This part is a kind of semiconductor called B0540W.

Function of this product has SCHOTTKY RECTIFIER.

Manufacturers : Silicon Standard

Image and pinout :

Some of the text within the PDF file :

B0520LW/B0530W/B0540W SCHOTTKY RECTIFIER PRODUCT SUMMARY SOD-123 Plastic-Encapsulate Diodes Lower Gate Charge Small Footprint & Low Profile Package FEATURES Low Forward Voltage Drop Guard Ring Construction for Transient Prote High Conductance Also Available in Lead Free Version MARKING: B0520LW: SD B0530W: SE B0540W: SF Pb-free; RoHS-compliant SOD-123 + - MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS, SINGLE DIODE @TA=25 oC Parameter Peak Repetitive Peak reverse voltage Working Peak Reverse Voltage DC Blocking Voltage RMS Reverse Voltage Average Rectified Output Current Peak forward surge current Power Dissipation Thermal Resistance Junction to Ambient Storage temperature Voltage Rate of Change Symbol VRRM VRWM VR VR(RMS) IO IFSM Pd RθJA TSTG dv/dt B0520LW 20 14 B0530W 30 21 500 [ ... ]

B0540W PDF Datasheet Download