QFET QFET QFET QFET is a switching component for fast switching power electronic applications. It is a solid state switch that uses semiconductor technology to control current, allowing it to be switched on and off to control the flow of electricity. QFET QFET QFET QFET is a high-performance switch that has fast switching speeds and low losses. It is widely used in power electronic systems.
This document provides design specifications for the FQD4N25 and FQU4N25, which are N-Channel enhancement mode power field effect transistors produced using Fairchild's proprietary planar stripe DMOS technology. These devices feature low on-state resistance and superior switching performance, making them well-suited for high efficiency switching DC/DC converters and switch mode power supplies.
| Drain-Source Voltage | 250 V |
|---|---|
| Continuous Drain Current (Tc = 25°C) | 3.0 A |
| On-Resistance | 1.75 Ω @ Vgs = 10 V |
| Gate Charge (Typical) | 4.3 nC |
| Reverse Transfer Capacitance (Typical) | 4.8 pF |
| Power Dissipation (Ta = 25°C) | 25 W |
| Operating Temperature Range | -55 to +150 °C |
These devices are well suited for high efficiency switching DC/DC converters and switch mode power supply.
The maximum continuous drain current is 3.0 A when the temperature is 25°C.
The maximum power dissipation is 25 W when the ambient temperature is 25°C.