International Rectifier to Announce Results for First Quarter Fiscal 2010 on November 5, 2009

International Rectifier Corporation (NYSE:IRF) will release its fiscal year 2010 first-quarter results on Thursday, November 5, at approximately 1:15 p.m. Pacific time, followed by a conference call at 2:15 p.m. Pacific time. CEO Oleg Khaykin and CFO Ilan Daskal will discuss the company’s September-quarter results and December-quarter outlook. All participants, both in the U.S. and international, may join the call by dialing 706-679-3195 by 2:10 p.m. Pacific time, or may listen over the Internet at http://investor.irf.com. To listen to the live call, please go to the web site at least 15 minutes early to register, download, and install any necessary audio software.

A taped replay of this call will be available from approximately 5:15 p.m. Pacific time on Thursday, November 5, through Thursday, November 12, 2009. To listen to the replay by phone, call 800-642-1687 or 706-645-9291 for international callers and enter reservation number 37154132. To listen to the replay over the Internet, please go to http://investor.irf.com. The live call and replay will also be available on www.streetevents.com.

About International Rectifier

International Rectifier Corporation (NYSE:IRF) is a world leader in power management technology. IR’s analog, digital, and mixed signal ICs, and other advanced power management products, enable high performance computing and save energy in a wide variety of business and consumer applications. Leading manufacturers of computers, energy efficient appliances, lighting, automobiles, satellites, aircraft, and defense systems rely on IR’s power management solutions to power their next generation products. For more information, go to www.irf.com.