Telefunken
BFC237251223 is a NPN silicon transistor produced by Vishay Telefunken. It has a low collector-emitter saturation voltage of 350 mV and is designed for high-speed switching applications such as DC-DC converters, motor control systems, AC invertors and UPS solutions. It is rated for a maximum collector current of 350 mA and a maximum collector-emitter voltage of 500 V. It is available in a TO-220AB package.