This part is a kind of semiconductor called AP4503AGM-HF.
Function of this product has N AND P-CHANNEL ENHANCEMENT MODE POWER MOSFET.
Manufacturers : Advanced Power Electronics
Image and pinout :

Some of the text within the PDF file :
AP4503AGM-HF Halogen-Free Product Advanced Power Electronics Corp. ▼ Simple Drive Requirement D2 D2 D1 D1 N AND P-CHANNEL ENHANCEMENT MODE POWER MOSFET N-CH BVDSS RDS(ON) ID G2 S2 30V 28mΩ 6.9A -30V 36mΩ -6.3A ▼ Low On-resistance ▼ Fast Switching Performance ▼ RoHS Compliant & Halogen-Free SO-8 S1 G1 P-CH BVDSS RDS(ON) ID Description Advanced Power MOSFETs from APEC provide the designer with the best combination of fast switching, ruggedized device design, low on-resistance and costeffectiveness. The SO-8 package is widely preferred for commercial-industrial surface mount applications and suited for low voltage applications such as DC/DC converters. D1 D2 G1 S1 G2 S2 Absolute Maximum Ratings Symbol VDS VGS ID@TA=25℃ ID@TA=70℃ IDM PD@TA=25℃ TSTG TJ Parameter D [ ... ]
AP4503AGM-HF PDF Datasheet Download
