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STMicroelectronics STF26N65DM2 — Discrete Semiconductors

STF26N65DM2 N-Channel MOSFET, 650 V, 20 A, MDmesh DM2

MPNSTF26N65DM2
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STMicroelectronics STF26N65DM2, N-Channel MOSFET, MDmesh™ DM2 series, 650 V Vdss, 20 A continuous drain, 190 mOhm Rds(on) at 10 V, 35.5 nC gate charge, TO-220-3 Full Pack, -55 to 150 °C.

$1.8933Ref. price · indicative, final on quote
STMicroelectronics STF26N65DM2 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STF26N65DM2 specifications
ParameterValue
SeriesMDmesh™ DM2
FET typeN-Channel
MountingThrough Hole
Drain to source voltage650 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C20A (Tc)
Power dissipation30W (Tc)
Operating temperature-55°C ~ 150°C (TJ)
PackageTube
Vgs±25V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3 Full Pack
Vgs(th) (Max) @ id5V @ 250µA
Rds on (Max) @ id, vgs190mOhm @ 10A, 10V
Gate charge (Qg) (Max) @ vgs35.5 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds1480 pF @ 100 V

Product details

650 V, 20 A — the switching-loss anchor for offline power

Gate charge totals 35.5 nC at 10 V — at a 100 kHz switching frequency the gate driver must supply 3.55 mA average, well within the capability of most half-bridge driver ICs.

TO-220FP — isolation without a mounting kit

The TO-220 Full Pack (TO-220FP) moulds the backside tab in epoxy, so the tab is electrically isolated from the drain. Maximum power dissipation is 30 W at case temperature — the full-pack construction limits heat extraction compared to a standard TO-220 with exposed tab. The derating curve from 25 °C to 150 °C junction must be factored into the heatsink design for continuous operation above a few watts.

The base product number is STF26; the full order code resolves to the 650 V, 20 A variant in the TO-220FP package.

Frequently asked questions

What is the difference between STF26N65DM2 and STF26N65M2?

The STF26N65DM2 uses the MDmesh™ DM2 technology, which offers lower gate charge and faster switching compared to the earlier MDmesh™ M2 generation. The DM2 variant is optimised for higher-frequency operation in resonant and hard-switching topologies.

Is STF26N65DM2 RoHS compliant?

The STF26N65DM2 is listed as RoHS compliant per STMicroelectronics' standard environmental compliance for the MDmesh DM2 series in the TO-220FP package.