ELM32418LA MOSFET — Specifications & Equivalents
About the ELM32418LA
The ELM32418LA is an N-channel MOSFET with a drain–source voltage (VDS) rating of 40 V, a continuous drain current (ID) of 20 A and an on-resistance (RDS(on)) of 0.015 Ω. It can dissipate up to 42 W and is rated to a junction temperature of 150 °C. It is supplied in the TO-252 package.
At a glance
- Type: N-channel MOSFET
- Max drain–source voltage (VDS): 40 V
- Max continuous drain current (ID): 20 A
- On-resistance (RDS(on)): 0.015 Ω
- Power dissipation (PD): 42 W
- Max junction temperature (TJ): 150 °C
- Package: TO-252
Typical applications
With its 40 V drain–source rating the ELM32418LA sits in the low-voltage class of switching MOSFETs, typically found in 12 V and 24 V automotive and industrial rails, synchronous buck converters, load switching and reverse-polarity protection and H-bridges for small motors.
The low 0.015 Ω on-resistance keeps conduction loss down, which suits synchronous rectification and continuous high-current paths.
Gate drive and switching notes
Keep gate–source voltage within the ±20 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.
Switching behaviour is characterised by a rise time of 10.8 ns and an output capacitance (Coss) of 255 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.
Choosing a replacement for the ELM32418LA
A drop-in substitute for the ELM32418LA must be the same N-channel type and offer a drain–source rating of at least 40 V, a continuous drain current rating of at least 20 A and an on-resistance no higher than 0.015 Ω if efficiency and heat matter.
Mechanically, check the replacement against the TO-252 footprint and confirm the pin order — parts sharing a package outline do not always share a pinout.
Where the application switches inductive loads or runs near the voltage limit, keep extra headroom rather than choosing a part that only just meets the original numbers.
Frequently asked questions
What is the ELM32418LA?
The ELM32418LA is an N-channel MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 40 V drain-source and 20 A continuous drain current.
What is the maximum voltage of the ELM32418LA?
The ELM32418LA has a maximum drain-source voltage (Vds) of 40 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.
How much current can the ELM32418LA handle?
It is rated for 20 A of continuous drain current, with power dissipation limited to 42 W. Real-world capability depends on your heatsinking and ambient temperature.
What is the on-resistance of the ELM32418LA?
On-resistance (Rds(on)) is 0.015 Ω. Multiply by the square of your load current to estimate conduction loss.
What package does the ELM32418LA come in?
It is listed in TO-252. Verify the pinout of the specific variant, as one outline can carry different pin assignments.
What can I use to replace the ELM32418LA?
No verified equivalents are listed yet. Choose a part of the same polarity that meets or exceeds every rating above and shares a compatible package and pinout.
Key Specifications
| Type | MOSFET |
|---|---|
| Channel Type | N -Channel |
| Drain-Source Voltage (Vds) | 40 V |
| Gate-Source Voltage (Vgs) | 20 V |
| Drain Current (Id) | 20 A |
| Drain-Source On-Resistance (Rds) | 0.015 |
| Rise Time (tr) | 10.8 nS |
| Output Capacitance (Coss) | 255 pF |
| Junction Temperature (Tj) | 150 °C |
| Package | TO-252 |
| Power Dissipation (Pd) | 42 W |
Equivalent & Replacement Parts
No verified equivalents are listed for ELM32418LA yet.