This part is a kind of semiconductor called AOD256.

Function of this product has N-Channel MOSFET.

Manufacturers : Alpha & Omega Semiconductors

Image and pinout :

Some of the text within the PDF file :

AOD256 150V N-Channel MOSFET General Description The AOD256 uses trench MOSFET technology that is uniquely optimized to provide the most efficient high frequency switching performance. Both conduction and switching power losses are minimized due to an extremely low combination of RDS(ON), Ciss and Coss. This device is ideal for boost converters and synchronous rectifiers for consumer, telecom, industrial power supplies and LED backlighting. Product Summary VDS ID (at VGS=10V) RDS(ON) (at VGS=10V) RDS(ON) (at VGS=4.5V) 150V 19A < 85mΩ < 100mΩ 100% UIS Tested 100% Rg Tested TO252 DPAK Top View D D Bottom View D S G S G G S Absolute Maximum Ratings TA=25° C unless otherwise noted Parameter Symbol Drain-Source Voltage VDS Gate-Source Voltage Continuous Drain Current Pulsed Drain C [ ... ]

AOD256 PDF Datasheet Download