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STMicroelectronics STD50N03L-1 — Discrete Semiconductors

STD50N03L-1 MOSFET, N-Channel 30V 40A, TO-251

MPNSTD50N03L-1
Obsolete

STMicroelectronics STripFET™ III, STD50N03L-1, N-Channel MOSFET, 30 V Vdss, 40 A continuous drain, 10.5 mOhm Rds(on) at 20 A, TO-251-3 (I-PAK) through-hole package.

STMicroelectronics STD50N03L-1 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STD50N03L-1 specifications
ParameterValue
SeriesSTripFET™ III
FET typeN-Channel
MountingThrough Hole
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)
PackageTube
Vgs±20V
TechnologyMOSFET (Metal Oxide)
CaseTO-251-3 Short Leads, IPak, TO-251AA
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

Its 30 V drain-source breakdown (Vdss) gives headroom for a 24 V nominal bus with transients, while the 40 A continuous drain rating at 25 °C case temperature supports moderate-current loads — though you'll derate that figure at elevated ambient.

Gate drive and switching — why the 5 V threshold matters

The STD50N03L-1 specifies a maximum gate threshold of 1 V at 250 µA, which means it turns on hard with logic-level gate drives — 5 V or 10 V are both listed as drive voltages.

It is no longer in production from STMicroelectronics, and no direct successor order code is provided in the record. For new designs, look at current STripFET™ F7 or STripFET™ H7 series N-channel MOSFETs in the same voltage and current class — many are pin-compatible in the I-PAK footprint.

Frequently asked questions

What is the replacement for STD50N03L-1?

For a pin-compatible alternative in the same I-PAK footprint, consider current STripFET™ F7 or H7 series N-channel MOSFETs with similar 30 V Vdss and 40 A current rating — verify the gate charge and Rds(on) against your design.

What is the Rds(on) of STD50N03L-1?

At 5 V gate drive the Rds(on) will be higher — check the typical curve in the datasheet for your operating point.