BUY B1163 https://www.utsource.net/itm/p/1879652.html

The B1163 is an NPN silicon power transistor in a TO-3PL package. It is designed for use in power switching circuits, such as high-frequency switching, audio amplifiers, and DC-DC converters. Features: * Collector-emitter voltage: 600V * Collector-base voltage: 600V * Emitter-base voltage: 5V * Collector current: 10A * Power dissipation: 80W Applications: * High-frequency switching * Audio amplifiers * DC-DC converters (For reference only)