Fairchild Semiconductor
Fairchild Semiconductor, now part of onsemi, was a pioneering semiconductor company whose legacy spans over six decades of innovation in power management, discrete transistors, and analog ICs. Fairchild's product families — including SuperFET and SupreMOS power MOSFETs, FSBB and FAN-series motor drivers, and the iconic μA741 op-amp — remain in active production under the onsemi brand and continue to serve industrial, automotive, and consumer power electronics designs worldwide.
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About Fairchild Semiconductor
Fairchild Semiconductor was founded in 1957 in San Jose, California, by the "Traitorous Eight" — a group of engineers including Robert Noyce and Gordon Moore who would go on to found Intel. Fairchild is widely credited with inventing the commercial integrated circuit and birthing Silicon Valley. After decades of independent operation, Fairchild was acquired by ON Semiconductor (now onsemi) in 2016.
While Fairchild operates under the onsemi umbrella, many of its product families retain strong brand recognition and active production status. The SuperFET III MOSFET family delivers best-in-class RDS(on) × Qg performance for server SMPS and telecom rectifiers. FAN-prefix power management ICs (FAN7530, FAN7688, FAN6754) are widely used in PFC controllers, LLC resonant converters, and LED lighting drivers. Fairchild's optocoupler portfolio (FOD series) provides critical isolation in industrial controls.
On Octatronics, search Fairchild/onsemi legacy products by FAN, FDP, FQPF, FOD, and KA-prefix part numbers. Submit RFQs for both current-production and last-time-buy Fairchild components.
Fairchild Legacy Products
- Power MOSFETs — SuperFET, SupreMOS, and UniFET families
- Power management — FAN-series PFC, PWM, and LLC controllers
- Optocouplers — FOD phototransistor and phototriac output
- Discretes — small-signal transistors, diodes, and regulators
Fairchild Semiconductor Product Lines
Explore Fairchild Semiconductor's extensive product portfolio by major product area.
Integrated Circuits (ICs)
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Products
