This part is a kind of semiconductor called PBL405.

Function of this product has SILICON BRIDGE RECTIFIERS.

Manufacturers : Compact Technology

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Some of the text within the PDF file :

SILICON BRIDGE RECTIFIERS PBL401 thru PBL407 REVERSE VOLTAGE - 50 to 1000 Volts FORWARD CURRENT - 4.0 Amperes FEATURES Rating to 1000V PRV Ideal for printed circuit board Reliable low cost construction utilizing molded plastic technique The plastic material has UL flammability classification 94V-0 UL Recognition File # E228882 MECHANICAL DATA Polarity : As marked on Body Weight : 0.08 ounces, 2.3 grams Mounting position : Any PBL .580(14.7) .540(13.7) + AC .640(16.3) .600(15.2) - .052(1.3) .048(1.2) DIA. .083 (2.1) .750 (19.0) MIN. .768(19.5) .728(18.5) .220(5.6) .180(4.6) SPACING .256(6.5) .236(6.0) Dimensions in inches and (millimeters) MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25̺ ambient temperature unless otherwise specified. Single phase, half wave, 60H [ ... ]

PBL405 PDF Datasheet Download