The NTE94 is a silicon NPN transistor in a TO3 type case designed for medium to high voltage inverters, converters, regulators, and switching circuits.
Full spec sheet:
https://www.nteinc.com/specs/10to99/pdf/nte94.pdf
NTE94 NPN Transistor High Voltage Switch, 5A 300V
SKU: NTE94
$4.73Price