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STMicroelectronics STF40NF06 — Discrete Semiconductors

STF40NF06 N-Channel MOSFET, 60 V, 23 A, TO-220FP

MPNSTF40NF06
Obsolete

STMicroelectronics STripFET II STF40NF06, N-Channel MOSFET, 60 V Vdss, 23 A Id, 28 mOhm Rds(on) at 10 V, 32 nC Qg, TO-220FP through-hole package, -55°C to 175°C junction temperature.

$1.4800Ref. price · indicative, final on quote
STMicroelectronics STF40NF06 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STF40NF06 specifications
ParameterValue
SeriesSTripFET™ II
FET typeN-Channel
MountingThrough Hole
Drain to source voltage60 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C23A (Tc)
Power dissipation30W (Tc)
Operating temperature-55°C ~ 175°C (TJ)
PackageTube
Vgs±20V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3 Full Pack
Vgs(th) (Max) @ id4V @ 250µA
Rds on (Max) @ id, vgs28mOhm @ 11.5A, 10V
Gate charge (Qg) (Max) @ vgs32 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds920 pF @ 25 V

Product details

60 V, 23 A N-channel in a TO-220FP — what the ratings mean

The STF40NF06 is a 60 V, 23 A N-channel power MOSFET from ST's STripFET II generation, housed in the TO-220FP full-pack through-hole package.

STMicroelectronics lists the STF40NF06 as Obsolete. The -55°C to 175°C junction range means this part was specified into military-temperature applications; if a drop-in replacement is needed, a parametric search on 60 V Vdss, 23 A Id, and TO-220FP package is the starting point, but no pin-compatible alternate is documented.

With a 32 nC total gate charge at 10 V and 920 pF input capacitance at 25 V drain bias, the STF40NF06 is a medium-speed switch. The 4 V gate threshold at 250 µA gives a comfortable margin for 5 V logic-driven gate drivers, but the 10 V drive voltage for minimum Rds(on) means a bootstrap or dedicated gate-drive rail is needed to hit the 28 mOhm figure. The ±20 V Vgs max leaves headroom for gate ringing in hard-switched topologies.

Frequently asked questions

What is the replacement for STF40NF06?

Buyers need a drop-in or functional replacement because the part is obsolete and still required for repairs or BOM fulfillment.

Is STF40NF06 obsolete?

Engineers and buyers need to confirm life cycle status before designing in or sourcing; obsolete status triggers a search for alternatives.

Where can I buy STF40NF06?

Sourcing buyers need to find distributors that still have stock of this obsolete part.

What are the specifications of STF40NF06?

Design engineers validating fit need pinout, Rds on, voltage/current ratings to ensure compatibility.

What is the cross reference for STF40NF06?

Maintenance techs and brokers often use cross references to find equivalent parts from other manufacturers when the original is obsolete.

Does STF40NF06 have an equivalent in STripFET series?

Buyers looking for a replacement within the same family to minimize redesign effort.