View stp9nk50z datasheet:

STP9NK50Z - STP9NK50ZFP STB9NK50Z N-CHANNEL 500V - 0.72? - 7.2A TO-220/TO-220FP/D2PAK Zener-Protected SuperMESH™ Power MOSFET TYPE VDSS RDS(on) ID Pw STP9NK50Z 500 V < 0.85 ? 7.2 A 110 W STP9NK50ZFP 500 V < 0.85 ? 7.2 A 30 W STB9NK50Z 500 V < 0.85 ? 7.2 A 110 W TYPICAL RDS(on) = 0.72 ? 3 2 EXTREMELY HIGH dv/dt CAPABILITY 1 100% AVALANCHE TESTED TO-220 TO-220FP GATE CHARGE MINIMIZED VERY LOW INTRINSIC CAPACITANCES VERY GOOD MANUFACTURING 3 1 REPEATIBILITY D2PAK DESCRIPTION The SuperMESH™ series is obtained through an extreme optimization of ST’s well established strip- based PowerMESH™ layout. In addition to pushing INTERNAL SCHEMATIC DIAGRAM on-resistance significantly down, special care is tak- en to ensure a very good dv/dt capability for the most deman