This document describes the FQT3P20 QFET TM FQT3P20 200V P-Channel MOSFET from Fairchild Semiconductor Corporation. These P-Channel enhancement mode power field effect transistors are produced using Fairchild’s proprietary, planar stripe, DMOS technology. This advanced technology minimizes on-state resistance, provides superior switching performance, and withstands high energy pulse in the avalanche and commutation mode. These devices are well suited for high efficiency switching DC/DC converters.