This part is a kind of semiconductor called 80N02.
Function of this product has NTD80N02.
Manufacturers : ON Semiconductor
Image and pinout :

Some of the text within the PDF file :
NTD80N02 Power MOSFET 24 V, 80 A, N−Channel DPAK Designed for low voltage, high speed switching applications in power supplies, converters and power motor controls and bridge circuits. Features http://onsemi.com V(BR)DSS 24 V RDS(on) TYP 5.0 mW ID MAX 80 A • Pb−Free Packages are Available Typical Applications • • • • Power Supplies Converters Power Motor Controls Bridge Circuits G Unit Vdc Vdc Adc 4 Watts °C mJ 1 2 3 N−Channel D MAXIMUM RATINGS (TJ = 25°C unless otherwise noted) Rating Drain−to−Source Voltage Gate−to−Source Voltage − Continuous Drain Current − Continuous @ TC = 25°C Drain Current − Single Pulse (tp = 10 ms) Total Power Dissipation @ TC = 25°C Operating and Storage Temperature Range Single Pulse Drain−to−Sourc [ ... ]
80N02 PDF Datasheet Download
