Source: https://guthlabs.ai/docs/instruments/inductor-series-parallel-combiner/mechanism/

instrument mechanism / verified-clean

# Inductor Series/Parallel Combiner mechanism

The inspectable method record for Inductor Series/Parallel Combiner, kept separate from implementation and qualification.

Status: **VERIFIED_CLEAN**Lifecycle: **verified-clean**

## Model scope

The stated series and parallel formulas are standard for ideal uncoupled inductors. The honest label correctly identifies the no-mutual-coupling assumption. Verdict is NEEDS_REVIEW because input units and mixed-unit behavior are unspecified, and valid-input constraints are not documented.

No additional formula finding is recorded.

## Units and conventions

- All inductance values must use a common unit before applying either formula; the specification does not define an input-unit convention or mixed-unit handling.

- The formulas assume ideal, uncoupled inductors with linear, frequency-independent inductance values.

- For parallel combinations, each inductance must be nonzero; practical inductors also require compatible connection polarity and negligible parasitic effects.

## Inspectable vector

One of 4 source-bound review vectors:

````
{
  "inputs": {
    "topology": "series",
    "inductors": [
      {
        "value": 10,
        "unit": "uH"
      },
      {
        "value": 22,
        "unit": "uH"
      },
      {
        "value": 47,
        "unit": "uH"
      }
    ]
  },
  "expected_outputs": {
    "Leq": 79,
    "unit": "uH"
  },
  "working": "Ls = ΣLi = 10 uH + 22 uH + 47 uH = 32 uH + 47 uH = 79 uH."
}
````

## Failure boundary

**BREAK_CLAIMED** · SELF_FLAGGED

A parallel input containing a zero-valued inductor causes division by zero and must be rejected. Additionally, the input specification does not define a unit convention, so bare values can produce results differing by a factor of 1000 between mH and H.

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/inductor-series-parallel-combiner/>)[03**Implementation**](<https://guthlabs.ai/docs/instruments/inductor-series-parallel-combiner/implementation/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/inductor-series-parallel-combiner/qualification/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `evidence-tranche5/tranche5-results.json`

- `BOUNDARY_HAZARD_CATALOG.json`