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STMicroelectronics STP11NK50ZFP — Discrete Semiconductors

STP11NK50ZFP N-Channel MOSFET, 500 V, 10 A, TO-220FP, NRND

MPNSTP11NK50ZFP
NRND

STMicroelectronics SuperMESH™ series, STP11NK50ZFP, N-Channel MOSFET, 500 V Vdss, 10 A Id, 520 mOhm Rds(on) at 10 V, TO-220 Full Pack (TO-220FP), -55°C to 150°C junction temperature.

$2.9200Ref. price · indicative, final on quote
STMicroelectronics STP11NK50ZFP datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STP11NK50ZFP specifications
ParameterValue
SeriesSuperMESH™
FET typeN-Channel
MountingThrough Hole
Drain to source voltage500 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C10A (Tc)
Power dissipation30W (Tc)
Operating temperature-55°C ~ 150°C (TJ)
PackageTube
Vgs±30V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3 Full Pack
Vgs(th) (Max) @ id4.5V @ 100µA
Rds on (Max) @ id, vgs520mOhm @ 4.5A, 10V
Gate charge (Qg) (Max) @ vgs68 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds1390 pF @ 25 V

Product details

500 V N-channel MOSFET — the TO-220FP advantage

NRND — plan your last-time-buy now

STMicroelectronics lists the STP11NK50ZFP as Not Recommended for New Designs (NRND).

Gate charge and switching — 68 nC at 10 V

This is typical for a 500 V, 10 A planar MOSFET — the driver must supply that charge each switching cycle, so the gate drive source and sink current, plus the switching frequency, set the actual gate-drive power loss.

Temperature range and thermal limits

Maximum power dissipation is 30 W at case temperature, which means the TO-220FP's thermal resistance to the heatsink must be managed — the isolated tab helps, but the package still needs a good thermal interface and adequate heatsink area for continuous operation near the current limit.

Frequently asked questions

Is STP11NK50ZFP obsolete or NRND?

It is not yet discontinued, but new designs should not use it. For existing production, plan a last-time-buy or qualify a replacement.

What is the Rds(on) of STP11NK50ZFP?

The maximum on-resistance is 520 mOhm at 4.5 A drain current and 10 V gate-source voltage.

Can I use STP11NK50ZFP in a 400V application?

Yes. The drain-source voltage rating is 500 V, which provides adequate margin for a 400 V DC bus in PFC stages or flyback converters, assuming proper derating and snubbing.

What is the Vgs(th) of STP11NK50ZFP?

The maximum gate threshold voltage is 4.5 V at 100 µA drain current.