FAQ

  1. Who is International Rectifier’s transfer agent and how does a registered shareholder contact the agent regarding account information?

  2. Does International Rectifier offer a Dividend Reinvestment Program (DRIP) for its common stock shareholders?

  3. Does International Rectifier offer a Direct Stock Purchase (DSP) program?

  4. When does the fiscal year end?

  5. When is International Rectifier’s Annual Shareholders’ Meeting?

  6. When will shareholders receive their copy of the annual report?

  7. How can I get a copy of International Rectifier’s annual report?

  8. How many employees does International Rectifier have?

  9. What is the CUSIP number for International Rectifier’s common stock?

  10. What year was International Rectifier incorporated and in what state? Where is it headquartered?

  11. When was International Rectifier’s initial public offering?

  12. What is International Rectifier 's trading symbol?

  13. Where is International Rectifier 's common stock traded?

  14. Who are the independent auditors for International Rectifier?

  15. What is International Rectifier’s stock split history?

  16. What key acquisitions has International Rectifier made?

1. Who is International Rectifier’s transfer agent and how does a registered shareholder contact the agent regarding account information?

Mellon Investor Services LLC.

There are three ways to contact Mellon:
- via the internet at www.melloninvestor.com
- by phone - 1 800 356-2017 or
- in writing at -
Mellon Investor Services
85 Challenger Road
Ridgefield Park, NJ 07660
2. Does International Rectifier offer a Dividend Reinvestment Program (DRIP) for its common stock shareholders?

No. The company does not pay a dividend.
3. Does International Rectifier offer a Direct Stock Purchase (DSP) program?

No
4. When does the fiscal year end?

International Rectifier operates on a fiscal year ending June.
5. When is International Rectifier’s Annual Shareholders’ Meeting?

The meeting is expected to be held in November 2010.
6. When will shareholders receive their copy of the annual report?

Shareholders receive the annual report by November of each year.
7. How can I get a copy of International Rectifier’s annual report?

A copy of our annual report may be obtained upon written request to:

International Rectifier Corporation
Investor Relations Dept.
233 Kansas Street
El Segundo, CA 90245

Or, via phone or email request:
310.726.8356
investorinfo@irf.com
8. How many employees does International Rectifier have?

Approximately 5800 in 20 countries.
9. What is the CUSIP number for International Rectifier’s common stock?

International Rectifier’s CUSIP number is 460254 10 5
10. What year was International Rectifier incorporated and in what state? Where is it headquartered?

International Rectifier was founded in California in 1947 and was re-incorporated in Delaware in 1979. Worldwide headquarters are located in El Segundo, California.
11. When was International Rectifier’s initial public offering?

1958
12. What is International Rectifier 's trading symbol?

IRF
13. Where is International Rectifier 's common stock traded?

On the New York Stock Exchange.
14. Who are the independent auditors for International Rectifier?

PricewaterhouseCoopers LLP
350 South Grand Avenue
Los Angeles, CA 90071
15. What is International Rectifier’s stock split history?

9/30/83 (payable 10/28/83) 2 for 1
11/27/84 (payable 12/14/84) 3 for 2
12/1/95 (payable 12/22/95) 2 for 1
16. What key acquisitions has International Rectifier made?

Unisem http://www.irf.com/whats-new/archive/nr001205.html
Omnirel / Zing http://www.irf.com/whats-new/archive/nr000128.html
TechnoFusion http://www.irf.com/whats-new/archive/nr020415.html
ATMI Epitaxial Services Operation http://www.irf.com/whats-new/nr040629.html