This part is a kind of semiconductor called KBPC3508.

Function of this product has SINGLE-PHASE SILICON BRIDGE.

Manufacturers : GOOD-ARK Electronics

Image and pinout :

Some of the text within the PDF file :

KBPC10,15,25,35 SERIES SINGLE-PHASE SILICON BRIDGE Reverse Voltage - 50 to 1000 Volts Forward Current - 10.0/15.0/25.0/35.0 Amperes Features Surge overload 200-400 amperes peak Low forward voltage drop Mounting position: Any Electrically isolated base-1800 volts Solderable 0.25” FASTON terminals Materials used carries U/L recognition DIMENSIONS DIM A B C D E F H inches Min. 0.432 1.12 0.612 0.672 0.512 Max. 0.442 1.13 0.692 0.752 0.590 1.0 Min. 10.97 28.4 15.5 17.1 13 mm Max. 11.23 28.7 17.6 19.1 15 25.4 Note DIM A B C D E F G H 0.672 inches Min. 0.432 1.12 0.410 1.2 0.672 DIMENSIONS mm Max. 0.442 1.13 0.490 0.752 Min. 10.97 28.4 10.4 30.5 17.1 Max. 11.23 28.7 12.4 19.1 Note 0.04(1.0) DIA Typ. 0.752 17.1 19.1 HOLE FOR NO.8 SCREW 0.193(4.9) DIA HOLE FOR NO. 8 SCREW 0.193(4.9) DIA Ma [ ... ]

KBPC3508 PDF Datasheet Download