8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported)		October 11, 2005
INTERNATIONAL RECTIFIER CORPORATION
(Exact name of registrant as specified in its charter)
Delaware	1-7935				95-1528961
(State or other jurisdiction of incorporation)	(Commission File Number)				(IRS Employer Identification No.)
233 KANSAS STREET, EL SEGUNDO, CALIFORNIA				90245
(Address of principal executive offices)				(Zip Code)
Registrant’s telephone number, including area code			310-726-8000
NO CHANGE
(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01 Other Events

On October 11, 2005 International Rectifier Corporation (“IR”) issued a press release regarding the matter of IR versus IXYS Corporation.  A copy of the press release is furnished as Exhibit 99.1 to this report and incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits

(c)   Exhibits

Exhibit No.	Description
99.1	Press release of International Rectifier Corporation (“IR”), dated October 11, 2005, regarding the matter of IR versus IXYS Corporation.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	INTERNATIONAL RECTIFIER CORPORATION
Date: October 11, 2005	By:	/s/   DONALD R. DANCER
		Name:	Donald R. Dancer
		Title:	Secretary and General Counsel

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EX-99.1

Exhibit 99.1

International Rectifier Awarded $6.2 Million in IXYS Patent Infringement Case

EL SEGUNDO, CA – October 11, 2005 – International Rectifier Corporation (NYSE:IRF) today announced that in the matter of International Rectifier Corporation (IR) versus IXYS Corporation (IXYS) a federal court jury in Los Angeles, California, found that IXYS’ elongated octagonal MOSFETs and IGBTs infringed IR’s 4,959,699 patent. On October 6, the jury awarded IR damages in the amount of $6.241 million. Further proceedings are required in the trial court before final judgment can be entered. IR anticipates that IXYS will appeal the judgment.

International Rectifier (NYSE:IRF) is a world leader in power management technology.  IR’s analog and mixed signal ICs, advanced circuit devices, integrated power systems and components enable high performance computing and reduce energy waste in motors, the world’s single largest consumer of electricity.  Leading manufacturers of computers, energy efficient appliances, lighting, automobiles, satellites, aircraft, and defense systems rely on IR’s power management benchmarks to power their next generation products. For more information, go to www.irf.com.

Company Contact

Investor Relations: Steve Harrison, 310.252.7731

Media Relations: Graham Robertson, 310.726.8512