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STMicroelectronics STD9N40M2 — Discrete Semiconductors

STD9N40M2 N-Channel MOSFET, 400 V, 6 A, DPAK

MPNSTD9N40M2
Active

STMicroelectronics MDmesh™ II Plus series, N-Channel MOSFET, 400 V drain-source, 6 A continuous drain, 800 mOhm Rds(on) at 10 V gate drive, 8.8 nC gate charge, DPAK surface-mount package, -55°C to 150°C junction temperature.

$1.1100Ref. price · indicative, final on quote
PackagingTO-252-3, DPak (2 Leads + Tab), SC-63
RoHSROHS3 Compliant
SeriesMDmesh™ II Plus
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STD9N40M2 specifications
ParameterValue
SeriesMDmesh™ II Plus
FET typeN-Channel
MountingSurface Mount
Drain to source voltage400 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C6A (Tc)
Power dissipation60W (Tc)
Operating temperature-55°C ~ 150°C (TJ)
PackageTape & Reel (TR) Cut Tape (CT)
Vgs±25V
TechnologyMOSFET (Metal Oxide)
CaseTO-252-3, DPak (2 Leads + Tab), SC-63
Vgs(th) (Max) @ id4V @ 250µA
Rds on (Max) @ id, vgs800mOhm @ 3A, 10V
Gate charge (Qg) (Max) @ vgs8.8 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds270 pF @ 100 V

Product details

400 V, 6 A switching MOSFET in DPAK

The STD9N40M2 is housed in a DPAK (TO-252-3) surface-mount package.

800 mOhm Rds(on) and low gate charge

The total gate charge is 8.8 nC at 10 V. Input capacitance is 270 pF at 100 V Vds, contributing to a low Miller plateau charge that aids fast turn-on and turn-off transitions in flyback and PFC stages.

Active production, full temperature range

Frequently asked questions

Where can I buy STD9N40M2?

Buyers need to find a reliable distributor and check availability.

What is the price of STD9N40M2 in single quantity?

Price drives purchasing decisions and budget planning.

Is STD9N40M2 in stock at major distributors?

Stock availability affects lead time and production schedules.

What are the key specifications of STD9N40M2?

Engineers verify fit by checking voltage, current, and Rds(on).

What is the equivalent of STD9N40M2?

Designers and buyers need alternatives for sourcing flexibility.

Can I use STD9N40M2 as a replacement for IRF840?

Common cross-reference to ensure compatibility in existing designs.