This part is a kind of semiconductor called STPS2045CT.

Function of this product has POWER SCHOTTKY RECTIFIER.

Manufacturers : ST Microelectronics

Image and pinout :

Some of the text within the PDF file :

® STPS2045CT/CF/CG/CFP POWER SCHOTTKY RECTIFIER MAIN PRODUCT CHARACTERISTICS IF(AV) VRRM Tj (max) VF (max) 2 x 10 A 45 V 175 °C 0.57 V A1 K A2 FEATURES AND BENEFITS s VERY SMALL CONDUCTION LOSSES s NEGLIGIBLE SWITCHING LOSSES s EXTREMELY FAST SWITCHING s INSULATED PACKAGE: ISOWATT220AB, TO-220FPAB Insulating voltage = 2000V DC Capacitance = 12pF DESCRIPTION Dual center tap Schottky rectifier suited for SwitchMode Power Supply and high frequency DC to DC converters. Packaged either in TO-220AB, ISOWATT220AB, TO-220FPAB or D2PAK, this device is especially intended for use in low voltage, high frequency inverters, free wheeling and polarity protection applications. A2 K A1 TO-220AB STPS2045CT K A2 K A1 ISOWATT220AB STPS2045CF A2 A1 D2PAK STPS2045CG A2 K A1 TO-220FPAB STPS2045CFP [ ... ]

STPS2045CT PDF Datasheet Download