BUY SK8051S https://www.utsource.net/itm/p/1369101.html

Description: The SK8051S is a NPN silicon power transistor manufactured by Sanken Electric Co., Ltd. It is designed for use in power amplifier applications. Features: High breakdown voltage of 800V Low collector-emitter saturation voltage of 0.3V Low collector-emitter saturation voltage of 0.3V High current gain of 500 Low noise High frequency operation Low thermal resistance Applications: Power amplifier circuits Audio amplifiers Voltage regulators Motor control circuits Switching circuits (For reference only)