This part is a kind of semiconductor called FRF10A40.

Function of this product has 10.0 Ampere Insulated Full-pak Common Anode Fast Recovery Rectifier.

Manufacturers : Thinki Semiconductor

Image and pinout :

Some of the text within the PDF file :

FRF10A20 thru FRF10A60 ® FRF10A20 thru FRF10A60 Pb Free Plating Product Pb 10.0 Ampere Insulated Full-pak Common Anode Fast Recovery Rectifier 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:Fully molded isolation TO-220FH 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: 2.0 gram approximately .112(2.85) .100(2.55) ITO-220AB .406(10.3) .381(9.7) .134(3.4) .118(3.0) .272(6.9) .248(6.3) Unit : inch (mm) .189(4.8) .165(4.2) .130(3.3) [ ... ]

FRF10A40 PDF Datasheet Download