This part is a kind of semiconductor called AO4803A.

Function of this product has P-Channel 30-V (D-S) MOSFET.

Manufacturers : FreesCale

Image and pinout :

Some of the text within the PDF file :

Freescale AO4803A/ MC4803A P-Channel 30-V (D-S) MOSFET Key Features: • Low rDS(on) trench technology • Low thermal impedance • Fast switching speed Typical Applications: • White LED boost converters • Automotive Systems • Industrial DC/DC Conversion Circuits PRODUCT SUMMARY rDS(on) (mΩ) 52 @ VGS = -10V 89 @ VGS = -4.5V VDS (V) -30 ID(A) -5.2 -4.0 ABSOLUTE MAXIMUM RATINGS (TA = 25°C UNLESS OTHERWISE NOTED) Parameter Symbol Limit VDS Drain-Source Voltage -30 VGS Gate-Source Voltage ±20 TA=25°C -5.2 ID Continuous Drain Current a TA=70°C -4.1 IDM Pulsed Drain Current b -20 a I -2.5 Continuous Source Current (Diode Conduction) S T =25°C 2.1 A PD Power Dissipation a TA=70°C 1.3 TJ, Tstg -55 to 150 Operating Junction and Storage Temperature Range Units V A A W °C Maxim [ ... ]

AO4803A PDF Datasheet Download