International Rectifier was an American power management technology company manufacturing analog and mixed-signal ICs, advanced circuit devices, integrated power systems, and high-performance integrated components for computing.

[1] IR's products, as a part of Infineon Technologies' overall semiconductor portfolio, continue to be used in many applications including lighting, automobile, satellite, aircraft, and defense systems; as well as key components in power supply systems in electronics-based products that include especially microcomputers, servers, networking and telecommunications equipment.

To avoid bankruptcy, International Rectifier gave Pfizer its animal health and feed additive businesses.

[citation needed] In 2003, they developed iMOTION Integrated Design Platform for motor control applications.

In 2012, they followed by launching micro-integrated power modules for motor control applications and COOLiRIGBTs for automotive.