This part is a kind of semiconductor called SR540.

Function of this product has (SR520 - SR5200) SCHOTTKY BARRIER RECTIFIER.

Manufacturers : MIC

Image and pinout :

Some of the text within the PDF file :

SCHOTTKY BARRIER RECTIFIER SR520 - SR5200 FEATURES • • • • • • • • Plastic package has Underwriters Laboratory Flammability Classification 94V-0 Metal silicon junction ,majority carrier conduction Guard ring for overvoltage protection Low power loss, high efficiency High current capability, Low forward voltage drop Single rectifier construction High surge capability For use in low voltage, high frequency inverters, free wheeling ,and polarity protection applications • High temperature soldering guaranteed: 260 °C/10 seconds, 0.25”(6.35mm)from case • Component in accordance to RoHS 2002/95/EC and WEEE 2002/96/EC Voltage Range Forward Current 20 to 200 Volts 5.0 Amperes MECHANICAL DATA • • • • • Case: JEDEC TO-220AC molded [ ... ]

SR540 PDF Datasheet Download