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STMicroelectronics STD40N2LH5 — Discrete Semiconductors

STD40N2LH5 N-Channel MOSFET, 25V 40A 11.8mΩ DPAK

MPNSTD40N2LH5
Obsolete

STMicroelectronics STD40N2LH5, STripFET™ V, N-Channel MOSFET, 25V Vdss, 40A Id, 11.8mOhm Rds(on) at 20A, DPAK (TO-252-3).

STMicroelectronics STD40N2LH5 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STD40N2LH5 specifications
ParameterValue
SeriesSTripFET™ V
FET typeN-Channel
MountingSurface Mount
Drain to source voltage25 V
Drive voltage (Max rds on, min rds on)5V, 10V
Current - continuous drain (Id) @ 25°C40A (Tc)
Power dissipation35W (Tc)
Operating temperature-55°C~175°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
Vgs±22V
TechnologyMOSFET (Metal Oxide)
CaseTO-252-3, DPak (2 Leads + Tab), SC-63
Vgs(th) (Max) @ id1V @ 250µA
Rds on (Max) @ id, vgs11.8mOhm @ 20A, 10V
Gate charge (Qg) (Max) @ vgs6.3 nC @ 5 V
Input capacitance (Ciss) (Max) @ vds700 pF @ 20 V

Product details

STD40N2LH5 — 25 V N-channel in DPAK, now obsolete

The STD40N2LH5 is an STMicroelectronics STripFET™ V N-channel MOSFET in a DPAK (TO-252-3) surface-mount package. Gate charge is just 6.3 nC at 5 V, so a modest driver can hit fast edges. The 25 V drain-to-source rating suits 12 V and low-voltage 24 V rails where headroom is tight.

Obsolete — sourcing via independent distribution

STMicroelectronics has marked the STD40N2LH5 obsolete.

At 20 A the max on-resistance is 11.8 mΩ with 10 V gate drive. The threshold voltage maxes at 1 V at 250 µA, so the device turns on cleanly with logic-level drive down to 5 V. Minimum Rds(on) is specified at 5 V drive as well, giving flexibility in gate-drive design.

Housed in the TO-252-3 (DPAK) with the tab as the drain connection. Maximum power dissipation is 35 W at case temperature, which demands a solid thermal interface — via stitching under the tab and a reasonable copper area on the board.

Frequently asked questions

Is STD40N2LH5 obsolete?

Yes, STMicroelectronics has marked the STD40N2LH5 obsolete.

What is the Rds(on) of STD40N2LH5?

Maximum on-resistance is 11.8 mΩ at 20 A drain current with 10 V gate drive.

What is the Vgs threshold of STD40N2LH5?

Maximum gate threshold voltage is 1 V at 250 µA drain current.