ELM32420LA MOSFET — Specifications & Equivalents
About the ELM32420LA
The ELM32420LA is an N-channel MOSFET with a drain–source voltage (VDS) rating of 20 V, a continuous drain current (ID) of 45 A and an on-resistance (RDS(on)) of 0.014 Ω. It can dissipate up to 48 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): 20 V
- Max continuous drain current (ID): 45 A
- On-resistance (RDS(on)): 0.014 Ω
- Power dissipation (PD): 48 W
- Max junction temperature (TJ): 150 °C
- Package: TO-252
Typical applications
With its 20 V drain–source rating the ELM32420LA sits in the very-low-voltage class of switching MOSFETs, typically found in battery protection and power-path switching, point-of-load converters and logic-level load switching in portable devices.
The low 0.014 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 ±12 V maximum; exceeding it punctures the gate oxide and destroys the device permanently.
Switching behaviour is characterised by a rise time of 83 ns and an output capacitance (Coss) of 310 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.
Choosing a replacement for the ELM32420LA
A drop-in substitute for the ELM32420LA must be the same N-channel type and offer a drain–source rating of at least 20 V, a continuous drain current rating of at least 45 A and an on-resistance no higher than 0.014 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 ELM32420LA?
The ELM32420LA is an N-channel MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 20 V drain-source and 45 A continuous drain current.
What is the maximum voltage of the ELM32420LA?
The ELM32420LA has a maximum drain-source voltage (Vds) of 20 V. Treat this as an absolute maximum and design with margin, especially when switching inductive loads.
How much current can the ELM32420LA handle?
It is rated for 45 A of continuous drain current, with power dissipation limited to 48 W. Real-world capability depends on your heatsinking and ambient temperature.
What is the on-resistance of the ELM32420LA?
On-resistance (Rds(on)) is 0.014 Ω. Multiply by the square of your load current to estimate conduction loss.
What package does the ELM32420LA 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 ELM32420LA?
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) | 20 V |
| Gate-Source Voltage (Vgs) | 12 V |
| Drain Current (Id) | 45 A |
| Drain-Source On-Resistance (Rds) | 0.014 |
| Rise Time (tr) | 83 nS |
| Output Capacitance (Coss) | 310 pF |
| Junction Temperature (Tj) | 150 °C |
| Package | TO-252 |
| Power Dissipation (Pd) | 48 W |
Equivalent & Replacement Parts
No verified equivalents are listed for ELM32420LA yet.