N-Channel MOSFET, 3.9 A, 800 V, 3-Pin TO-220AB onsemi FQP4N80

QFET® N-Channel MOSFET, up to 5.9A, Fairchild Semiconductor. Fairchild Semiconductor ‘s new QFET® planar MOSFETs use advanced, proprietary technology to offer best-in-class operating performance for a wide range of applications, including power supplies, PFC (Power Factor Correction), DC-DC Converters, Plasma Display Panels (PDP), lighting ballasts, and motion control. They offer reduced on-state loss by lowering on-resistance (RDS(on)), and reduced switching loss by lowering gate charge (Qg) and output capacitance (Coss). By using advanced QFET® process technology, Fairchild can offer an improved figure of merit (FOM) over competing planar MOSFET devices.