This part is a kind of semiconductor called IRF540.

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 IRF540 ·FEATURES ·Low RDS(on) ·VGS Rated at ±20V ·Silicon Gate for Fast Switching Speed ·Rugged ·Low Drive Requirements ·DESCRITION ·Designed especially for high voltage,high speed applications, such as off-line switching power supplies , UPS,AC and DC motor controls,relay and solenoid drivers. ·ABSOLUTE MAXIMUM RATINGS(Ta=25℃) SYMBOL PARAMETER VALUE UNIT VDSS VGS Drain-Source Voltage Gate-Source Voltage-Continuous 100 ±20 V V ID Drain Current-Continuous 28 A IDM Drain Current-Single Plused 110 A PD Total Dissipation @TC=25℃ 150 W Tj Max. Operating Junction Temperature -55~175 ℃ Tstg Storage Temperature -55~175 ℃ ·THERMAL CHARACTERISTICS SYMBOL PARAMETER MAX UNIT R [ ... ]

IRF540 PDF Datasheet Download