This part is a kind of semiconductor called 3045WT.
Function of this product has MBR3045WT.
Manufacturers : International Rectifier
Image and pinout :

Some of the text within the PDF file :
MBR3035WT/MBR3045WT Vishay High Power Products Schottky Rectifier, 2 x 15 A Base common cathode 2 FEATURES • • • • • 150 °C TJ operation Center tap TO-247 package Very low forward voltage drop High frequency operation High purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance • Guard ring for enhanced ruggedness and long term reliability • Designed and qualified for industrial level TO-247AC 1 3 Anode Anode 2 1 2 Common cathode DESCRIPTION The MBR30..WT center tap Schottky rectifier has been optimized for very low forward voltage drop, with moderate leakage. The proprietary barrier technology allows for reliable operation up to 150 °C junction temperature. Typical applications are in switching power su [ ... ]
3045WT PDF Datasheet Download
