This part is a kind of semiconductor called U20C60C.

Function of this product has 20.0 Ampere Dual Common Cathode Ultra Fast Recovery Diodes.

Manufacturers : Thinki Semiconductor

Image and pinout :

Some of the text within the PDF file :

U20C20C thru U20C60C ® U20C20C thru U20C60C Pb Pb Free Plating Product 20.0 Ampere Dual Common Cathode Ultra Fast Recovery Diodes Features Fast switching for high efficiency Low forward voltage drop High current capability Low reverse leakage current High surge current capability Application Automotive Inverters/Solar Inverters Plating Power Supply,SMPS and UPS Car Audio Amplifiers and Sound Device Systems Mechanical Data Case: Heatsink TO-220AB Epoxy: UL 94V-0 rate flame retardant Terminals: Solderable per MIL-STD-202 method 208 Polarity: As marked on diode body Mounting position: Any Weight: 2.2 gram approximately TO-220AB .419(10.66) .387(9.85) .139(3.55) MIN Unit : inch (mm) .196(5.00) .163(4.16) .054(1.39) .045(1.15) .269(6.85) .226(5.75) .624(15.87) .548(13.93) .177(4.5)MA [ ... ]

U20C60C PDF Datasheet Download