This part is a kind of semiconductor called SF56.

Function of this product has 5.0 Amp Super Fast Rectifier 50 to 600 Volts.

Manufacturers : Micro Commercial Components

Image and pinout :

Some of the text within the PDF file :

MCC Features • • • •
   omponents 21201 Itasca Street Chatsworth    !"# $ %    !"# SF51 THRU SF57 5.0 Amp Super Fast Rectifier 50 to 600 Volts DO-201AD Superfast recovery times-epitaxial construction Low forward voltage, high current capability Low leakage High surge capability Maximum Ratings • • • Operating Junction Temperature: -55°C to +150°C Storage Temperature: -55°C to +150 °C Maximum Thermal Resistance; 25 °C/W Junction To Ambient MCC Part Number SF51 SF52 SF53 SF54 SF35 SF56 SF57 Maximum Recurrent Peak Reverse Voltage 50V 100V 150V 200V 300V 400V 600V Maximum RMS Voltage 35V 70V 105V 140V 210V 280V 420V Maximum DC Blocking Voltage 50V 100V 150V 200V 300V 400V 600V D A Cathode Mark B Electrical Charact [ ... ]

SF56 PDF Datasheet Download