This part is a kind of semiconductor called IRF822.
Function of this product has N-Channel MOSFET Transistor.
Manufacturers : Inchange Semiconductor
Image and pinout :

Some of the text within the PDF file :
INCHANGE Semiconductor isc N-Channel MOSFET Transistor isc Product Specification IRF822 FEATURES ·Lower Input Capacitance ·Improved Gate Charge ·Extended Safe Operating Area ·Rugged Gate Oxide Technology DESCRIPTION ·Designed for use in switch mode power supplies and general purpose applications. ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER VALUE UNIT VDSS VGS Drain-Source Voltage Gate-Source Voltage-Continuous 500 ±20 V V ID Drain Current-Continuous 2.0 A IDM Drain Current-Single Pluse 7A PD Total Dissipation @TC=25℃ 50 W TJ Max. Operating Junction Temperature -55~150 ℃ Tstg Storage Temperature -55~150 ℃ THERMAL CHARACTERISTICS SYMBOL PARAMETER Rth j-c Rth j-a Thermal Resistance, Junction to Case Thermal Resistance, Junction to Ambient MAX 2. [ ... ]
IRF822 PDF Datasheet Download
