FDH20N40/FDP20N40 is a N-channel MOSFET produced by Fairchild Semiconductor Corporation. Its rated voltage is 400V and its rated current is 20A. It has low gate charge Qg, high withstand voltage, high switching speed and low EMI.
This document is a technical datasheet for the Fairchild Semiconductor FDH20N40 (TO-247 package) and FDP20N40 (TO-220AB package). These are 20A, 400V N-channel SMPS Power MOSFETs designed for use in Switch Mode Power Supplies (SMPS), including PFC Boost, Two-Switch Forward, Single Switch Forward, Flyback, and Buck converters. Key features include low gate charge, improved ruggedness against high dv/dt, and a rated junction temperature of 175°C.
| Drain Current (Continuous, Tj=25°C) | 20 A |
|---|---|
| Drain Current (Continuous, Tj=100°C) | 14 A |
| Drain to Source Voltage | 400 V |
| Gate Threshold Voltage (Typ) | 3.5 V |
| Drain to Source On-Resistance (Typ) | 0.216 Ohm |
| Operating Junction Temperature | -55 to 175 °C |
The device supports a drain to source voltage of up to 400 V and a continuous drain current of 20 A at 25°C.
The MOSFET can operate with a rated junction temperature up to 175°C.
An 8-32 or M3 screw requires a mounting torque of 10 lbf*in (1.1 N*m).