This part is a kind of semiconductor called APM4416K.

Function of this product has N-Channel Enhancement Mode MOSFET.

Manufacturers : Anpec Electronics Coropration

Image and pinout :

Some of the text within the PDF file :

APM4416K N-Channel Enhancement Mode MOSFET Features • 30V/4A, RDS(ON)=15mΩ(typ.) @ VGS=10V RDS(ON)=22mΩ(typ.) @ VGS=4.5V Super High Dense Cell Design Reliable and Rugged Pin Description D D D D • • • Lead Free Available (RoHS Compliant) S S S G Top View of SOP − 8 ( 5,6,7,8 ) DD DD Applications • Power Management in Notebook Computer, Portable Equipment and Battery Powered Systems (4) G S S S (1, 2, 3) N-Channel MOSFET Ordering and Marking Information APM 4220 Lead Free Code Handling Code Tem p. Range Package Code Package Code K : SO P-8 O perating Junction Tem p. Range C : -55 to 150°C Handling Code TU : Tube TR : Tape & Reel Lead Free Code L : Lead Free Dev ice Blank : Original Dev ice XXXXX - Date Code APM 4220 K : APM 4220 XXXXX Note: AN [ ... ]

APM4416K PDF Datasheet Download