This part is a kind of semiconductor called SB3045ST.

Function of this product has SCHOTTKY BARRIER RECTIFIERS.

Manufacturers : Pan Jit

Image and pinout :

Some of the text within the PDF file :

SB3020ST SERIES SCHOTTKY BARRIER RECTIFIERS 20 to 60 Volts CURRENT VOLTAGE FEATURES • Plastic package has Underwriters Laboratory Flammability Classification 94V-O. Flame Retardant Epoxy Molding Compound. • Exceeds environmental standards of 0.516(13.20) 0.504(12.80) 30 Amperes 0.615(15.60)MAX. 0.520(13.20) 0.504(12.80) 0.402(10.20) 0.385(9.80) 0.185(4.70) 0.169(4.30) MIL-S-19500/228 • Low power loss, high efficiency. • Low forward voltage, high current capability • High surge capacity. • For use in low voltage,high frequency inverters free wheeling , and polarlity protection applications. • In compliance with EU RoHS 2002/95/EC directives 0.118(3.0) MIN. 0.599(15.20) 0.582(14.80) 0.577(14.65) 0.565(14.35) 0.776(19.70) 0.759(19.30) 0.732(18.58) 0.715(18.18) MECHANICAL [ ... ]

SB3045ST PDF Datasheet Download