This part is a kind of semiconductor called APM2509N.

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 :

APM2509N N-Channel Enhancement Mode MOSFET Features • • • • 25V/60A , RDS(ON)=8mΩ(typ.) @ VGS=10V RDS(ON)=11mΩ(typ.) @ VGS=4.5V Super High Dense Advanced Cell Design for Extremely Low RDS(ON) Reliable and Rugged TO-252 Package Pin Description 1 2 3 G D S Top View of TO-252 D Applications • Power Management in Desktop Computer or DC/DC Converters. G S Ordering and Marking Information APM 2509N L e a d F re e C o d e H a n d lin g C o d e Tem p. Range Package Code N-Channel MOSFET Package Code U : T O -2 5 2 O p e ra tin g 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 TU : Tube TR : Tape & R eel L e a d F re e C o d e L : L e a d F re e D e v ic e B la n k : O rig in a l D e v ic e AP M 2509N U : AP M 2509N XXXXX XXXXX - D a te [ ... ]

APM2509N PDF Datasheet Download