Transistors Mosfets, Mosfet power transistor, audio mosfet, mosfet switch

 N-Channel 1 kV 3.7 Ohm SuperMESH3 Power MosFet - TO-220

https://www.futureelectronics.com/p/semiconductors--discretes--transistors--mosfets/stp5nk100z-stmicroelectronics-7871643