This part is a kind of semiconductor called RU75N08.
Function of this product has N-Channel Advanced Power MOSFET.
Manufacturers : Ruichips
Image and pinout :

Some of the text within the PDF file :
RU75N08 N-Channel Advanced Power MOSFET MOSFET Features • 75V/80A, RDS (ON) =8mΩ VGS=10V IDS=40A • 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 Pin Description TO-220 TO-220F TO-263 TO-247 Applications • Switching Application Systems N-Channel MOSFET Absolute Maximum Ratings Symbol Parameter Rating 75 ±25 175 -55 to 175 TC=25°C TC=25°C TC=25°C TC=100°C TC=25°C TC=100°C 80 ① Unit Common Ratings (TA=25°C Unless Otherwise Noted) VDSS VGSS TJ TSTG IS Drain-Source Voltage Gate-Source Voltage Maximum Junction Temperature Storage Temperature Range Diode Continuous Forward Current V °C °C A A A W °C/W J Mounted on Larg [ ... ]
RU75N08 PDF Datasheet Download
