PCB Via Current
Calculate PCB Via Current instantly with the exact formula and a worked example.
PCB Via Current
Finished hole diametermm
Plating thicknessµm
Allowed temperature rise°C
Board thicknessmm
Required currentA
Max current per via
1.9023A
Plating cross-section
0.02553mm²
Via resistance
1.078mΩ
Vias for required current
2
Voltage drop at max current
2.05mV
More about: PCB Via Current
What it calculates
The “PCB Via Current” calculator computes Max current per via in A from 5 parameters: finished hole diameter (mm), plating thickness (µm), allowed temperature rise (°C), board thickness (mm), required current (A).
A standard physics formula used in educational and engineering tasks.
Example calculation
With parameters Finished hole diameter = 0.3 mm, Plating thickness = 25 µm, Allowed temperature rise = 10 °C, Board thickness = 1.6 mm, Required current = 3 A the result is 1.9 A (IPC-2221, external-layer constant; keep a safety margin).
How to use
- Enter finished hole diameter, plating thickness, allowed temperature rise, board thickness and required current — each field above is adjustable with a slider.
- Max current per via (A) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is PCB Via Current calculated?
The PCB Via Current calculator computes Max current per via (in A) from finished hole diameter, plating thickness, allowed temperature rise, board thickness, required current. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the PCB Via Current calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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