IRFP351 MOSFET — Specifications & Equivalents

About the IRFP351

The IRFP351 is a MOSFET with a drain–source voltage (V_DS) rating of 350 V and a continuous drain current (I_D) of 15 A. It can dissipate up to 150 W and is rated to a junction temperature of 150 °C. It is supplied in the TO3P package.

At a glance

• Type: MOSFET
• Max drain–source voltage (V_DS): 350 V
• Max continuous drain current (I_D): 15 A
• Power dissipation (P_D): 150 W
• Max junction temperature (T_J): 150 °C
• Package: TO3P
• Manufacturer: Commonly produced by International Rectifier (now Infineon)

Typical applications

With its 350 V drain–source rating the IRFP351 sits in the medium-high-voltage class of switching MOSFETs, typically found in telecom and industrial DC rails, boost and flyback converters, LED and backlight drivers and power-factor-correction stages. Common where the bus sits well above 100 V but below rectified mains.

Gate drive and switching notes

Keep gate–source voltage within the ±20 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.

Switching behaviour is characterised by an output capacitance (C_oss) of 390 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.

Choosing a replacement for the IRFP351

A drop-in substitute for the IRFP351 should match its polarity and offer a drain–source rating of at least 350 V and a continuous drain current rating of at least 15 A.

Mechanically, check the replacement against the TO3P footprint and confirm the pin order — parts sharing a package outline do not always share a pinout.

Where the application switches inductive loads or runs near the voltage limit, keep extra headroom rather than choosing a part that only just meets the original numbers.

Frequently asked questions

What is the IRFP351?

The IRFP351 is a MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 350 V drain-source and 15 A continuous drain current.

What is the maximum voltage of the IRFP351?

The IRFP351 has a maximum drain-source voltage (Vds) of 350 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.

How much current can the IRFP351 handle?

It is rated for 15 A of continuous drain current, with power dissipation limited to 150 W. Real-world capability depends on your heatsinking and ambient temperature.

What package does the IRFP351 come in?

It is listed in TO3P. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the IRFP351?

This page lists 17 candidate equivalents matched on electrical ratings and package. Any replacement should meet or exceed the original voltage, current and dissipation figures and use a compatible drive level.