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STMicroelectronics STP40NF03L — Discrete Semiconductors

STP40NF03L MOSFET, N-Channel 30V 40A TO-220, NRND

MPNSTP40NF03L
NRND

STMicroelectronics STripFET™ STP40NF03L, N-Channel MOSFET, 30 V Vdss, 40 A Id, 22 mOhm Rds(on) at 20 A, 10 V, TO-220-3, -55°C to 175°C.

$1.0800Ref. price · indicative, final on quote
STMicroelectronics STP40NF03L datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STP40NF03L specifications
ParameterValue
SeriesSTripFET™
FET typeN-Channel
MountingThrough Hole
Drain to source voltage30 V
Drive voltage (Max rds on, min rds on)4.5V, 10V
Current - continuous drain (Id) @ 25°C40A (Tc)
Power dissipation70W (Tc)
Operating temperature-55°C~175°C(TJ)
PackageTube
Vgs±16V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3
Vgs(th) (Max) @ id2.5V @ 250µA
Rds on (Max) @ id, vgs22mOhm @ 20A, 10V
Gate charge (Qg) (Max) @ vgs15 nC @ 4.5 V
Input capacitance (Ciss) (Max) @ vds770 pF @ 25 V

Product details

The STMicroelectronics STP40NF03L is a 30 V, 40 A N-channel power MOSFET built on the STripFET™ process, in a through-hole TO-220 package. The 15 nC gate charge at 4.5 V means the driver doesn't need to source much current for fast transitions, which helps keep the gate-drive stage small.

That means ST has flagged this part for eventual end-of-life — no new production designs should use it, and existing BOMs need a qualified replacement identified before the last-time-buy window closes.

Temperature range and package — board-fit considerations

The TO-220 package with a through-hole mount is straightforward to heatsink; the 70 W power dissipation rating at the case assumes a proper thermal interface.

Frequently asked questions

Is the STP40NF03L obsolete?

ST is not actively promoting it for new designs, but it remains available through independent distribution for existing BOMs. Plan a replacement before a last-time-buy notice appears.

What is the STP40NF03L equivalent or replacement in TO-220?

The STripFET™ family includes several active parts that may fit, but verify the gate threshold and switching performance against your application.

What is the Rds(on) of the STP40NF03L?

At 4.5 V drive the on-resistance will be higher — the datasheet specifies drive voltage for max Rds(on) as 4.5 V and 10 V, so expect a trade-off if you are running from a 5 V logic rail.