This part is a kind of semiconductor called AO4466.

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 :

AO4466 30V N-Channel MOSFET General Description The AO4466 uses advanced trench technology to provide excellent RDS(ON) and low gate charge. This device is suitable for use as a load switch or in PWM applications. The source leads are separated to allow a Kelvin connection to the source, which may be used to bypass the source inductance. * RoHS and Halogen-Free Compliant Product Summary VDS (V) = 30V ID = 10A RDS(ON) < 23mΩ RDS(ON) < 35mΩ (VGS = 10V) (VGS = 10V) (VGS = 4.5V) 100% UIS Tested 100% Rg Tested Top View D D D D SOIC-8 Bottom View D G S S S Absolute Maximum Ratings TA=25°C unless otherwise noted Parameter Symbol Drain-Source Voltage VDS Gate-Source Voltage VGS Continuous Drain TA=25°C Current AF TA=70°C Pulsed Drain Current B ID IDM TA=25°C Power Dis [ ... ]

AO4466 PDF Datasheet Download