This part is a kind of semiconductor called MUR460.

Function of this product has 40A SUPER-FAST RECTIFIER.

Manufacturers : Diodes Incorporated

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Some of the text within the PDF file :

MUR460 40A SUPER-FAST RECTIFIER Features NEW PRODUCT · · · · · · Glass Passivated Die Construction Super-Fast Recovery Time For High Efficiency Low Forward Voltage Drop and High Current Capability Surge Overload Rating to 70A Peak Ideally Suited for Automated Assembly Plastic Material: UL Flammability Classification Rating 94V-0 Case: Molded Plastic Terminals: Solder Plated Terminal Solderable per MIL-STD-202, Method 208 Marking: R460 Polarity: Cathode Band Weight: 1.12 grams (approx.) Mounting Position: Any A B A D C Mechanical Data · · · · · · DO-201AD Dim A B C D Min 25.40 7.20 1.20 4.80 Max ¾ 9.50 1.30 5.30 All Dimensions in mm @ TA = 25°C unless otherwise specified Maximum Ratings and Electrical Characteristics Single phase, half wave, 60Hz, resistive or induc [ ... ]

MUR460 PDF Datasheet Download