Skip to main content
Log in
STMicroelectronics STP20NM50FP — Discrete Semiconductors

STP20NM50FP N-Channel MOSFET, 550V 20A TO-220FP, Obsolete

MPNSTP20NM50FP
Obsolete

STMicroelectronics MDmesh N-Channel MOSFET, STP20NM50FP, 550 V Vdss, 20 A Id, 250 mOhm Rds(on) at 10 V, TO-220-3 Full Pack, Through Hole, -65°C to 150°C junction.

$6.7200Ref. price · indicative, final on quote
STMicroelectronics STP20NM50FP datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STP20NM50FP specifications
ParameterValue
SeriesMDmesh™
FET typeN-Channel
MountingThrough Hole
Drain to source voltage550 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C20A (Tc)
Power dissipation45W (Tc)
Operating temperature-65°C~150°C(TJ)
PackageTube
Vgs±30V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3 Full Pack
Vgs(th) (Max) @ id5V @ 250µA
Rds on (Max) @ id, vgs250mOhm @ 10A, 10V
Gate charge (Qg) (Max) @ vgs56 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds1480 pF @ 25 V

Product details

The MDmesh family includes several pin-compatible alternatives in the TO-220FP package; a cross-reference search against the base product number STP20N will surface candidates with similar voltage and current ratings.

Gate charge and switching — 56 nC at 10 V

With a maximum gate charge of 56 nC at 10 V, the STP20NM50FP requires a gate driver capable of sourcing and sinking that charge quickly to achieve low switching losses. The input capacitance is 1480 pF at 25 V drain-source. These figures are moderate for a 550 V, 20 A device and are compatible with standard MOSFET gate-drive ICs, but the gate threshold voltage maximum of 5 V at 250 µA means the drive voltage must be at least 10 V to achieve the rated on-resistance.

Heatsinking and airflow are essential for any load above a few amperes.

Frequently asked questions

Is the STP20NM50FP obsolete and what is a replacement?

Yes, the STP20NM50FP is listed as Obsolete. STMicroelectronics no longer produces it. A direct replacement would be another MDmesh N-channel MOSFET in the TO-220FP package with a 550 V or higher drain-source rating and similar current and on-resistance. Search the base product number STP20N for pin-compatible alternatives. For a confirmed cross-reference, contact our sourcing desk with your voltage and current requirements.

Where can I buy STP20NM50FP available via RFQ confirmation today?

The STP20NM50FP is obsolete and not available from the factory, but it can be sourced through independent distribution. Submit an RFQ for current availability and pricing — stock is confirmed at quote time. We source from verified excess inventory channels and can quote on the quantity you need.