This part is a kind of semiconductor called CMP3205A.
Function of this product has N-Channel Enhancement Mode Field Effect Transistor.
Manufacturers : Cmos
Image and pinout :

Some of the text within the PDF file :
CMP3205A / CMB3205A N-Channel Enhancement Mode Field Effect Transistor General Description Product Summery The 3205A is a N-channel Power MOSFET. It has specifically been designed to minimize input capacitance and gate charge. The BVDSS 55V RDSON 8.0m ID 110A device is therefore suitable in advanced Applications high-efficiency switching applications. Features Advanced Process Technology Ultra Low On-Resistance Dynamic dv/dt Rating 175°C Operating Temperature Fast Switching Fully Avalanche Rated Lead-Free Absolute Maximum Ratings LED POWER CONTROLLER DC-DC & DC-AC CONVERTERS HIGH CURRENT, HIGH SPEED SWITCHING SOLENOID AND RELAY DRIVERS MOTOR CONTROL, AUDIO AMPLIFIERS TO220 / TO263 Pin Configuration G DS TO-220 (CMP3205A) GD S TO-263 (CMB3205A) Symbol VDS VGS ID@TC=25 ID@TC=1 [ ... ]
CMP3205A PDF Datasheet Download
