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STMicroelectronics STD50N03L — Discrete Semiconductors

STD50N03L N-Channel MOSFET, 30V, 40A, DPAK, Obsolete

MPNSTD50N03L
Obsolete

STMicroelectronics STripFET™ III STD50N03L, N-Channel MOSFET, 30V Vdss, 40A Id, 10.5mOhm Rds(on) @ 20A/10V, DPAK (TO-252-3), -55°C to 175°C.

$0.6200Ref. price · indicative, final on quote
STMicroelectronics STD50N03L datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STD50N03L specifications
ParameterValue
SeriesSTripFET™ III
FET typeN-Channel
MountingSurface Mount
Drain to source voltage30 V
Drive voltage (Max rds on, min rds on)5V, 10V
Current - continuous drain (Id) @ 25°C40A (Tc)
Power dissipation60W (Tc)
Operating temperature-55°C ~ 175°C (TJ)
PackageTape & Reel (TR)
Vgs±20V
TechnologyMOSFET (Metal Oxide)
CaseTO-252-3, DPak (2 Leads + Tab), SC-63
Vgs(th) (Max) @ id1V @ 250µA
Rds on (Max) @ id, vgs10.5mOhm @ 20A, 10V
Gate charge (Qg) (Max) @ vgs14 nC @ 5 V
Input capacitance (Ciss) (Max) @ vds1434 pF @ 25 V

Product details

30V, 40A N-channel in DPAK — what you need to know

The STMicroelectronics STD50N03L is a 30V, 40A N-channel power MOSFET from the STripFET™ III series, housed in a surface-mount DPAK (TO-252-3) package. Its key parametric is a maximum on-resistance of 10.5 mOhm at 20A drain current with a 10V gate drive, which keeps conduction losses low in switching applications like DC-DC converters, load switches, and motor drive bridges.

The STD50N03L is listed as obsolete per the manufacturer's product status.

Drive voltage range is 5V to 10V.

Temperature range and package — deployment context

In practice, continuous operation near 175°C requires careful derating of the 40A current rating — the 40A figure is at 25°C case temperature, and the current must be reduced at higher temperatures per the datasheet's thermal derating curve.

Frequently asked questions

Is STD50N03L obsolete?

Buyers need to know lifecycle status to plan for end-of-life or find alternatives.

What is the replacement for STD50N03L?

Directly answers sourcing and design needs when the original is unavailable.

What are the specifications of STD50N03L?

Engineers need Rds on, Vgs, current rating, etc. for compatibility checks.

Where can I buy STD50N03L?

Buyers and techs need to find stock or distributors for procurement.

What is the pinout of STD50N03L?

Techs replacing a failed unit need correct pin mapping to avoid damage.

Is STD50N03L equivalent to STP50N03L?

Cross-reference queries are common for direct drop-in replacements.