respect to anything done by it
     in relation to the Shares in, from or otherwise involving the United
     Kingdom; and


                                       23
<PAGE>

               (c)  It will only issue or distribute to any person in the United
     Kingdom any document relating to the issue of the Shares if that person is
     of a kind described in Article 9(3) of the Financial Services Act 1986
     (Investment Advertisements) (Exemptions) Order 1988.

          If the foregoing correctly sets forth the agreement between the
Company and the International Managers, please indicate your acceptance in the
space provided for that purpose below.

                                   Very truly yours,

                                   INTERNATIONAL RECTIFIER CORPORATION


                                   By
                                      ---------------------------------------
                                        Eric Lidow
                                        President and Chief Executive Officer

LEHMAN BROTHERS INTERNATIONAL (EUROPE)
KIDDER, PEABODY INTERNATIONAL PLC
MONTGOMERY SECURITIES
PAINEWEBBER INTERNATIONAL (U.K.) LTD.
SMITH BARNEY INC.

For themselves and as Representatives
of the several Underwriters named
in Schedule 1 hereto

By LEHMAN BROTHERS INC.


 By
    ----------------------------------
          H. Brooks Dexter


                                       24
<PAGE>

                                   SCHEDULE 1


                                                       Number of
     Underwriters                                        Shares
     ------------                                      ---------

     Lehman Brothers International (Europe). . .
     Kidder Peabody International PLC. . . . . .
     Montgomery Securities . . . . . . . . . . .
     PaineWebber International (U.K.) Ltd. . . .
     Smith Barney Inc. . . . . . . . . . . . . .

                                                         -------
          Total. . . . . . . . . . . . . . . . .         900,000
                                                         -------
                                                         -------

                                      1 - 1
<PAGE>

                                   SCHEDULE 2

                                                       Number of
     Underwriters                                        Shares
     ------------                                      ---------

     Lehman Brothers Inc.. . . . . . . . . . . .
     Kidder Peabody & Co. Incorporated . . . . .
     Montgomery Securities . . . . . . . . . . .
     PaineWebber Incorporated. . . . . . . . . .
     Smith Barney Inc. . . . . . . . . . . . . .

                                                       ---------
          Total. . . . . . . . . . . . . . . . .       3,600,000
                                                       ---------
                                                       ---------


                                      2 - 1

<PAGE>
                         [O'MELVENY & MYERS LETTERHEAD]

                                      November
                                      14th
                                      1994

International Rectifier Corporation
233 Kansas Street
El Segundo, California 90245

Ladies and Gentlemen:

    At  your request  we have  examined the  Registration Statement  on Form S-3
(Registration No. 33-56245) filed by you on October 28, 1994 (the  "Registration
Statement")  with  the  Securities  and  Exchange  Commission.  The Registration
Statement was filed in connection with the registration under the Securities Act
of 1933, as amended, of 4,500,000 shares  of your Common Stock, $1.00 par  value
per  share ("Common Stock"), of which 3,600,000 shares will initially be sold by
you to  Lehman Brothers  Inc., Kidder,  Peabody &  Co. Incorporated,  Montgomery
Securities,  PaineWebber  Incorporated,  Smith  Barney  Inc.  and  certain other
underwriters named therein  for offering in  the United States  and Canada  (the
"U.S. Underwriters"), and 900,000 shares will initially be sold by you to Lehman
Brothers  International (Europe), Kidder,  Peabody International PLC, Montgomery
Securities, PaineWebber International (U.K.) Ltd., Smith Barney Inc. and certain
other  underwriters   named   therein   (with   the   U.S.   Underwriters,   the
"Underwriters") for offering outside the United States and Canada; an additional
675,000   shares  may  be   sold  to  the  Underwriters   upon  exercise  of  an
over-allotment option (all  of such shares  of Common  Stock to be  sold by  you
referred to as the "Securities").

    We  are  familiar  with  the  proceedings  heretofore  taken,  and  with the
additional proceedings  proposed to  be taken,  by you  in connection  with  the
authorization and proposed issuance and sale of the Securities.

    It  is  our opinion  that, subject  to  the Registration  Statement becoming
effective and to said proceedings being duly  taken and completed by you as  now
contemplated by us as your counsel prior to the issuance of the Securities, upon
the issuance and sale by you of the Securities in the manner contemplated by the
Registration Statement, the Securities will be legally and validly issued, fully
paid and nonassessable securities of International Rectifier Corporation.

    We  consent to  the use of  this opinion  as an exhibit  to the Registration
Statement and to the reference to our firm in the Prospectuses which are a  part
of the Registration Statement under the caption "Legal Opinions."

                                          Respectfully submitted,
                                          O'MELVENY & MYERS

                                   Exhibit 5


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