3482 MOSFET — Specifications & Equivalents
About the 3482
The 3482 is an N-channel MOSFET with a drain–source voltage (VDS) rating of 40 V, a continuous drain current (ID) of 50 A and an on-resistance (RDS(on)) of 0.01 Ω. It can dissipate up to 35 W and is rated to a junction temperature of 175 °C. It is supplied in the PDFN3X3-8L package.
At a glance
- Type: N-channel MOSFET
- Max drain–source voltage (VDS): 40 V
- Max continuous drain current (ID): 50 A
- On-resistance (RDS(on)): 0.01 Ω
- Power dissipation (PD): 35 W
- Max junction temperature (TJ): 175 °C
- Package: PDFN3X3-8L
Typical applications
With its 40 V drain–source rating the 3482 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 50 A current rating puts it in high-current territory, where conduction loss (I² × RDS(on)) and thermal design usually matter more than switching loss. Budget for adequate copper area and a heatsink.
The low 0.01 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 17 ns and an output capacitance (Coss) of 280 pF, which together with the gate drive determines switching loss and the practical upper frequency limit.
Choosing a replacement for the 3482
A drop-in substitute for the 3482 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 50 A and an on-resistance no higher than 0.01 Ω if efficiency and heat matter.
Mechanically, check the replacement against the PDFN3X3-8L 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 3482?
The 3482 is an N-channel MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 40 V drain-source and 50 A continuous drain current.
What is the maximum voltage of the 3482?
The 3482 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 3482 handle?
It is rated for 50 A of continuous drain current, with power dissipation limited to 35 W. Real-world capability depends on your heatsinking and ambient temperature.
What is the on-resistance of the 3482?
On-resistance (Rds(on)) is 0.01 Ω. Multiply by the square of your load current to estimate conduction loss.
What package does the 3482 come in?
It is listed in PDFN3X3-8L. Verify the pinout of the specific variant, as one outline can carry different pin assignments.
What can I use to replace the 3482?
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) | 50 A |
| Drain-Source On-Resistance (Rds) | 0.01 |
| Rise Time (tr) | 17 nS |
| Output Capacitance (Coss) | 280 pF |
| Junction Temperature (Tj) | 175 °C |
| Package | PDFN3X3-8L |
| Power Dissipation (Pd) | 35 W |
Equivalent & Replacement Parts
No verified equivalents are listed for 3482 yet.