This part is a kind of semiconductor called KBU1510.

Function of this product has Glass Passivated Bridge Rectifiers.

Manufacturers : Yangzhou yangjie electronic

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Some of the text within the PDF file :

KBU15005 THRU KBU1510 Single Phase 15 AMPS. Glass Passivated Bridge Rectifiers Voltage Range 50 to 1000 Volts Current 15 Amperes KBU Features • UL Recognized File # E-230084 • Ideal for printed circuit board • Reliable low cost construction technique • results in inexpensive product High temperature soldering guaranteed: 260℃ / 10 seconds / 0.375” ( 9.5mm ) lead length at 5 lbs., ( 2.3 kg ) tension .700(17.8) .600(16.8) .15×.23L(3.8×5.7L) HOLE THRU .300(7.5) .780(19.8) .740(18.8) - AC + .52(1.3) .48(1.2) .866(22.0) MIN Mechanical Data • Case: Molded plastic • Lead: solder plated • Polarity: As marked .280(7.1) .268(6.8) .935(23.7) .895(22.7) DIA .220(5.6) .180(4.6) SPACING .140(5.3) Dimensions in inches and (millimeters) MAXIMUM RATINGS AND ELECTRICAL CHAR [ ... ]

KBU1510 PDF Datasheet Download