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STMicroelectronics STF4LN80K5 — Discrete Semiconductors

STF4LN80K5 N-Channel MOSFET, 800 V, 3 A, MDmesh K5

MPNSTF4LN80K5
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STMicroelectronics STF4LN80K5, N-channel MOSFET, MDmesh K5 series, 800 V Vdss, 3 A Id, 2.6 Ohm Rds(on) at 1 A, 10 V, 3.7 nC gate charge, TO-220FP through-hole package, -55 to 150 °C junction.

$1.6300Ref. price · indicative, final on quote
STMicroelectronics STF4LN80K5 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STF4LN80K5 specifications
ParameterValue
SeriesMDmesh™ K5
FET typeN-Channel
MountingThrough Hole
Drain to source voltage800 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C3A (Tc)
Power dissipation20W (Tc)
Operating temperature-55°C~150°C(TJ)
PackageTube
Vgs±30V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3 Full Pack
Vgs(th) (Max) @ id5V @ 100µA
Rds on (Max) @ id, vgs2.6Ohm @ 1A, 10V
Gate charge (Qg) (Max) @ vgs3.7 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds122 pF @ 100 V

Product details

800 V N-channel MOSFET — MDmesh K5 series

The STF4LN80K5: It is built on ST's MDmesh vertical structure, which reduces on-resistance per unit area compared to planar MOSFETs of the same voltage class. The device targets offline flyback converters, auxiliary power supplies, and LED drivers where low gate charge and fast switching are needed.

Conduction and switching parametrics

Gate charge totals 3.7 nC at 10 V, and input capacitance is 122 pF at 100 V drain-source — both low enough that a simple gate-drive IC or even a logic-level output can switch the device at moderate frequencies without excessive drive loss. Gate threshold voltage is specified at 5 V maximum with 100 µA drain current, so the device needs a gate drive above 5 V to fully enhance; the recommended drive voltage is 10 V for the rated Rds(on).

Through-hole mounting (TO-220) suits point-to-point wiring on perfboard or PCB through-hole layouts.

Frequently asked questions

Where can I buy STF4LN80K5?

Submit an RFQ for current availability and pricing — no stock-holding claim is made here.

What is the Vgs(th) of STF4LN80K5?

Maximum gate threshold voltage is 5 V at 100 µA drain current. The device requires a gate drive above 5 V to fully turn on; 10 V is the recommended drive for the rated on-resistance.