This part is a kind of semiconductor called KBU1510.

Function of this product has SINGLE-PHASE SILICON BRIDGE RECTIFIER.

Manufacturers : HORNBY

Image and pinout :

Some of the text within the PDF file :

KBU15005 THRU KBU1510 SINGLE-PHASE SILICON BRIDGE RECTIFIER REVERSE VOLTAGE: FORWARD CURRENT: FEATURES · High surge current capability · Ideal for printed circuit board · Plastic material has Underwriters Laboratory Flammability Classification 94V-0 · Reliable low cost construction utilizing molded plastic technique KBU 50 to 1000 VOLTS 15.0 AMPERE MECHANICAL DATA Case: Molded plastic, KBU Epoxy: UL 94V-O rate flame retardant Terminals: Leads solderable per MIL-STD-202, method 208 guaranteed Mounting position: Any Weight: 0.3ounce, 8.0gram Dimensions in inchs and (millimeters) Maximum Ratings and Electrical Characteristics Ratings at 25℃ ambient temperature unless otherwise specified. Single phase, half wave, 60HZ, resistive or inductive load. For capacitive load, derate current b [ ... ]

KBU1510 PDF Datasheet Download