MMBF2202PT1 MOSFET — Specifications & Equivalents

About the MMBF2202PT1

The MMBF2202PT1 is a MOSFET with a drain–source voltage (V_DS) rating of 20 V and a continuous drain current (I_D) of 0.3 A. It can dissipate up to 0.15 W and is rated to a junction temperature of 150 °C. It is supplied in the SOT-323 package.

At a glance

• Type: MOSFET
• Max drain–source voltage (V_DS): 20 V
• Max continuous drain current (I_D): 0.3 A
• Power dissipation (P_D): 0.15 W
• Max junction temperature (T_J): 150 °C
• Package: SOT-323

Typical applications

With its 20 V drain–source rating the MMBF2202PT1 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.

At 0.3 A it is aimed at small-signal and light-load switching rather than power conversion.

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

Choosing a replacement for the MMBF2202PT1

A drop-in substitute for the MMBF2202PT1 should match its polarity and offer a drain–source rating of at least 20 V and a continuous drain current rating of at least 0.3 A.

Mechanically, check the replacement against the SOT-323 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 MMBF2202PT1?

The MMBF2202PT1 is a MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 20 V drain-source and 0.3 A continuous drain current.

What is the maximum voltage of the MMBF2202PT1?

The MMBF2202PT1 has a maximum drain-source voltage (Vds) of 20 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.

How much current can the MMBF2202PT1 handle?

It is rated for 0.3 A of continuous drain current, with power dissipation limited to 0.15 W. Real-world capability depends on your heatsinking and ambient temperature.

What package does the MMBF2202PT1 come in?

It is listed in SOT-323. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the MMBF2202PT1?

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.