This part is a kind of semiconductor called AP9452G.

Function of this product has N-CHANNEL ENHANCEMENT MODE POWER MOSFET.

Manufacturers : Advanced Power Electronics

Image and pinout :

Some of the text within the PDF file :

AP9452G Advanced Power Electronics Corp. ▼ Lower gate charge ▼ Capable of 2.5V gate drive ▼ Single Drive Requirement N-CHANNEL ENHANCEMENT MODE POWER MOSFET D BVDSS RDS(ON) ID 20V 50mΩ 4A G S Description The Advanced Power MOSFETs from APEC provide the designer with the best combination of fast switching, ruggedized device design, ultra low on-resistance and cost-effectiveness. D S SOT-89 D G Absolute Maximum Ratings Symbol VDS VGS ID@TC=25℃ ID@TC=100℃ IDM PD@TC=25℃ TSTG TJ Parameter Drain-Source Voltage Gate-Source Voltage Continuous Drain Current, VGS @ 4.5V3 Continuous Drain Current, VGS @ 4.5V3 Pulsed Drain Current 1 Rating 20 ±16 4 2.5 12 1.25 0.01 -55 to 150 -55 to 150 Units V V A A A W W/ ℃ ℃ ℃ Total Power Dissipation Linear Dera [ ... ]

AP9452G PDF Datasheet Download