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STMicroelectronics STD9N80K5 — Discrete Semiconductors

STD9N80K5 N-Channel MOSFET, 800 V, 7 A, MDmesh K5

MPNSTD9N80K5
Active

STMicroelectronics MDmesh™ K5 series N-Channel MOSFET, STD9N80K5, 800 V Vdss, 7 A continuous drain, 900 mOhm Rds(on) at 10 V gate drive, DPAK (TO-252) surface-mount package.

$1.1959Ref. price · indicative, final on quote
STMicroelectronics STD9N80K5 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STD9N80K5 specifications
ParameterValue
SeriesMDmesh™ K5
FET typeN-Channel
MountingSurface Mount
Drain to source voltage800 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C7A (Tc)
Power dissipation110W (Tc)
Operating temperature-55°C ~ 150°C (TJ)
PackageTape & Reel (TR)
Vgs±30V
TechnologyMOSFET (Metal Oxide)
CaseTO-252-3, DPak (2 Leads + Tab), SC-63
Vgs(th) (Max) @ id5V @ 100µA
Rds on (Max) @ id, vgs900mOhm @ 3.5A, 10V
Gate charge (Qg) (Max) @ vgs12 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds340 pF @ 100 V

Product details

The STD9N80K5 is an 800 V N-channel MOSFET from STMicroelectronics' MDmesh™ K5 series, built for high-voltage switching in a compact DPAK (TO-252) surface-mount package.

Thermal and switching — sizing the heatsink and the driver

Gate charge is 12 nC at 10 V. Input capacitance is 340 pF at 100 V drain-source.

Temperature range and gate drive

Gate threshold voltage is 5 V maximum at 100 µA drain current, so the 10 V drive recommended for minimum Rds(on) is well above the threshold — no risk of operating in the linear region at turn-on. Maximum gate-source voltage is ±30 V, giving margin against ringing on the gate node in a hard-switched topology.

Frequently asked questions

What is the Rds(on) of STD9N80K5?

This is the conduction-loss spec to use for thermal calculations at the nominal operating point.

What is the replacement for STD9N80K5?

The part is active, so a replacement is not needed for current production. If you need a cross-reference, the MDmesh K5 series includes other voltage and current variants, but pin-compatibility depends on the specific package and footprint.