The STB85NS04Z is an N-channel MOSFET manufactured by STMicroelectronics, featuring a drain-source voltage rating of 33 volts and a continuous drain current of 80 amperes when properly heat-sunk. It is capable of handling up to 215 watts of power dissipation under controlled conditions. The device is designed for surface mount applications and comes in a D2PAK package, offering robust thermal performance and efficient heat dissipation. It features a gate-source voltage of ±18 volts, a gate threshold voltage of 4 volts at a gate current of 1mA, and a total gate charge of 2500 picofarads at 25 volts, highlighting its suitability for high-power electronic applications.