This part is a kind of semiconductor called AOD4186.
Function of this product has N-Channel Enhancement Mode Field Effect Transistor.
Manufacturers : Freescale
Image and pinout :

Some of the text within the PDF file :
AOD4186 N-Channel Enhancement Mode Field Effect Transistor General Description The AOD4186 combines advanced trench MOSFET technology with a low resistance package to provide extremely low RDS(ON). This device is ideal for low voltage inverter applications. Features VDS (V) =40V ID = 35A RDS(ON) < 15mΩ RDS(ON) < 19mΩ (VGS = 10V) (VGS = 10V) (VGS = 4.5V) D G S Absolute Maximum Ratings TA=25°C unless otherwise noted Parameter Symbol VDS Drain-Source Voltage VGS Gate-Source Voltage Continuous Drain Current G Continuous Drain Current Avalanche Current C Repetitive avalanche energy L=0.1mH C TC=25°C Power Dissipation B Maximum 40 ±20 35 27 70 10 8 24 29 50 25 2.5 1.6 -55 to 175 Units V V A TC=25°C TC=100°C TA=25°C TA=70°C ID IDM IDSM IAR EAR PD PDSM TJ, TSTG Pulsed Drain Cu [ ... ]
AOD4186 PDF Datasheet Download
