AON7432 MOSFET — Specifications & Equivalents

About the AON7432

The AON7432 is a MOSFET with a drain–source voltage (V_DS) rating of 30 V and a continuous drain current (I_D) of 18 A. It can dissipate up to 20.8 W and is rated to a junction temperature of 150 °C. It is supplied in the DFN3X3EP package.

At a glance

• Type: MOSFET
• Max drain–source voltage (V_DS): 30 V
• Max continuous drain current (I_D): 18 A
• Power dissipation (P_D): 20.8 W
• Max junction temperature (T_J): 150 °C
• Package: DFN3X3EP
• Manufacturer: Commonly produced by Alpha & Omega Semiconductor

Typical applications

With its 30 V drain–source rating the AON7432 sits in the low-voltage class of switching MOSFETs, typically found in 12 V and 24 V automotive and industrial rails, synchronous buck converters, load switching and reverse-polarity protection and H-bridges for small motors.

Gate drive and switching notes

Keep gate–source voltage within the ±12 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.

Switching behaviour is characterised by an output capacitance (C_oss) of 98 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.

Choosing a replacement for the AON7432

A drop-in substitute for the AON7432 should match its polarity and offer a drain–source rating of at least 30 V and a continuous drain current rating of at least 18 A.

Mechanically, check the replacement against the DFN3X3EP 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 AON7432?

The AON7432 is a MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 30 V drain-source and 18 A continuous drain current.

What is the maximum voltage of the AON7432?

The AON7432 has a maximum drain-source voltage (Vds) of 30 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.

How much current can the AON7432 handle?

It is rated for 18 A of continuous drain current, with power dissipation limited to 20.8 W. Real-world capability depends on your heatsinking and ambient temperature.

What package does the AON7432 come in?

It is listed in DFN3X3EP. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the AON7432?

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.