This part is a kind of semiconductor called P3NK80Z.
Function of this product has STP3NK80Z.
Manufacturers : STMicroelectronics
Image and pinout :

Some of the text within the PDF file :
STP3NK80Z - STF3NK80Z STD3NK80Z - STD3NK80Z-1 N-CHANNEL 800V - 3.8Ω - 2.5A TO-220/FP/DPAK/IPAK Zener-Protected SuperMESH™ Power MOSFET TYPE VDSS RDS(on) ID Pw STP3NK80Z STF3NK80Z STD3NK80Z STD3NK80Z-1 800 V 800 V 800 V 800 V < 4.5 Ω < 4.5 Ω < 4.5 Ω < 4.5 Ω 2.5 A 2.5 A 2.5 A 2.5 A 70 W 25 W 70 W 70 W s TYPICAL RDS(on) = 3.8 Ω s EXTREMELY HIGH dv/dt CAPABILITY s 100% AVALANCHE TESTED s GATE CHARGE MINIMIZED s VERY LOW INTRINSIC CAPACITANCES s VERY GOOD MANUFACTURING REPEATIBILITY 3 2 1 TO-220 3 1 DPAK 3 2 1 TO-220FP IPAK 3 2 1 DESCRIPTION The SuperMESH™ series is obtained through an extreme optimization of ST’s well established stripbased PowerMESH™ layout. In addition to pushing on-resistance significantly down, special care is taken t [ ... ]
P3NK80Z PDF Datasheet Download
