F5031 MOSFET — Specifications & Equivalents
About the F5031
The F5031 is an N-channel MOSFET with a drain–source voltage (VDS) rating of 40 V, a continuous drain current (ID) of 14 A and an on-resistance (RDS(on)) of 0.07 Ω. It can dissipate up to 20 W and is rated to a junction temperature of 150 °C. It is supplied in the KPACK package.
At a glance
- Type: N-channel MOSFET
- Max drain–source voltage (VDS): 40 V
- Max continuous drain current (ID): 14 A
- On-resistance (RDS(on)): 0.07 Ω
- Power dissipation (PD): 20 W
- Max junction temperature (TJ): 150 °C
- Package: KPACK
Typical applications
With its 40 V drain–source rating the F5031 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.
Choosing a replacement for the F5031
A drop-in substitute for the F5031 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 14 A and an on-resistance no higher than 0.07 Ω if efficiency and heat matter.
Mechanically, check the replacement against the KPACK 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 F5031?
The F5031 is an N-channel MOSFET (metal-oxide-semiconductor field-effect transistor). It is rated for 40 V drain-source and 14 A continuous drain current.
What is the maximum voltage of the F5031?
The F5031 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 F5031 handle?
It is rated for 14 A of continuous drain current, with power dissipation limited to 20 W. Real-world capability depends on your heatsinking and ambient temperature.
What is the on-resistance of the F5031?
On-resistance (Rds(on)) is 0.07 Ω. Multiply by the square of your load current to estimate conduction loss.
What package does the F5031 come in?
It is listed in KPACK. Verify the pinout of the specific variant, as one outline can carry different pin assignments.
What can I use to replace the F5031?
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 |
| Drain Current (Id) | 14 A |
| Drain-Source On-Resistance (Rds) | 0.07 |
| Junction Temperature (Tj) | 150 °C |
| Package | KPACK |
| Power Dissipation (Pd) | 20 W |
Equivalent & Replacement Parts
No verified equivalents are listed for F5031 yet.