This part is a kind of semiconductor called W7NA80.
Function of this product has STW7NA80.
Manufacturers : STMicroelectronics
Image and pinout :
Some of the text within the PDF file :
® STW7NA80 STH7NA80FI N - CHANNEL ENHANCEMENT MODE FAST POWER MOS TRANSISTOR TYPE STW 7NA80 STH7NA80F I V DSS 800 V 800 V R DS(on) < 1.9 Ω < 1.9 Ω ID 6.5 A 4 A s s s s s s s TYPICAL RDS(on) = 1.68 Ω ± 30V GATE TO SOURCE VOLTAGE RATING 100% AVALANCHE TESTED REPETITIVE AVALANCHE DATA AT 100oC LOW INTRINSIC CAPACITANCES GATE CHARGE MINIMIZED REDUCED THRESHOLD VOLTAGE SPREAD 1 2 3 2 1 3 TO-247 APPLICATIONS s HIGH CURRENT, HIGH SPEED SWITCHING s SWITCH MODE POWER SUPPLIES (SMPS) s DC-AC CONVERTERS FOR WELDING EQUIPMENT AND UNINTERRUPTIBLE POWER SUPPLIES AND MOTOR DRIVE ISOWATT218 INTERNAL SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Parameter Valu e ST W7NA80 V DS V DGR V GS ID ID I DM ( • ) P tot V ISO Ts tg Tj Drain-source Voltage (VGS = 0) D [ ... ]