This document introduces the FDH34N40 product released by Fairchild Semiconductor Corporation in 2002. The product is an N-channel SMPS power MOSFET suitable for various switch mode power supply applications. It features low gate charge Qg, improved gate, avalanche and high reapplied dv/dt ruggedness, reduced rDS(ON), reduced Miller capacitance and low input capacitance, improved switching speed with low EMI, and a rated junction temperature of 175°C.
This document provides comprehensive technical specifications and characteristics for the Fairchild Semiconductor FDH34N40. It is an N-Channel SMPS Power MOSFET rated at 34 Amperes continuous drain current and 400 Volts drain-to-source voltage, packaged in a JEDEC TO-247 case.
The datasheet details the device's suitability for various switch-mode power supply topologies, including PFC Boost, Forward Converter, Flyback, and Buck converters. Key features highlighted include low gate charge requirements, improved ruggedness against avalanche and high dv/dt stress, reduced Miller capacitance, and a junction temperature rating of 175°C.
| Junction Temperature Rating | 175°C |
|---|---|
| Package Type | TO-247 |
The device is suitable for Switch Mode Power Supplies (SMPS) such as PFC Boost, Two-Switch Forward Converter, Single Switch Forward Converter, Flyback Converter, and Buck Converter.
The device has a rated junction temperature of 175°C.