This part is a kind of semiconductor called AOD454A.

Function of this product has N-Channel MOSFET.

Manufacturers : Alpha & Omega Semiconductors

Image and pinout :

Some of the text within the PDF file :

AOD454A N-Channel Enhancement Mode Field Effect Transistor General Description The AOD454A uses advanced trench technology and design to provide excellent RDS(ON) with low gate charge. With the excellent thermal resistance of the DPAK package, this device is well suited for high current load applications. -RoHS Compliant -Halogen Free* Top View TO252 DPAK Bottom View D D Features VDS (V) = 40V ID = 20A (VGS = 10V) RDS(ON) < 30mΩ (VGS = 10V) RDS(ON) < 40mΩ (VGS = 4.5V) 100% UIS Tested! 100% Rg Tested! D S G G S G S Absolute Maximum Ratings TA=25°C unless otherwise noted Parameter Symbol Drain-Source Voltage VDS Gate-Source Voltage VGS Continuous Drain TC=25°C Current B,H TC=100°C Pulsed Drain Current C Avalanche Current C Repetitive avalanche energy L=0 [ ... ]

AOD454A PDF Datasheet Download