This part is a kind of semiconductor called AP9576GM.
Function of this product has P-CHANNEL ENHANCEMENT MODE POWER MOSFET.
Manufacturers : Advanced Power Electronics
Image and pinout :

Some of the text within the PDF file :
AP9576GM Pb Free Plating Product Advanced Power Electronics Corp. ▼ Lower On-resistance ▼ Simple Drive Requirement ▼ Fast Switching Characteristic D D D D P-CHANNEL ENHANCEMENT MODE POWER MOSFET BVDSS RDS(ON) G -60V 90mΩ -4A ID SO-8 S S S Description The Advanced Power MOSFETs from APEC provide the designer with the best combination of fast switching, ruggedized device design, low on-resistance and cost-effectiveness. The SO-8 package is universally preferred for all commercial-industrial surface mount applications and suited for low voltage applications such as DC/DC converters. D G S Absolute Maximum Ratings Symbol VDS VGS ID@TA=25℃ ID@TA=70℃ IDM PD@TA=25℃ TSTG TJ Parameter Drain-Source Voltage Gate-Source Voltage Continuous Drain Current Continuous Drain Current [ ... ]
AP9576GM PDF Datasheet Download
