STF20NF06L MOSFET — Specifications & Equivalents

About the STF20NF06L

The STF20NF06L is a MOSFET with a drain–source voltage (V_DS) rating of 60 V and a continuous drain current (I_D) of 20 A. It can dissipate up to 28 W and is rated to a junction temperature of 175 °C. It is supplied in the TO220FP package.

At a glance

• Type: MOSFET
• Max drain–source voltage (V_DS): 60 V
• Max continuous drain current (I_D): 20 A
• Power dissipation (P_D): 28 W
• Max junction temperature (T_J): 175 °C
• Package: TO220FP
• Manufacturer: Commonly produced by STMicroelectronics

Typical applications

With its 60 V drain–source rating the STF20NF06L 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 ±18 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.

Switching behaviour is characterised by an output capacitance (C_oss) of 100 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.

Choosing a replacement for the STF20NF06L

A drop-in substitute for the STF20NF06L should match its polarity and offer a drain–source rating of at least 60 V and a continuous drain current rating of at least 20 A.

Mechanically, check the replacement against the TO220FP 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 STF20NF06L?

The STF20NF06L is a MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 60 V drain-source and 20 A continuous drain current.

What is the maximum voltage of the STF20NF06L?

The STF20NF06L 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 STF20NF06L handle?

It is rated for 20 A of continuous drain current, with power dissipation limited to 28 W. Real-world capability depends on your heatsinking and ambient temperature.

What package does the STF20NF06L come in?

It is listed in TO220FP. Verify the pinout of the specific variant, as one outline can carry different pin assignments.

What can I use to replace the STF20NF06L?

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.