This part is a kind of semiconductor called D3SBA60.

Function of this product has General Purpose Rectifiers.

Manufacturers : Shindengen Electric

Image and pinout :

Some of the text within the PDF file :

SHINDENGEN General Purpose Rectifiers D3SBA60 600V 4A OUTLINE DIMENSIONS Case : 3S FEATURES Thin Single In-Line Package High IFSM Applicable to Automatic Insertion APPLICATION Switching power supply Home Appliances, Office Equipment Telecommunication, Factory Automation SIL Bridges Unit : mm RATINGS œAbsolute Maximum Ratings (If not specified Tc=25Ž) Item Symbol Conditions Storage Temperature Tstg Operating Junction Temperature Tj Maximum Reverse Voltage VRM Average Rectified Forward Current IO 50Hz sine wave, R-load With heatsink Tc=108Ž Peak Surge Forward Current Current Squared Time 50Hz sine wave, R-load Without heatsink Ta=25Ž IFSM 50Hz sine wave, Non-repetitive 1cycle peak value, Tj=25Ž I2t 1ms…tƒ10ms@Tj=25Ž Dielectric Strength Vdis Terminals to case, AC 1 m [ ... ]

D3SBA60 PDF Datasheet Download