BUY MJ4237 https://www.utsource.net/itm/p/255686.html
POWER TRANSISTOR NPN SILICON
Package Type: TO-3 Manufacturer: MOT Description: The MJ4237 is a NPN silicon power transistor designed for general-purpose switching and amplifier applications. Features: - NPN Silicon Power Transistor - High DC Current Gain - Low Saturation Voltage - High Switching Speed - Low Collector-Emitter Saturation Voltage - Low Collector-Base Capacitance Applications: - Audio Amplifiers - Motor Control - Switching Regulators - Power Supplies - General Purpose Switching and Amplifier Applications (For reference only)