This part is a kind of semiconductor called KBL608.
Function of this product has SILICON BRIDGE RECTIFIERS.
Manufacturers : MDD
Image and pinout :

Some of the text within the PDF file :
KBL6005 THRU KBL610 KBL 0.768(19.5) 0.728(18.5) 0.580(14.7) 0.540(13.7) 0.640(16.3) 0.600(15.2) + AC - SILICON BRIDGE RECTIFIERS Reverse Voltage - 50 to 1000 Volts Forward Current - 6.0 Amperes FEATURES The plastic package carries Underwriters Laboratory Flammability Classification 94V-0 Ideal for printed circuit boards Low reverse leakage High forward surge current capability High temperature soldering guaranteed: 260 C/10 seconds,0.375”(9.5mm) lead length, 5 lbs. (2.3kg) tension 0.052(1.3) 0.048(1.2) 0.750 (19.0) MIN. 0.083 (2.1) 0.220(5.6) 0.180(4.6) 0.256(6.5) 0.236(6.0) Dimensions in inches and (millimeters) MECHANICAL DATA Case: Molded plastic body Terminals: Plated leads solderable per MIL-STD-750, Method 2026 Polarity: Polarity symbols marked on case Mounting Position: [ ... ]
KBL608 PDF Datasheet Download
