AOD452A MOSFET — Specifications & Equivalents

About the AOD452A

The AOD452A is a MOSFET with a drain–source voltage (V_DS) rating of 25 V and a continuous drain current (I_D) of 55 A. It can dissipate up to 50 W and is rated to a junction temperature of 175 °C. It is supplied in the TO252 package.

At a glance

• Type: MOSFET
• Max drain–source voltage (V_DS): 25 V
• Max continuous drain current (I_D): 55 A
• Power dissipation (P_D): 50 W
• Max junction temperature (T_J): 175 °C
• Package: TO252
• Manufacturer: Commonly produced by Alpha & Omega Semiconductor

Typical applications

With its 25 V drain–source rating the AOD452A sits in the very-low-voltage class of switching MOSFETs, typically found in battery protection and power-path switching, point-of-load converters and logic-level load switching in portable devices.

The 55 A current rating puts it in high-current territory, where conduction loss (I² × R_DS(on)) and thermal design usually matter more than switching loss. Budget for adequate copper area and a heatsink.

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 275 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.

Choosing a replacement for the AOD452A

A drop-in substitute for the AOD452A should match its polarity and offer a drain–source rating of at least 25 V and a continuous drain current rating of at least 55 A.

Mechanically, check the replacement against the TO252 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 AOD452A?

The AOD452A is a MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 25 V drain-source and 55 A continuous drain current.

What is the maximum voltage of the AOD452A?

The AOD452A has a maximum drain-source voltage (Vds) of 25 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.

How much current can the AOD452A handle?

It is rated for 55 A of continuous drain current, with power dissipation limited to 50 W. Real-world capability depends on your heatsinking and ambient temperature.

What package does the AOD452A come in?

It is listed in TO252. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the AOD452A?

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.