This part is a kind of semiconductor called 15MQ040NPbF.

Function of this product has SCHOTTKY RECTIFIER.

Manufacturers : International Rectifier

Image and pinout :

Some of the text within the PDF file :

Bulletin PD-20775 06/04 15MQ040NPbF SCHOTTKY RECTIFIER 3 Amp IF(AV) = 3Amp VR = 40V Major Ratings and Characteristics Characteristics IF VRRM IFSM @ tp = 5 µs sine VF TJ @ 2Apk, TJ=125°C range DC Description/ Features Units A V A V °C The 15MQ040NPbF Schottky rectifier is designed to be used for low-power applications where a reverse voltage of 40 volts is ancountered and surface mountable is required. Value 3 40 330 0.43 - 40 to 150 Applications Switching power supplies Meter protection Reverse protection for power input to PC board circuits Battery isolation and charging Low threshold voltage diode Free-wheeling or by-pass diode Low voltage clamp Features Surface mountable Extremely low forward voltage Improved reverse blocking voltage capability relative to other similar size [ ... ]

15MQ040NPbF PDF Datasheet Download