MMBF170LT1G MOSFET — Specifications & Equivalents

About the MMBF170LT1G

The MMBF170LT1G is a MOSFET with a drain–source voltage (V_DS) rating of 60 V and a continuous drain current (I_D) of 0.25 A. It can dissipate up to 0.3 W and is rated to a junction temperature of 150 °C. It is supplied in the SOT23 package.

At a glance

• Type: MOSFET
• Max drain–source voltage (V_DS): 60 V
• Max continuous drain current (I_D): 0.25 A
• Power dissipation (P_D): 0.3 W
• Max junction temperature (T_J): 150 °C
• Package: SOT23

Typical applications

With its 60 V drain–source rating the MMBF170LT1G 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.

At 0.25 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.

Choosing a replacement for the MMBF170LT1G

A drop-in substitute for the MMBF170LT1G should match its polarity and offer a drain–source rating of at least 60 V and a continuous drain current rating of at least 0.25 A.

Mechanically, check the replacement against the SOT23 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 MMBF170LT1G?

The MMBF170LT1G is a MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 60 V drain-source and 0.25 A continuous drain current.

What is the maximum voltage of the MMBF170LT1G?

The MMBF170LT1G has a maximum drain-source voltage (Vds) of 60 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.

How much current can the MMBF170LT1G handle?

It is rated for 0.25 A of continuous drain current, with power dissipation limited to 0.3 W. Real-world capability depends on your heatsinking and ambient temperature.

What package does the MMBF170LT1G come in?

It is listed in SOT23. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the MMBF170LT1G?

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.