This part is a kind of semiconductor called APM3055L.
Function of this product has N-Channel Enhancement Mode MOSFET.
Manufacturers : Etc
Image and pinout :
Some of the text within the PDF file :
APM3055L N-Channel Enhancement Mode MOSFET Features • • • • 30V/12A, RDS(ON)=100mΩ(max) @ VGS=10V RDS(ON)=200mΩ(max) @ VGS=4.5V Super High Dense Cell Design High Power and Current Handling Capability TO-252 and SOT-223 Packages Pin Description 1 1 2 3 2 3 G D S Applications • • Switching Regulators Switching Converters G D S Top View of TO-252 Top View of SOT-223 Ordering and Marking Information A P M 3 055 L H a n d lin g C o d e Tem p. R ange Package C ode AP M 3055L XXXXX Package C ode U : T O -2 5 2 V : S O T -2 2 3 O p e ra tio n J u n c tio n T e m p . R a n g e C : -5 5 to 1 5 0 ° C H a n d lin g C o d e TR : Tape & R eel A P M 3 0 5 5 L U /V : X X X X X - D a te C o d e Absolute Maximum Ratings Symbol VDSS VGSS ID IDM Drain-Source Voltage Gate-Sou [ ... ]