This part is a kind of semiconductor called SBL3040PT.

Function of this product has Dual Common Cathode Schottky Rectifier.

Manufacturers : Vishay

Image and pinout :

Some of the text within the PDF file :

www.vishay.com SBL3030PT, SBL3040PT Vishay General Semiconductor Dual Common Cathode Schottky Rectifier 3 2 1 TO-247AD (TO-3P) PIN 1 PIN 3 PIN 2 CASE PRIMARY CHARACTERISTICS IF(AV) 30 A VRRM 30 V, 40 V IFSM 275 A VF 0.55 V TJ max. Package 125 °C TO-247AD (TO-3P) Diode variations Common cathode FEATURES • Power pack • Guardring for overvoltage protection • Lower power losses, high efficiency • Low forward voltage drop • High forward surge capability • High frequency operation • Solder dip 275 °C max. 10 s, per JESD 22-B106 • Material categorization: For definitions of compliance please see www.vishay.com/doc?99912 TYPICAL APPLICATIONS For use in low voltage, high frequency rectifier of switching mode power supplies, freewheeling diodes, DC/DC converters, [ ... ]

SBL3040PT PDF Datasheet Download