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STMicroelectronics STP5NK50ZFP — Discrete Semiconductors

STP5NK50ZFP N-Channel MOSFET, 500V, 1.5 Ohm, TO-220FP

MPNSTP5NK50ZFP
NRND

STMicroelectronics SuperMESH™ N-channel MOSFET, 500V Vdss, 4.4A Id, 1.5 Ohm Rds(on) @ 10V, TO-220-3 Full Pack (TO-220FP), -55 to 150°C junction temperature.

$1.8900Ref. price · indicative, final on quote
STMicroelectronics STP5NK50ZFP datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STP5NK50ZFP 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°C4.4A (Tc)
Power dissipation70W (Tc)
Operating temperature-55°C ~ 150°C (TJ)
PackageTube
Vgs±30V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3 Full Pack
Vgs(th) (Max) @ id4.5V @ 50µA
Rds on (Max) @ id, vgs1.5Ohm @ 2.2A, 10V
Gate charge (Qg) (Max) @ vgs28 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds535 pF @ 25 V

Product details

The STP5NK50ZFP: The TO-220FP full-pack package has an isolated tab — no insulating pad or washer needed between the metal back and the heatsink.

STMicroelectronics lists the STP5NK50ZFP as NRND (Not Recommended for New Design). No last-time-buy date is published in the current record. For an existing production BOM, the NRND status means you have time to qualify a replacement, but you should not start a new design with this order code.

The TO-220FP package dissipates up to 70 W at the case, but the isolated tab means the thermal resistance from junction to case is higher than a standard TO-220 — account for that when sizing the heatsink at high ambient temperatures.

Frequently asked questions

Is STP5NK50ZFP obsolete or NRND?

It is NRND (Not Recommended for New Design). The manufacturer continues to supply it for existing designs, but new projects should select a pin-compatible alternative from the same SuperMESH family before the part moves to full end-of-life.

What is the Rds(on) of STP5NK50ZFP?

Maximum on-resistance is 1.5 Ohm at 2.2 A drain current with 10 V gate drive.

What is the replacement for STP5NK50ZFP?

For a pin-compatible drop-in with similar ratings, look at other ST SuperMESH N-channel MOSFETs in the TO-220FP package with 500 V Vdss and comparable Rds(on) — cross-reference the gate charge and input capacitance to match your switching performance.