This part is a kind of semiconductor called KBPC5010.

Function of this product has SILICON BRIDGE RECTIFIERS.

Manufacturers : EIC

Image and pinout :

Some of the text within the PDF file :

www.eicsemi.com TH97/2478 TH09/2479 IATF 0113686 SGS TH07/1033 KBPC5000 - KBPC5010 PRV : 50 - 1000 Volts Io : 50 Amperes FEATURES : * * * * * * * High case dielectric strength High surge current capability High reliability High efficiency Low reverse current Low forward voltage drop Pb / RoHS Free SILICON BRIDGE RECTIFIERS BR50M 0.728(18.50) 0.688(17.40) 0.570 (14.50) 0.530(13.40) 0.685(16.70) 0.618(15.70) 1.130(28.70) 1.120(28.40) 0.658(16.70) 0.618(15.70) 0.210(5.30) 0.200(5.10) 0.032(0.81) 0.028(0.71) 0.256(6.50) 0.248(6.30) φ 0.100(2.50) 0.090(2.30) 1.011 (25.7) 0.893 (22.7) MECHANICAL DATA : Case : Metal Case Epoxy : UL94V-0 rate flame retardant Terminals : plated .25" (6.35 mm). Faston Polarity : Polarity symbols marked on case Mounting position : Bolt down on heat-sink [ ... ]

KBPC5010 PDF Datasheet Download