This part is a kind of semiconductor called 7N80Z.

Function of this product has 7A 800V N-CHANNEL POWER MOSFET.

Manufacturers : UNISONIC TECHNOLOGIES

Image and pinout :

Some of the text within the PDF file :

UNISONIC TECHNOLOGIES CO., LTD 7N80Z 7A, 800V N-CHANNEL POWER MOSFET  DESCRIPTION Power MOSFET The U TC 7N80Z is an N-ch annel mod e p ower MOSF ET using UTC’s advanced technology to provide customers with planar stripe and DMOS te chnology. T his techno logy s pecializes in allowing a minimum on-state resistance and superior switching performance. It also can withstand hig h e nergy pu lse i n the avala nche and commutation mode. The U TC 7N80Z is univ ersally a pplied in h igh efficie ncy s witch mode power supply.  FEATURES * RDS(on)=1.8Ω@VGS =10V * High switching speed * 100% avalanche tested  SYMBOL  ORDERING INFORMATION Package TO-220F1 Pin Assignment 1 2 3 G D S Packing Tube Ordering Number Lead Free Halogen Free 7N80ZL-TF1-T 7N80ZG-TF1-T Note: Pin Assignme [ ... ]

7N80Z PDF Datasheet Download