2P771A91 MOSFET — Specifications & Equivalents

About the 2P771A91

The 2P771A91 is a MOSFET with a drain–source voltage (V_DS) rating of 100 V and a continuous drain current (I_D) of 40 A. It can dissipate up to 150 W and is rated to a junction temperature of 100 °C. It is supplied in the KT90 package.

At a glance

• Type: MOSFET
• Max drain–source voltage (V_DS): 100 V
• Max continuous drain current (I_D): 40 A
• Power dissipation (P_D): 150 W
• Max junction temperature (T_J): 100 °C
• Package: KT90

Typical applications

With its 100 V drain–source rating the 2P771A91 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 ±20 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.

Choosing a replacement for the 2P771A91

A drop-in substitute for the 2P771A91 should match its polarity and offer a drain–source rating of at least 100 V and a continuous drain current rating of at least 40 A.

Mechanically, check the replacement against the KT90 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 2P771A91?

The 2P771A91 is a MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 100 V drain-source and 40 A continuous drain current.

What is the maximum voltage of the 2P771A91?

The 2P771A91 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 2P771A91 handle?

It is rated for 40 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 2P771A91 come in?

It is listed in KT90. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the 2P771A91?

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.