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STMicroelectronics STP6NK90ZFP — Discrete Semiconductors

STP6NK90ZFP N-Channel MOSFET, 900 V, 5.8 A, TO-220FP

MPNSTP6NK90ZFP
Active

STMicroelectronics STP6NK90ZFP, N-Channel MOSFET, SuperMESH series, 900 V Vdss, 5.8 A Id, 2 Ohm Rds(on) at 10 V, TO-220-3 Full Pack, -55 to 150 °C.

$3.2300Ref. price · indicative, final on quote
PackagingTO-220-3 Full Pack
RoHSROHS3 Compliant
SeriesSuperMESH™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STP6NK90ZFP specifications
ParameterValue
SeriesSuperMESH™
FET typeN-Channel
MountingThrough Hole
Drain to source voltage900 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C5.8A (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, vgs2Ohm @ 2.9A, 10V
Gate charge (Qg) (Max) @ vgs60.5 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds1350 pF @ 25 V

Product details

At that operating point conduction loss is I²R = 16.8 W, which sits inside the 30 W package power limit but leaves only 13.2 W headroom for switching losses. The 60.5 nC total gate charge at 10 V means the gate driver needs to source about 60 nC per switching cycle; at 100 kHz that's 6 mA average drive current, well within a standard MOSFET driver's capability.

Thermal and package — rework and mounting notes

The TO-220FP full-pack body has no exposed metal tab — the plastic encapsulant is the thermal interface. Rated power dissipation is 30 W at case temperature, and the operating junction range is -55 to 150 °C. Through-hole mounting with the package screw hole lets you torque it to a heatsink with a standard M3 screw. The isolated package means no mica or sil-pad, which cuts assembly time and eliminates one failure point under thermal cycling.

Frequently asked questions

Does STP6NK90ZFP require a heatsink?

At the rated 5.8 A continuous drain current and 2 Ohm Rds(on), conduction losses alone reach 16.8 W, which exceeds the free-air dissipation capability of the TO-220FP package. A heatsink is required for any continuous operation above a few watts. The isolated full-pack package bolts directly to a heatsink without an insulator.

What is the exact replacement for STP6NK90ZFP?

No official replacement or successor part is listed by STMicroelectronics for the STP6NK90ZFP. The base product number STP6NK90 includes the standard TO-220 variant (STP6NK90Z) and the full-pack variant (STP6NK90ZFP). If you need a pin-compatible alternative, the STP6NK90Z (non-isolated TO-220) shares the same die but requires an insulator for heatsink mounting.

Is STP6NK90ZFP RoHS compliant?

Yes, the STP6NK90ZFP is ROHS3 compliant, meeting the EU Restriction of Hazardous Substances directive without exemptions.