Transistor NPN Silicon 500V IC-1A TO-220 Case High Voltage Audio AMP

The NTE198 is a high voltage silicon NPN power transistor in a TO220 type package designed for use as a line operated audio output amplifier, switchmode power supply driver, and other switchmode applications.

Full spec sheet:

https://www.nteinc.com/specs/100to199/pdf/nte198.pdf