View stp7na40 datasheet:

STP7NA40 STP7NA40FI N - CHANNEL ENHANCEMENT MODE FAST POWER MOS TRANSISTOR TYPE VDSS RDS(on) ID STP7NA40 400 V < 1 ? 6.5 A STP7NA40FI 400 V < 1 ? 4.1 A TYPICAL R = 0.82 ? DS(on) ± 30V GATE TO SOURCE VOLTAGE RATING 100% AVALANCHE TESTED REPETITIVE AVALANCHE DATA AT 100oC 3 3 LOW INTRINSIC CAPACITANCES 2 2 1 1 GATE GHARGE MINIMIZED REDUCED THRESHOLD VOLTAGE SPREAD TO-220 ISOWATT220 DESCRIPTION This series of POWER MOSFETS represents the most advanced high voltage technology. The optimized cell layout coupled with a new proprietary edge termination concur to give the device low R and gate charge, unequalled DS(on) INTERNAL SCHEMATIC DIAGRAM ruggedness and superior switching performance. APPLICATIONS HIGH CURRENT, HIGH SPEED SWITCHING SWITCH MODE POWE