International Rectifier

High-Level Overview

International Rectifier Corporation (IR), founded in 1947, was a pioneering American semiconductor company specializing in power management technology, including analog and mixed-signal ICs, advanced circuit devices, and integrated power systems.[1][2][4] It served manufacturers in computing, consumer electronics, appliances, automotive, lighting, satellites, aircraft, and defense, solving critical problems in energy efficiency, power conversion, and thermal management through innovations like HEXFET power MOSFETs and DirectFET packaging.[1][2][4][5] With over $1 billion in revenue and around 5,400 employees pre-acquisition, IR operated globally with wafer fabrication in the US, Mexico, Wales, and Italy, but was acquired by Infineon Technologies in 2014 for $3 billion, fully integrating by 2015 to enhance portfolios in low-power solutions.[1][2][3][4]

Origin Story

IR was established in 1947 in El Segundo, California, by Eric Lidow as a leader in semiconductor rectifiers, starting with germanium rectifiers in 1954 and the first silicon-based rectifier in 1959.[1][2][3] Key early milestones included power and Darlington transistors with glass passivation (1974), the revolutionary HEXFET hexagonal power MOSFET (1979), and intelligent power ICs (1983), amid challenges like a $55 million patent loss to Pfizer in 1983 that forced divestiture of non-core businesses.[2][3] The company evolved through innovations like FlipFET (2000), DirectFET (2002), iMOTION for motor control (2003), GaN-based devices (2008), and PowIRstage (2011), building traction in high-performance applications before its 2014 acquisition by Infineon, marking the end of its independence.[1][2][3][4]

Core Differentiators

• Pioneering Power Innovations: First to commercialize silicon rectifiers (1959), HEXFET MOSFETs (1979) for superior efficiency, and packaging like DirectFET (2002) and FlipFET (2000) to overcome thermal limits in computing and communications.[1][2][3]
• Broad Product Portfolio: Specialized in power MOSFETs, IGBTs, ICs, relays, LEDs, SupIRBuck regulators (2007), SmartRectifier for AC/DC (2006), and GaN platforms (2008), enabling energy savings in appliances, autos, and defense.[1][2][4][5]
• Global Manufacturing Scale: Facilities in El Segundo/Tempe/Temecula CA, Leominster MA, Mesa AZ, San Jose CA, Tijuana Mexico, Newport Wales, and Italy, supporting high-volume, ISO-certified production.[2][3][4]
• Acquisition Synergies: Post-2015 Infineon integration amplified low-power expertise with broader resources, improving customer support and tech advancement over competitors like Cypress or Atmel.[1][4]

Role in the Broader Tech Landscape

IR rode the semiconductor power efficiency wave, critical for the electronics boom in computing, consumer devices (e.g., PlayStation 3 power components), EVs, and renewables, where market forces like energy regulations and miniaturization demanded better thermal/performance solutions.[1][2][5][6] Its timing aligned with 1970s-2010s shifts to MOSFETs and GaN, influencing ecosystems by powering high-stakes applications in autos, satellites, and defense, while the Infineon merger (2014-2015) strengthened global supply chains amid chip shortages and electrification trends.[1][3][4] IR's legacy shaped power management standards, enabling downstream innovations in efficient computing and motor controls.[2][5]

Quick Take & Future Outlook

As part of Infineon since 2015, IR's technologies fuel electrification and AI-driven power demands, with GaN/HEXFET lineages poised for EV chargers, data centers, and 5G/6G infrastructure.[1][2] Trends like wide-bandgap semiconductors and sustainability will amplify its influence, evolving from standalone pioneer to integrated powerhouse in a $600B+ market. This trajectory ties back to IR's foundational rectifier breakthroughs, now scaling global efficiency gains.