24N50C MOSFET — Specifications & Equivalents

About the 24N50C

The 24N50C is a MOSFET with a drain–source voltage (V_DS) rating of 500 V and a continuous drain current (I_D) of 24 A. It can dissipate up to 290 W and is rated to a junction temperature of 150 °C. It is supplied in the TO-247AB package.

At a glance

• Type: MOSFET
• Max drain–source voltage (V_DS): 500 V
• Max continuous drain current (I_D): 24 A
• Power dissipation (P_D): 290 W
• Max junction temperature (T_J): 150 °C
• Package: TO-247AB

Typical applications

With its 500 V drain–source rating the 24N50C sits in the high-voltage (offline) class of switching MOSFETs, typically found in primary-side switching in offline SMPS (flyback, forward and quasi-resonant), active PFC boost stages, half-bridge and full-bridge inverters, induction heating and electronic ballasts and BLDC and AC motor drives. The rating leaves usable margin above the ~325 V DC bus obtained by rectifying 230 VAC mains, which is why this class dominates offline power supplies.

Gate drive and switching notes

Keep gate–source voltage within the ±30 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.

Switching behaviour is characterised by an output capacitance (C_oss) of 520 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.

Choosing a replacement for the 24N50C

A drop-in substitute for the 24N50C should match its polarity and offer a drain–source rating of at least 500 V and a continuous drain current rating of at least 24 A.

Mechanically, check the replacement against the TO-247AB 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 24N50C?

The 24N50C is a MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 500 V drain-source and 24 A continuous drain current.

What is the maximum voltage of the 24N50C?

The 24N50C has a maximum drain-source voltage (Vds) of 500 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.

How much current can the 24N50C handle?

It is rated for 24 A of continuous drain current, with power dissipation limited to 290 W. Real-world capability depends on your heatsinking and ambient temperature.

What package does the 24N50C come in?

It is listed in TO-247AB. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the 24N50C?

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.