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STMicroelectronics STP40NF10L — Discrete Semiconductors

STP40NF10L MOSFET, N-Channel 100V 40A TO-220-3

MPNSTP40NF10L
Active

STMicroelectronics STripFET™ STP40NF10L, N-Channel MOSFET, 100V Vdss, 40A Id, 33mOhm Rds(on) @ 10V, TO-220-3, 175°C Tj max.

$3.0700Ref. price · indicative, final on quote
PackagingTO-220-3
RoHSROHS3 Compliant
SeriesSTripFET™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STP40NF10L specifications
ParameterValue
SeriesSTripFET™
FET typeN-Channel
MountingThrough Hole
Drain to source voltage100 V
Drive voltage (Max rds on, min rds on)5V, 10V
Current - continuous drain (Id) @ 25°C40A (Tc)
Power dissipation150W (Tc)
Operating temperature175°C(TJ)
PackageTube
Vgs±17V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3
Vgs(th) (Max) @ id2.5V @ 250µA
Rds on (Max) @ id, vgs33mOhm @ 20A, 10V
Gate charge (Qg) (Max) @ vgs64 nC @ 5 V
Input capacitance (Ciss) (Max) @ vds2300 pF @ 25 V

Product details

Gate drive and switching — what the numbers mean

The gate charge is specified at 64 nC maximum with a 5 V gate-source swing. That is a moderate charge — a typical gate driver with 1 A peak output can switch this FET in the tens of nanoseconds range. Input capacitance (Ciss) is 2300 pF at 25 V drain-source. This is a moderate value; the switching node capacitance will not dominate the turn-on delay in most hard-switching converters below 200 kHz.

Thermal and package — mounting the TO-220

Maximum power dissipation is 150 W at case temperature, with a maximum junction temperature of 175°C. The TO-220-3 package (also listed as supplier device package TO-220) is a standard through-hole tabbed package — the metal tab is the drain connection and must be electrically isolated or heatsinked accordingly. The 175°C Tj(max) gives headroom for high-current operation with a properly sized heatsink.

It is ROHS3 compliant.

Frequently asked questions

What are the key electrical specifications of STP40NF10L?

Maximum junction temperature is 175°C.

Can STP40NF10L be used as a replacement for IRFZ44N?

The STP40NF10L has a higher voltage rating (100 V vs 55 V) and lower on-resistance (33 mOhm vs 17.5 mOhm typical for IRFZ44N) but similar current rating (40 A vs 49 A). It is not a direct pin-compatible replacement — confirm the gate drive voltage and switching frequency requirements in your circuit before substituting.