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STMicroelectronics STFW6N120K3 — Discrete Semiconductors

STFW6N120K3 SuperMESH3 N-Channel MOSFET, 1200 V, 6 A

MPNSTFW6N120K3
Obsolete

STMicroelectronics STFW6N120K3 SuperMESH3 N-channel MOSFET, 1200 V drain-source, 6 A continuous drain, 2.4 Ohm Rds(on) at 2.5 A, 10 V, 34 nC gate charge, TO-3PF full-pack through-hole, -55 to 150 °C.

$12.0900Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STFW6N120K3 specifications
ParameterValue
SeriesSuperMESH3™
FET typeN-Channel
MountingThrough Hole
Drain to source voltage1200 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C6A (Tc)
Power dissipation63W (Tc)
Operating temperature-55°C ~ 150°C (TJ)
PackageTube
Vgs±30V
TechnologyMOSFET (Metal Oxide)
CaseTO-3P-3 Full Pack
Vgs(th) (Max) @ id5V @ 100µA
Rds on (Max) @ id, vgs2.4Ohm @ 2.5A, 10V
Gate charge (Qg) (Max) @ vgs34 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds1050 pF @ 100 V

Product details

1200 V, 6 A N-channel — what it handles

The STFW6N120K3: Rated 1200 V drain-source, 6 A continuous drain, 2.4 Ohm Rds(on) at 2.5 A, 10 V.

Gate charge and drive budget

Total gate charge is 34 nC at 10 V. Input capacitance is 1050 pF at 100 V drain-source.

STMicroelectronics lists the STFW6N120K3 as obsolete. Any stock offered should be verified against the original date code and ST's last-time-buy window to avoid counterfeits.

TO-3PF full-pack — isolated mounting

Frequently asked questions

Is the STFW6N120K3 obsolete?

Yes, STMicroelectronics lists the STFW6N120K3 as obsolete. Any replacement must be evaluated for pin-compatibility and parametric fit — no direct drop-in is documented by ST.