This part is a kind of semiconductor called WPM2341.

Function of this product has P-Channel Enhancement Mode Mosfet.

Manufacturers : WillSEMI

Image and pinout :

Some of the text within the PDF file :

WPM2341 WPM2341 P-Channel Enhancement Mode Mosfet http://www.willsemi.com Features z Higher Efficiency Extending Battery Life z Miniature SOT23-3 Surface Mount Package z Super high density cell design for extremely low RDS (ON) 1 3 Applications zDC/DC Converter zLoad Switch zBattery Powered System zLCD Display inverter zPower Management in Portable, Battery Powered Products 2 SOT 23-3 pin connections : PïChannel ABSOLUTE MAXIMUM RATINGS TA = 25 °C, unless otherwise noted Parameter Drain-Source Voltage Gate-Source Voltage Continuous Drain Current (TJ = 150 °C) a Symbol VDS VGS ID IDM IS 5s Steady State -20 ±8 Unit G 1 3 D V -3.5 -2.5 S 2 TA=25°C TA=80°C -4.3 -3.2 -20 -1.7 1.25 0.7 Top View Pulsed Drain Current Continuous Source Current (Diode Conduction) a [ ... ]

WPM2341 PDF Datasheet Download