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STMicroelectronics STF60N55F3 — Discrete Semiconductors

STF60N55F3 N-Channel MOSFET, 55V, 42A, TO-220FP, Obsolete

MPNSTF60N55F3
Obsolete

STMicroelectronics STripFET™ III STF60N55F3 N-Channel MOSFET, 55 V Vdss, 42 A Id, 8.5 mOhm Rds(on) at 32 A, 10 V, TO-220-3 Full Pack, -55°C to 175°C.

STMicroelectronics STF60N55F3 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STF60N55F3 specifications
ParameterValue
SeriesSTripFET™ III
FET typeN-Channel
MountingThrough Hole
Drain to source voltage55 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C42A (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, vgs8.5mOhm @ 32A, 10V
Gate charge (Qg) (Max) @ vgs45 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds2200 pF @ 25 V

Product details

55 V, 42 A N-channel — what the ratings tell you

The STF60N55F3 is an STMicroelectronics STripFET™ III N-channel power MOSFET in a TO-220FP full-pack through-hole package.

Obsolete — secure stock now

STMicroelectronics lists the STF60N55F3 as obsolete.

Sourcing this part for a repair or production run

Because the STF60N55F3 is no longer in production, every unit you buy is from the spot market. Date codes will vary; a reputable broker screens for counterfeit and grades by visual, X-ray, and electrical test. The TO-220FP full-pack package is fully isolated — no exposed metal tab — so the mounting hole is the only thermal path. Plan on a heatsink or forced air if you push past 30 W dissipation, as the package limit is 30 W at case temperature. The tube shipping medium (the package field says Tube) means the parts arrive in anti-static tubes, not tape-and-reel; factor that into your pick-and-place setup if you are hand-loading sockets or a carrier.

Frequently asked questions

Is STF60N55F3 obsolete and what is its lifecycle status?

Yes, the STF60N55F3 is listed as obsolete by STMicroelectronics. For a BOM that already uses this MOSFET, the only procurement path is new-old-stock or surplus inventory through independent distributors.

What is the equivalent or replacement for STF60N55F3?

There is no official pin-compatible replacement listed by STMicroelectronics. A drop-in substitute would need to match the TO-220FP full-pack footprint, 55 V minimum Vdss, 42 A continuous drain current, and 8.5 mOhm or lower Rds(on) at 10 V gate drive. The IRF3205 is a common 55 V N-channel MOSFET but comes in a standard TO-220 with an exposed metal tab — it is not a direct pin-compatible swap because the full-pack package is electrically isolated. A layout change would be required.