This part is a kind of semiconductor called MUR460.

Function of this product has 4 AMP ULTRA FAST RECTIFIER.

Manufacturers : Digitron Semiconductors

Image and pinout :

Some of the text within the PDF file :

MUR405-MUR460 High-reliability discrete products and engineering services since 1977 4 AMP ULTRA FAST RECTIFIER FEATURES  Available as “HR” (high reliability) screened per MIL-PRF-19500, JANTX level. Add “HR” suffix to base part number.  Available as non-RoHS (Sn/Pb plating), standard, and as RoHS by adding “-PBF” suffix. MAXIMUM RATINGS Rating Peak repetitive reverse voltage Working peak reverse voltage DC blocking voltage Average rectified forward current (square wave) Mounting method per note 2 Non-repetitive peak surge current (surge applied at rated load conditions halfwave, single phase, 60Hz) Operating and storage junction temperature range Maximum thermal resistance Junction to ambient Symbol VRRM VRWM VR IF(AV) 405 50 MUR 410 415 420 100 150 200 4.0 @ [ ... ]

MUR460 PDF Datasheet Download