This part is a kind of semiconductor called 12N50FT.

Function of this product has FDPF12N50FT.

Manufacturers : Fairchild Semiconductor

Image and pinout :

Some of the text within the PDF file :

FDP12N50F / FDPF12N50FT N-Channel MOSFET December 2007 UniFETTM FDP12N50F / FDPF12N50FT N-Channel MOSFET 500V, 11.5A, 0.7Ω Features • RDS(on) = 0.59Ω ( Typ.)@ VGS = 10V, ID = 6A • Low gate charge ( Typ. 21nC) • Low Crss ( Typ. 11pF) • Fast switching • 100% avalanche tested • Improve dv/dt capability • RoHS compliant tm Description These N-Channel enhancement mode power field effect transistors are produced using Fairchild’s proprietary, planar stripe, DMOS technology. This advance technology has been especially tailored to minimize on-state resistance, provide superior switching performance, and withstand high energy pulse in the avalanche and commutation mode. These devices are well suited for high efficient switching mode power supplies and active power factor corr [ ... ]

12N50FT PDF Datasheet Download