This part is a kind of semiconductor called AOD405.

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

Manufacturers : Alpha & Omega Semiconductors

Image and pinout :

Some of the text within the PDF file :

Rev 3: Sept 2004 AOD405, AOD405L (Green Product) P-Channel Enhancement Mode Field Effect Transistor General Description The AOD405 uses advanced trench technology to provide excellent RDS(ON), low gate charge and low gate resistance. With the excellent thermal resistance of the DPAK package, this device is well suited for high current load applications. AOD405L (Green Product) is offered in a lead-free package. Features VDS (V) = -30V ID = -18A RDS(ON) < 32mΩ (VGS = -10V) RDS(ON) < 60mΩ (VGS = -4.5V) TO-252 D-PAK D Top View Drain Connected to Tab G S G D S Absolute Maximum Ratings TA=25°C unless otherwise noted Parameter Symbol VDS Drain-Source Voltage VGS Gate-Source Voltage Continuous Drain Current B,G Pulsed Drain Current Avalanche Current C Repetitiv [ ... ]

AOD405 PDF Datasheet Download