International Rectifier (IR) was a renowned American semiconductor manufacturer, founded in 1947 and headquartered in El Segundo, California. The company specialized in power management technology, producing a wide range of high-performance components such as MOSFETs, IGBTs, and integrated circuits. Known for innovation and reliability, IR's products were critical in applications including computing, automotive systems, industrial motor drives, and renewable energy. The company was acquired by Infineon Technologies in 2015, significantly expanding Infineon’s portfolio in power semiconductors. Throughout its history, IR was recognized for its expertise in energy-efficient solutions and its strong focus on research and development.