Item 1.01 Entry into a Material Definitive Agreement

International Rectifier Corporation (the "Company") previously reported that each independent member of the Company's Board of Directors (the "Board") is entitled to receive an annual grant of 12,000 options to purchase shares of the Company's common stock, to be granted on the date on which the Company's Annual Meeting of Shareholders ("Annual Meeting") is held, with the exercise price per share of such options being the closing price per share of the Company's common stock on the New York Stock Exchange ("NYSE") on that date. On May 11, 2009, the Board changed the date on which such annual grants are to be made, commencing with the annual grant to be made for 2009, from the date of the Annual Meeting to the third business day following the date that the Company's Annual Report on Form 10-K falling due within such year is filed with the Securities and Exchange Commission. The exercise price per share of such options would be the closing price per share of the Company's common stock on the NYSE on that grant date. Additionally, any independent director first joining the Board during such year would be eligible for an annual grant pro-rated for the portion of the year to be served by the independent director.

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