This part is a kind of semiconductor called F12C20CT.

Function of this product has FAST RECOVERY RECTIFIERS.

Manufacturers : JU-Topvessel Electronic

Image and pinout :

Some of the text within the PDF file :

HS DATA SHEET FAST RECOVERY RECTIFIERS VOLTAGE 200 Volts FEATURES Low Forward Voltage. F12C20CT CURRENT 12.0 Amperes TO-220AB Unit:mm · ·Low Reverse Leakage Current. ·Fast Switching for High Efficiency. ·Low Forward Voltage , High Current Capability. MECHANICAL DATA ·Case: TO-220AB Molded Plastic ·Polarity: Symbols molded or marked on body ·Mounting position : Any In compliance with EU RoHs 2002/95/EC directives MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Characteristic Peak Repetitive Reverse Voltage Working Peak Reverse Voltage DC Blocking Voltage Maximum RMS Voltage Maximum Average Forward Rectified Current (Surge applied at TJ= 25℃ Ratings at 25℃ambient temperature unless otherwise specified. Symobl VRRM VRWM VR VRMS I(AV) IFSM VF IR TJ TSTG TRR Cp 140 12 100 1.3 [ ... ]

F12C20CT PDF Datasheet Download