This part is a kind of semiconductor called RU75N08S.

Function of this product has N-Channel Advanced Power MOSFET.

Manufacturers : Ruichips

Image and pinout :

Some of the text within the PDF file :

RU75N08S N-Channel Advanced Power MOSFET Features • 75V/80A, RDS (ON) =8mΩ (typ.) @VGS=10V • Ultra Low On-Resistance • Exceptional dv/dt capability • Fast Switching and Fully Avalanche Rated • 100% avalanche tested • 175°C Operating Temperature • Lead Free and Green Available Applications • Switching Application Systems Pin Description TO-263 N-Channel MOSFET Absolute Maximum Ratings Symbol Parameter Common Ratings (TA=25°C Unless Otherwise Noted) VDSS Drain-Source Voltage VGSS Gate-Source Voltage TJ Maximum Junction Temperature TSTG Storage Temperature Range IS Diode Continuous Forward Current Mounted on Large Heat Sink IDP 300μs Pulse Drain Current Tested ID Continuous Drain Current(VGS=10V) PD Maximum Power Dissipation RJC Thermal Resistance-Jun [ ... ]

RU75N08S PDF Datasheet Download