This part is a kind of semiconductor called 70N20.

Function of this product has FDA70N20.

Manufacturers : Fairchild Semiconductor

Image and pinout :

Some of the text within the PDF file :

FDA70N20 N-Channel UniFETTM MOSFET December 2013 FDA70N20 N-Channel UniFETTM MOSFET 200 V, 70 A, 35 mΩ Features • RDS(on) = 35 mΩ (Max.) @ VGS = 10 V, ID = 35 A • Low Gate Charge (Typ. 66 nC) • Low Crss (Typ. 89 pF) • 100% Avalanche Tested Description UniFETTM MOSFET is Fairchild Semiconductor’s high voltage MOSFET family based on planar stripe and DMOS technology. This MOSFET is tailored to reduce on-state resistance, and to provide better switching performance and higher avalanche energy strength. This device family is suitable for switching power converter applications such as power factor correction (PFC), flat panel display (FPD) TV power, ATX and electronic lamp ballasts. Applications • Uninterruptible Power Supply • AC-DC Power Supply D G G D S TO-3PN S T [ ... ]

70N20 PDF Datasheet Download