2P821A MOSFET — Specifications & Equivalents

About the 2P821A

The 2P821A is a MOSFET with a drain–source voltage (V_DS) rating of 65 V and a continuous drain current (I_D) of 1.5 A. It can dissipate up to 20 W and is rated to a junction temperature of 125 °C. It is supplied in the КТ-83 package.

At a glance

• Type: MOSFET
• Max drain–source voltage (V_DS): 65 V
• Max continuous drain current (I_D): 1.5 A
• Power dissipation (P_D): 20 W
• Max junction temperature (T_J): 125 °C
• Package: КТ-83

Typical applications

With its 65 V drain–source rating the 2P821A sits in the mid-range class of switching MOSFETs, typically found in 24 V and 48 V industrial and battery systems, motor drives and H-bridges and load and hot-swap switching.

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

Choosing a replacement for the 2P821A

A drop-in substitute for the 2P821A should match its polarity and offer a drain–source rating of at least 65 V and a continuous drain current rating of at least 1.5 A.

Mechanically, check the replacement against the КТ-83 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 2P821A?

The 2P821A is a MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 65 V drain-source and 1.5 A continuous drain current.

What is the maximum voltage of the 2P821A?

The 2P821A has a maximum drain-source voltage (Vds) of 65 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.

How much current can the 2P821A handle?

It is rated for 1.5 A of continuous drain current, with power dissipation limited to 20 W. Real-world capability depends on your heatsinking and ambient temperature.

What package does the 2P821A come in?

It is listed in КТ-83. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the 2P821A?

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.