2P525A9 MOSFET — Specifications & Equivalents

About the 2P525A9

The 2P525A9 is a MOSFET with a drain–source voltage (V_DS) rating of 100 V and a continuous drain current (I_D) of 1.14 A. It can dissipate up to 3 W and is rated to a junction temperature of 100 °C. It is supplied in the KT991 package.

At a glance

• Type: MOSFET
• Max drain–source voltage (V_DS): 100 V
• Max continuous drain current (I_D): 1.14 A
• Power dissipation (P_D): 3 W
• Max junction temperature (T_J): 100 °C
• Package: KT991

Typical applications

With its 100 V drain–source rating the 2P525A9 sits in the medium-voltage class of switching MOSFETs, typically found in 48 V and 96 V distribution systems, solar and telecom power stages, DC motor drives and intermediate-bus DC-DC converters.

Gate drive and switching notes

Keep gate–source voltage within the ±10 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.

Choosing a replacement for the 2P525A9

A drop-in substitute for the 2P525A9 should match its polarity and offer a drain–source rating of at least 100 V and a continuous drain current rating of at least 1.14 A.

Mechanically, check the replacement against the KT991 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 2P525A9?

The 2P525A9 is a MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 100 V drain-source and 1.14 A continuous drain current.

What is the maximum voltage of the 2P525A9?

The 2P525A9 has a maximum drain-source voltage (Vds) of 100 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.

How much current can the 2P525A9 handle?

It is rated for 1.14 A of continuous drain current, with power dissipation limited to 3 W. Real-world capability depends on your heatsinking and ambient temperature.

What package does the 2P525A9 come in?

It is listed in KT991. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the 2P525A9?

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.