This part is a kind of semiconductor called FMX32S.

Function of this product has 20 Ampere Dual Common Cathode Super Fast Recovery Half Bridge Rectifiers.

Manufacturers : Thinki Semiconductor

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Some of the text within the PDF file :

FMX32S thru FMX36S ® FMX32S/FMX33S/FMX34S/FMX36S Pb Free Plating Product Pb 20 Ampere Dual Common Cathode Super Fast Recovery Half Bridge Rectifiers Features Latest GPP technology with super fast recovery time Low forward voltage drop High current capability Low reverse leakage current High surge current capability Application Automotive Inverters/Solar Inverters Plating Power Supply,SMPS,Adapter and UPS Car Audio Amplifiers and Sound Device Systems Mechanical Data Case: TO-247AD/TO-3P 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: 5.6 gram approximately TO-3P/TO-247AD .142(3.6) .125(3.2) .640(16.25) .620(15.75) Unit : inch (mm) .199(5.05) .175(4.45) .600(15.25) .580(14.75) .8 [ ... ]

FMX32S PDF Datasheet Download