This part is a kind of semiconductor called KBPC1004.

Function of this product has 10A HIGH CURRENT BRIDGE RECTIFIER.

Manufacturers : Won-Top Electronics

Image and pinout :

Some of the text within the PDF file :

W TE POWER SEMICONDUCTORS KBPC1000/W – KBPC1010/W 10A HIGH CURRENT BRIDGE RECTIFIER Features ! Diffused Junction ! Low Reverse Leakage Current ! Low Power Loss, High Efficiency ! Electrically Isolated Metal Case for Maximum Heat Dissipation ! Case to Terminal Isolation Voltage 2500V ! UL Recognized File # E157705 A C G ~ D +C -~ A C ~ C - G + ~D H Mechanical Data ! Case: Metal Case with Electrically Isolated Epoxy ! Terminals: Plated Leads Solderable per KBPC MIL-STD-202, Method 208 ! Polarity: Symbols Marked on Case ! Mounting: Through Hole for #10 Screw ! Weight: KBPC 31.6 grams (approx.) KBPC-W 28.5 grams (approx.) ! Marking: Type Number Dim A B C D "W” Suffix Designates Wire Leads E No Suffix Designates Faston Terminals G H E B H E B KBPC-W KBPC KBPC-W Min [ ... ]

KBPC1004 PDF Datasheet Download