This part is a kind of semiconductor called BY225.

Function of this product has Silicon Bridge Rectifiers.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

Ready-for-use full-wave bridge retifiers in a plastic encapsulation. The bridges are intended for use in equipment supplied from a.c. with r.m.s. voltages up to 80 V and are capable of delivering output currents up to 4.8A. They are also suitable for use in hi-fi audio equipment and low-voltage industrial power supplies. They may be used in free air or clipped to a heatsink.

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BY225 PDF Datasheet Download