View stw7n datasheet:

STW7NA80 STH7NA80FI ? N - CHANNEL ENHANCEMENT MODE FAST POWER MOS TRANSISTOR TYPE VDSS RDS(on) ID STW7NA80 800 V < 1.9 ? 6.5 A STH7NA80FI 800 V < 1.9 ? 4 A TYPICAL R = 1.68 ? DS(on) ± 30V GATE TO SOURCE VOLTAGE RATING 100% AVALANCHE TESTED REPETITIVE AVALANCHE DATA AT 100oC 3 3 2 LOW INTRINSIC CAPACITANCES 1 2 1 GATE CHARGE MINIMIZED REDUCED THRESHOLD VOLTAGE SPREAD TO-247 ISOWATT218 APPLICATIONS HIGH CURRENT, HIGH SPEED SWITCHING SWITCH MODE POWER SUPPLIES (SMPS) DC-AC CONVERTERS FOR WELDING INTERNAL SCHEMATIC DIAGRAM EQUIPMENT AND UNINTERRUPTIBLE POWER SUPPLIES AND MOTOR DRIVE ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit STW7NA80 STH7NA80FI V Drain-source Voltage (V = 0) 800 V DS GS VDGR Drain- gate Voltage (RGS = 20 k?) 800 V VGS Gate-