This part is a kind of semiconductor called 47CTQ020PBF.

Function of this product has SCHOTTKY RECTIFIER.

Manufacturers : International Rectifier

Image and pinout :

Some of the text within the PDF file :

Bulletin PD-20854 rev. A 02/07 47CTQ020PbF SCHOTTKY RECTIFIER 40 Amp IF(AV) = 40Amp VR = 20V Major Ratings and Characteristics Characteristics IF(AV) Rectangular waveform VRRM IFSM @ tp = 5 μs sine VF TJ @ 20 Apk, TJ= 125 °C Description/ Features Units A V A V °C This center tap Schottky rectifier has been optimized for ultra low forward voltage drop specifically for 3.3V output power supplies. The proprietary barrier technology allows for reliable operation up to 150 °C junction temperature. Typical applications are in parallel switching power supplies, converters, reverse battery protection, and redundant power subsystems. 150 °C TJ operation Values 40 20 1000 0.34 - 55 to 150 Center tap configuration Optimized for 3.3V application Ultra low forward voltage [ ... ]

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