This part is a kind of semiconductor called KBPC5010.

Function of this product has 50A HIGH CURRENT SINGLE-PHASE BRIDGE RECTIFIER.

Manufacturers : Won-Top Electronics

Image and pinout :

Some of the text within the PDF file :

WTE POWER SEMICONDUCTORS KBPC50 SERIES Pb 50A HIGH CURRENT SINGLE-PHASE BRIDGE RECTIFIER Features ! Diffused Junction A ! Low Reverse Leakage Current ! Low Power Loss, High Efficiency ! Electrically Isolated Metal Case for C ~ Maximum Heat Dissipation ! Case to Terminal Isolation Voltage 2500V ! Recognized File # E157705 D -























































+ ~ G C A C G ~+ C - ~D HH Mechanical Data E ! Case: KBPC (Metal Case with Faston Lugs) or KBPC-W (Metal Case with Wire Leads) ! Terminals: Plated Faston Lugs or Wire Leads, Add “W” Suffix to Indicate Wire Leads ! Polarity: As Marked on Case ! Mounting: Through Hole with #10 Screw ! Mounting Torque: 23 cm-kg (20 in-lbs) Max. ! Weight: 30 grams (KBPC); 28 grams (KBPC-W) ! Marking: Type Number ! [ ... ]

KBPC5010 PDF Datasheet Download