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STMicroelectronics STP4N90K5 — Discrete Semiconductors

STP4N90K5 MOSFET, 900 V, 3 A, N-Channel, TO-220-3

MPNSTP4N90K5
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STMicroelectronics STP4N90K5, MDmesh™ K5 series, N-Channel MOSFET, 900 V Vdss, 3 A Id, 2.1 Ohm Rds(on), TO-220-3 through-hole package.

$2.1200Ref. price · indicative, final on quote
STMicroelectronics STP4N90K5 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STP4N90K5 specifications
ParameterValue
SeriesMDmesh™ K5
FET typeN-Channel
MountingThrough Hole
Drain to source voltage900 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C3A (Tc)
Power dissipation60W (Tc)
Operating temperature-55°C ~ 150°C (TJ)
PackageTube
Vgs±30V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3
Vgs(th) (Max) @ id5V @ 100µA
Rds on (Max) @ id, vgs2.1Ohm @ 1A, 10V
Gate charge (Qg) (Max) @ vgs5.3 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds173 pF @ 100 V

Product details

900 V N-channel MOSFET for high-voltage switching

It comes in a TO-220-3 through-hole package, making it a straightforward fit for offline power supplies, flyback converters, PFC stages, and auxiliary bias supplies where high-voltage capability and moderate current handling are needed.

2.1 Ohm Rds(on) and 5.3 nC Qg — conduction and switching trade-off

The input capacitance of 173 pF at 100 V drain-source confirms fast switching with minimal drive current.

Temperature range and package — through-hole for rework-friendly assembly

For a rework tech, the three-lead TO-220 is easy to remove and replace with a soldering iron or hot-air station; the tab provides a clear orientation mark (tab is drain), and the leads are robust enough to survive a couple of rework cycles without lifting a pad.

Frequently asked questions

Can STP4N90K5 replace STP4N90K3?

The STP4N90K5 is from the same MDmesh K5 family as the STP4N90K3, but the evidence does not confirm pin-compatibility or identical ratings. Check the respective datasheets for Rds(on), gate charge, and switching characteristics to verify fit for your design.

Is STP4N90K5 RoHS compliant?

The STP4N90K5 is a lead-free device in a TO-220-3 package, consistent with RoHS requirements. The evidence does not list a specific RoHS certificate, but ST's MDmesh K5 series is generally RoHS-compliant.