This part is a kind of semiconductor called AO4412.

Function of this product has N-Channel Enhancement Mode Field Effect Transistor.

Manufacturers : Alpha & Omega Semiconductors

Image and pinout :

Some of the text within the PDF file :

AO4412 N-Channel Enhancement Mode Field Effect Transistor General Description provide Features VDS (V) = 30V ID = 8.5A (V GS = 10V) RDS(ON) < 26mΩ (VGS = 10V) RDS(ON) < 34mΩ (VGS = 4.5V) The AO4412 uses advanced trench technology to excellent RDS(ON) and ultra low gate charge for use has a fast high side switch. The source leads are separated to allow a Kelvin connection to the source, which may be used to bypass the source inductance.Standard product AO4412 is Pb-free (meets ROHS & Sony 259 specifications). AO4412L is a Green Product ordering option. AO4412 and AO4412L are electrically identical. D S S S G D D D D G S SOIC-8 Absolute Maximum Ratings TA=25°C unless otherwise noted Parameter Symbol VDS Drain-Source Voltage VGS Gate-Source Voltage Continuous Dr [ ... ]

AO4412 PDF Datasheet Download