This part is a kind of semiconductor called 6N80.

Function of this product has N-Channel MOSFET Transistor.

Manufacturers : Inchange Semiconductor

Image and pinout :

Some of the text within the PDF file :

INCHANGE Semiconductor isc N-Channel MOSFET Transistor isc Product Specification 6N80 ·FEATURES ·Drain Current ID= 6A@ TC=25℃ ·Drain Source Voltage : VDSS= 800V(Min) ·Static Drain-Source On-Resistance : RDS(on) = 2Ω(Max) ·Avalanche Energy Specified ·Fast Switching ·Simple Drive Requirements ·DESCRITION ·Switch mode power supply. ·ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER VALUE UNIT VDSS VGS ID IDM PD Tj Tstg Drain-Source Voltage 800 V Gate-Source Voltage-Continuous ±20 V Drain Current-Continuous 6A Drain Current-Single Plused 24 A Total Dissipation @TC=25℃ 150 W Max. Operating Junction Temperature 150 ℃ Storage Temperature -55~150 ℃ ·THERMAL CHARACTERISTICS SYMBOL PARAMETER MAX UNIT Rth j-c Rth j-a Thermal Resistance, Junction t [ ... ]

6N80 PDF Datasheet Download