BUY TIP50 https://www.utsource.net/itm/p/781086.html
NPN Silicon Transistor; Package: TO-220; No of Pins: 3; Container: Bulk
Description: NPN Darlington Transistor Features: High DC Current Gain High Collector-Emitter Voltage Low Collector-Emitter Saturation Voltage High Switching Speed Low Noise High Reliability Applications: Audio Amplifiers Motor Controls Switching Regulators Lamp Drivers Relay Drivers Solenoid Drivers (For reference only)