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STMicroelectronics STP6N90K5 — Discrete Semiconductors

STP6N90K5 MOSFET N-CH 900V 6A TO-220, MDmesh K5

MPNSTP6N90K5
Active

STMicroelectronics STP6N90K5, MDmesh™ K5 series, N-Channel MOSFET, 900V Vdss, 6A Id, 1.1 Ohm Rds(on) @ 3A, 10V, TO-220-3 through-hole, -55°C to 150°C junction.

$2.2600Ref. price · indicative, final on quote
STMicroelectronics STP6N90K5 datasheet (PDF)
PackagingTO-220-3
RoHSROHS3 Compliant
SeriesMDmesh™ K5
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STP6N90K5 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°C6A (Tc)
Power dissipation110W (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, vgs1.1Ohm @ 3A, 10V

Product details

900 V, 6 A — the offline power switch

This voltage class targets the primary-side switching element in offline flyback converters, PFC boost stages, and auxiliary power supplies for industrial and telecom equipment where the DC bus sits at 400 V or higher.

1.1 Ohm Rds(on) — conduction loss budget

At 3 A RMS in a flyback primary, the conduction loss is roughly 10 W, which the 110 W power dissipation rating can handle with an adequate heatsink.

Junction temperature range and mounting

It is ROHS3 compliant.

Frequently asked questions

What is the Rds(on) of STP6N90K5?

This value is specified at 25°C junction temperature; expect the on-resistance to increase with temperature per the typical curve in the datasheet.

Is STP6N90K5 RoHS compliant?

Yes, the STP6N90K5 is ROHS3 compliant.