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STMicroelectronics STFI15N95K5 — Discrete Semiconductors

STFI15N95K5 N-Channel MOSFET, 950 V, 7.5 A, MDmesh K5

MPNSTFI15N95K5
Obsolete

STMicroelectronics MDmesh K5 series, N-Channel MOSFET, 950 V drain-source, 7.5 A continuous drain at 25°C, 500 mOhm Rds(on) at 5.5 A, 10 V gate drive, through-hole I2PAKFP (TO-281) package.

$3.3300Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STFI15N95K5 specifications
ParameterValue
SeriesMDmesh™ K5
FET typeN-Channel
MountingThrough Hole
Drain to source voltage950 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C7.5A (Ta)
Power dissipation30W
Operating temperature-55°C ~ 150°C (TJ)
PackageTube
Vgs±30V
TechnologyMOSFET (Metal Oxide)
CaseTO-262-3 Full Pack, I²Pak
Vgs(th) (Max) @ id5V @ 100µA
Rds on (Max) @ id, vgs500mOhm @ 5.5A, 10V
Gate charge (Qg) (Max) @ vgs30 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds855 pF @ 10 V

Product details

950 V N-channel in the I2PAKFP — what the ratings mean

The STFI15N95K5 is an N-channel MOSFET from ST's MDmesh K5 series. Its 950 V drain-source rating (Vdss) suits offline power-conversion applications.

The 7.5 A continuous drain current is specified at 25°C case temperature; above 100°C junction the current must be derated per the datasheet's SOA curve, and the 30 W power dissipation ceiling becomes the binding constraint in a real enclosure.

Gate drive and switching parasitics

Gate charge totals 30 nC at 10 V drive — modest for a 950 V device, which keeps the driver burden low in a 100 kHz hard-switched converter. Input capacitance is 855 pF at 10 V drain bias; the switching speed is set by the gate-drive source impedance and the external gate resistor. The ±30 V Vgs max gives headroom for gate-drive overshoot during fast turn-on edges.

ST lists the STFI15N95K5 as obsolete.

Frequently asked questions

Is STFI15N95K5 obsolete?

Yes, STMicroelectronics lists the STFI15N95K5 as obsolete.