This part is a kind of semiconductor called IRF3710.

Function of this product has N-Channel Power MOSFET.

Manufacturers : nELL

Image and pinout :

Some of the text within the PDF file :

SEMICONDUCTOR IRF3710 Series RRooHHSS DESCRIPTION Nell High Power Products N-Channel Power MOSFET (57A, 100Volts) The Nell IRF3710 are N-channel enhancement mode silicon gate power field effect transistors. They are designed, tested and guaranteed to withstand level of energy in breakdown avalanche made of operation. They are designed as an extremely efficient and reliable device for use in a wide variety of applications such as switching regulators, convertors, motor drivers and drivers for high power bipolar switching transistors requiring high speed and low gate drive power. These transistors can be operated directly from integrated circuits. D GDS TO-220AB (IRF3710A) D (Drain) FEATURES RDS(ON) = 0.023Ω @ VGS = 10V Ultra low gate charge(130nC max.) Low reverse transfer capaci [ ... ]

IRF3710 PDF Datasheet Download