This post explains for the Diode.
The Part Number is BY225.
The function of this semiconductor is Silicon Bridge Rectifier.
Manufacturers : NXP
Preview images :
Ready-for-use full-wave bridge rectifiers in a plastic encapsulation.
The bridges are intended for use in equipment supplied from a.c with r.m.s voltages up to 80V and are capable of delivering output currents up to 4,8A.
They are also suitable for use in hi-fi audio equipments and low-voltage industrial power supplies.
The may be used in free air or clipped to a heatsink. [ … ]