BUY MJ15004G https://www.utsource.net/itm/p/12359950.html
Description: The MJ15004G is a NPN silicon power transistor in a TO-3 package.
Features:
High DC current gain
Low collector-emitter saturation voltage
High collector-emitter breakdown voltage
High power dissipation
Applications:
Audio amplifiers
High-frequency power amplifiers
Switching circuits
(For reference only)