BUY 2SA680 https://www.utsource.net/itm/p/377331.html
SILICON PNP EPITAXIAL MESA TRANSISTOR TENTATIVE
2SA680 is a NPN silicon power transistor manufactured by Sanken. It is a TO-3 package transistor. Description: 2SA680 is a NPN silicon power transistor designed for use in audio, general purpose switching and amplifier applications. Features: High current capability Low collector-emitter saturation voltage High DC current gain High power dissipation High frequency operation Applications: Audio amplifiers General purpose switching Power amplifiers (For reference only)