BUY B1391 https://www.utsource.net/itm/p/1831381.html

Description: NPN Transistor Features: - NPN Silicon Transistor - TO-220F Package - High Voltage, High Speed Switching Applications - High Current Gain Bandwidth Product - Low Saturation Voltage - High Switching Speed Applications: - Audio Amplifiers - Motor Control - Switching Regulators - DC-DC Converters - High Voltage, High Speed Switching Applications (For reference only)