This part is a kind of semiconductor called 38N30.

Function of this product has FQA38N30.

Manufacturers : Fairchild Semiconductor

Image and pinout :

Some of the text within the PDF file :

FQA38N30 N-Channel QFET® MOSFET FQA38N30 N-Channel QFET® MOSFET 300 V, 38.4 A, 85 mΩ Features • 38.4 A, 300 V, RDS(on) = 85 mΩ (Max.) @ VGS = 10 V, ID = 19.2 A • Low Gate Charge (Typ. 90 nC) • Low Crss (Typ. 70 pF) • 100% Avalanche Tested • RoHS compliant August 2014 Description These N-Channel enhancement mode power field effect transistors are produced using Fairchild’s proprietary, planar stripe, DMOS technology. This advanced 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 efficiency switch mode power supply, power factor correction, electronic lamp ballast based on half bridge. D G DS TO- [ ... ]

38N30 PDF Datasheet Download