Pcb Via Inductance Calculator
Restricted isolated straight via partial inductance estimate2e−7h[ln(4h/d)+1]SI, H, return path mutual inductance excluded, h≥d. Actual matched units/topology and independently established parameters; not a safe device/electrical design or verified manufacturer rating.
Description
An isolated via partial-inductance estimate omits its return-path coupling.
An isolated via partial-inductance estimate omits its return-path coupling.1
This tool evaluates a restricted straight-via approximation in SI units without acting as a complete PCB loop solver.
When to use Pcb Via Inductance Calculator
Use this tool to evaluate a restricted straight-via approximation in SI units without acting as a complete PCB loop solver.
How to use Pcb Via Inductance Calculator and how it works
- Prepare actualViaLengthMeters, actualBarrelDiameterMeters, with the units, conventions and assumptions below.
- Enter the required fields and run Pcb Via Inductance Calculator.
- Read result.value using the output definitions below.
- Correct any rejected inputs and rerun; interpret the result within the stated model and its assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualViaLengthMeters | Actual Via Length Meters. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
| actualBarrelDiameterMeters | Actual Barrel Diameter Meters. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
Supply positive via length and diameter in meters and require length>=diameter. Return 2e-7*length*(ln(4*length/diameter)+1) in henries as the implemented partial-inductance approximation. Return-path geometry and mutual inductance are not included.
inductanceHenries=2e-7*length*(ln(4*length/diameter)+1) Apply the input ordering, units and branch conditions stated above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the calculated or selected fields below. | object |
| result.value | Partial via inductance in henries. | number |
{
"input": {
"actualViaLengthMeters": 1,
"actualBarrelDiameterMeters": 0.1
},
"output": {
"result": {
"value": 9.377758908227871e-07
}
}
}Limitations and assumptions
The calculation uses the supplied observations and model inputs. It does not collect measurements, select a reference population or coefficient, or establish that the model applies to the actual case. The stated branch conditions and output units remain part of the result.
All fields require explicit values. Unexpected fields, wrong types, nonfinite numbers and sparse arrays are rejected. Alignment, bounds and supported-token rules are explained above; extremely large inputs or nonfinite results can also fail. Input errors differ from successful false comparisons, unavailable-domain flags and empty match lists.
Alternative or Complementary methods
Use Pcb Trace Inductance Per Length Calculator for a complementary operation: A trace partial inductance per length depends on a stated isolated long-conductor approximation.
Use Esd Machine Model Current Calculator for a complementary operation: A lossless LC discharge gives an ideal first current peak from charging voltage, capacitance and inductance.
References
-
Pcb Via Inductance Calculator — tool.io
Similar or alternative tools
- Pcb Trace Inductance Per Length Calculator
A trace partial inductance per length depends on a stated isolated long-conductor approximation.
- Esd Machine Model Current Calculator
A lossless LC discharge gives an ideal first current peak from charging voltage, capacitance and inductance.