If you are a seasoned electronic repairer, i’m very sure that you have came across before part number starting with IRFXXXX FET’s. The part numbers like IRF630, IRF640, IRF9610 and etc were manufactured by International Rectifier (IR). Here are just some of the background of IR:
“International Rectifier was founded in Los Angeles in August 1947 to manufacture Selenium rectifiers. IR was one of the first companies to commercialize Germanium rectifiers in 1954, and the first to introduce commercial zener diodes and solar cells in 1958. International Rectifier (IR) (Symbol:IRF–NYSE) is a pioneer and world leader in advanced power management technology, from digital, analog and mixed-signal ICs to advanced circuit devices, power systems and components. The world’s leading manufacturers of computers, appliances, automobiles, consumer electronics and defense systems rely on IR technology to drive the performance and efficiency of their products. Today, power management technology plays a more important role than ever in saving the world’s dwindling energy reserves while tackling tough technology roadblocks. ” For more information you may Click Here to go to the website. By the way you can search the part number and get a free download of the specification in pdf file.