This part is a kind of semiconductor called 3N80.
Function of this product has 800 Volts N-CHANNEL POWER MOSFET.
Manufacturers : Unisonic Technologies
Image and pinout :

Some of the text within the PDF file :
UNISONIC TECHNOLOGIES CO., LTD 3N80 Preliminary Power MOSFET 2.5 Amps, 800 Volts N-CHANNEL POWER MOSFET DESCRIPTION The UTC 3N80 uses advanced trench technology to provide excellent RDS(ON), low gate charge and operation with low gate voltages. This device is suitable for use as a load switch or in PWM applications. FEATURES * RDS(ON)=3.8Ω @VGS=10 V * Ultra low gate charge ( typical 19 nC ) * Low reverse transfer capacitance ( CRSS = typical 11 pF ) * Fast switching capability * Avalanche energy specified * Improved dv/dt capability, high ruggedness Lead-free: 3N80L Halogen-free: 3N80G SYMBOL 2.Drain 3.Gate 1.Source ORDERING INFORMATION Normal 3N80-TA3-T 3N80-TF3-T Ordering Number Lead Free 3N80L-TA3-T 3N80L-TF3-T Halogen Free 3N80G-TA3-T 3N80 [ ... ]
3N80 PDF Datasheet Download
