View stp3nk90z datasheet:

STP3NK90Z - STP3NK90ZFP STD3NK90Z - STD3NK90Z-1 N-CHANNEL 900V - 4.1? - 3A TO-220/TO-220FP/DPAK/IPAK Zener-Protected SuperMESH™Power MOSFET TYPE VDSS RDS(on) ID Pw STP3NK90Z 900 V < 4.8 ? 3 A 90 W STP3NK90ZFP 900 V < 4.8 ? 3 A 25 W STD3NK90Z 900 V < 4.8 ? 3 A 90 W STD3NK90Z-1 900 V < 4.8 ? 3 A 90 W 3 TYPICAL RDS(on) = 4.1 ? 2 1 EXTREMELY HIGH dv/dt CAPABILITY TO-220 TO-220FP 100% AVALANCHE TESTED GATE CHARGE MINIMIZED VERY LOW INTRINSIC CAPACITANCES 3 VERY GOOD MANUFACTURING 3 2 1 REPEATIBILITY 1 IPAK DPAK DESCRIPTION The SuperMESH™ series is obtained through an extreme optimization of ST’s well established strip- INTERNAL SCHEMATIC DIAGRAM based PowerMESH™ layout. In addition to pushing on-resistance significantly down, special care is tak- en to ensu