This part is a kind of semiconductor called KBP307G.

Function of this product has (KBP301G - KBP307G) Single Phase 3.0 AMPS. Glass Passivated Bridge Rectifiers.

Manufacturers : ETC

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Some of the text within the PDF file :

KBP301G THRU KBP307G Single Phase 3.0 AMPS. Glass Passivated Bridge Rectifiers Voltage Range 50 to 1000 Volts Current 3.0 Amperes Features a a a a a UL Recognized File # E-96005 Ideal for printed circuit board Reliable low cost construction technique results in inexpensive product High temperature soldering guaranteed: 250°C / 10 seconds at 5 lbs. ( 2.3 Kg ) tension Small size, simple installation Leads solderable per MIL-STD-202, Method 208 KBP Dimensions in inches and (millimeters) Maximum Ratings and Electrical Characteristics Rating at 25°C ambient temperature unless otherwise specified. Single phase, half wave, 60 Hz, resistive or inductive load. For capacitive load, derate current by 20% KBP KBP KBP KBP Type Number 301G 302G 303G Maximum Recurrent Peak Reverse Voltage Maximum R [ ... ]

KBP307G PDF Datasheet Download