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STMicroelectronics STD7NM50N — Discrete Semiconductors

STD7NM50N N-Channel MOSFET, 500 V, 5 A, DPAK

MPNSTD7NM50N
Obsolete

STMicroelectronics MDmesh™ II N-Channel MOSFET, STD7NM50N, 500 V drain-source, 5 A continuous drain at 25°C, 780 mOhm Rds(on) at 10 V gate drive, DPAK (TO-252) surface-mount package.

$0.8893Ref. price · indicative, final on quote
STMicroelectronics STD7NM50N datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STD7NM50N specifications
ParameterValue
SeriesMDmesh™ II
FET typeN-Channel
MountingSurface Mount
Drain to source voltage500 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C5A (Tc)
Power dissipation45W (Tc)
Operating temperature-55°C ~ 150°C (TJ)
PackageTape & Reel (TR)
Vgs±25V
TechnologyMOSFET (Metal Oxide)
CaseTO-252-3, DPak (2 Leads + Tab), SC-63
Vgs(th) (Max) @ id4V @ 250µA
Rds on (Max) @ id, vgs780mOhm @ 2.5A, 10V
Gate charge (Qg) (Max) @ vgs12 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds400 pF @ 50 V

Product details

500 V, 5 A, 780 mOhm — the switching spec

The 500 V drain-source breakdown voltage suits offline flyback converters, auxiliary power supplies, and LED lighting drivers where the DC bus sits at 300–400 V. Input capacitance is 400 pF at 50 V drain-source, so the driver doesn't need to be a high-current type. The 45 W power dissipation limit at the case is the thermal ceiling — derate for ambient temperature above 25°C.

DPAK footprint and temperature range

The tab is the drain, so the PCB copper area acts as the heatsink — a 1-inch-square pad on a 2-oz copper board can dissipate roughly 1.5–2 W before the junction hits 100°C.

Frequently asked questions

Where can I buy STD7NM50N and is it available via RFQ confirmation?

Since the STD7NM50N is obsolete, it is not available through franchised distributors. It can be sourced through independent distribution channels. Submit an RFQ through this listing to check current supply and price.

What is the replacement for STD7NM50N?

STMicroelectronics has not published an official successor for the STD7NM50N. For a new design, look at current MDmesh™ series parts with similar voltage and current ratings, such as the STD7NM50N's MDmesh™ II family siblings, but verify pin compatibility and thermal performance. For an existing BOM, a parametric search for 500 V, 5 A, DPAK N-channel MOSFETs from other manufacturers may yield a drop-in alternative, but each candidate must be validated for gate drive voltage and switching losses.