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STMicroelectronics STF18N65M5 — Discrete Semiconductors

STF18N65M5 N-Channel MOSFET, 650 V, 15 A, TO-220FP

MPNSTF18N65M5
Obsolete

STMicroelectronics MDmesh™ V series, N-Channel MOSFET, 650 V drain-source, 15 A continuous drain, 220 mOhm Rds(on) at 7.5 A, 10 V, through-hole TO-220-3 Full Pack.

$2.7800Ref. price · indicative, final on quote
STMicroelectronics STF18N65M5 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STF18N65M5 specifications
ParameterValue
SeriesMDmesh™ V
FET typeN-Channel
MountingThrough Hole
Drain to source voltage650 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C15A (Tc)
Power dissipation25W (Tc)
Operating temperature150°C(TJ)
PackageTube
Vgs±25V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3 Full Pack
Vgs(th) (Max) @ id5V @ 250µA
Rds on (Max) @ id, vgs220mOhm @ 7.5A, 10V
Gate charge (Qg) (Max) @ vgs31 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds1240 pF @ 100 V

Product details

The STF18N65M5: 650 V drain-source, 15 A continuous drain, 220 mOhm Rds(on) at 7.5 A, 10 V.

STMicroelectronics no longer manufactures this MDmesh V generation MOSFET in the TO-220FP package. New designs should not target this order code. For existing production, the only channel is the independent surplus market — traceable, tested stock sourced against an RFQ. No official ST successor has been published for this specific device; a functional replacement within the same voltage and current class would be a current-generation MDmesh part such as a comparable 650 V, 15 A N-channel MOSFET, but pin-for-pin compatibility and gate-drive requirements must be verified against the original PCB layout and thermal budget.

Package and thermal — the TO-220FP constraint

The TO-220 Full Pack (TO-220FP) is a fully isolated through-hole package with the metal tab encapsulated — no heatsink pad exposed, no electrical connection to the drain tab. For any design pulling more than a few amps average, a heatsink is mandatory, and the junction temperature must stay under 150°C. The mounting hole fits an M3 screw through the tab, but the plastic body means the heatsink interface relies on thermal grease or a pad across the full back surface.

Frequently asked questions

Is the STF18N65M5 obsolete?

Yes, the STF18N65M5 carries an Obsolete product status. STMicroelectronics has discontinued this MDmesh V generation part in the TO-220FP package.

What is the difference between STF18N65M5 and STF18N65M2?

Both are 650 V, 15 A N-channel MOSFETs in the TO-220FP package from ST's MDmesh family. The STF18N65M5 is from the MDmesh V generation; the STF18N65M2 is from the MDmesh II generation. The M5 typically offers lower Rds(on) and gate charge, but the exact parametric differences — and whether either is still active — must be checked against current datasheets. The M2 may still be in production; the M5 is obsolete.