This part is a kind of semiconductor called CEP3205.

Function of this product has N-Channel Enhancement Mode Field Effect Transistor.

Manufacturers : CET

Image and pinout :

Some of the text within the PDF file :

N-Channel Enhancement Mode Field Effect Transistor FEATURES 55V, 108.5A, RDS(ON) = 8.5mΩ @VGS = 10V. Super high dense cell design for extremely low RDS(ON). High power and current handing capability. Lead free product is acquired. TO-220 & TO-263 package. CEP3205/CEB3205 PRELIMINARY D D G G D S S CEB SERIES TO-263(DD-PAK) G CEP SERIES TO-220 S ABSOLUTE MAXIMUM RATINGS Parameter Drain-Source Voltage Gate-Source Voltage Drain Current-Continuous Drain Current-Pulsed a Tc = 25 C unless otherwise noted Symbol Limit VDS VGS ID IDM PD TJ,Tstg 55 Units V V A A W W/ C C ±20 108.5 434 200 1.3 -55 to 175 Maximum Power Dissipation @ TC = 25 C - Derate above 25 C Operating and Store Temperature Range Thermal Characteristics Parameter Thermal Resistance, Junction-to [ ... ]

CEP3205 PDF Datasheet Download