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

instrument / verified-clean

# Capacitor Series/Parallel Combiner

The current ledger marks this instrument verified clean within the source-bound verification corpus.

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

## Inspectable records

[01**Overview**Purpose and lifecycle](<https://guthlabs.ai/docs/instruments/capacitor-series-parallel-combiner/>)[02**Mechanism**Method and assumptions](<https://guthlabs.ai/docs/instruments/capacitor-series-parallel-combiner/mechanism/>)[03**Implementation**Binding and validation](<https://guthlabs.ai/docs/instruments/capacitor-series-parallel-combiner/implementation/>)[04**Qualification**Evidence and errata](<https://guthlabs.ai/docs/instruments/capacitor-series-parallel-combiner/qualification/>)

## Ledger state

The current ledger marks this instrument verified clean within the source-bound verification corpus.

**Area**: Electrical & Electronics Engineering — Circuits, Power Systems, Electronics Lab

**Tranche**: tranche-5

**Evidence ID**: t5-119

**Ledger rows**: 1

No ledger note is attached.

## Review findings

Formula verification passes for the two stated pure topologies, but the specification needs review because input units and the exact topology representation are unspecified. The empty honest_label is a concern: the instrument should clearly state that it supports only pure series or pure parallel networks unless mixed series/parallel reduction is implemented.

### Formula and scope findings

- The formulas are standard and correct for a purely parallel network (Cp=ΣCi) or a purely series network (1/Cs=Σ1/Ci). They do not define how arbitrary mixed series/parallel topologies are represented or reduced.

- The series formula requires every capacitor value Ci to be nonzero; for physical capacitors, values should also be strictly positive.

### Unit assumptions

- All capacitor values in a calculation must use one common unit, or the implementation must perform explicit unit conversion before summation or reciprocal calculation.

- The test outputs below are expressed in microfarads unless otherwise stated.

- Capacitance values are ideal lumped capacitances; parasitic effects, voltage dependence, tolerance, and frequency-dependent behavior are not included.

## Boundary hardening

**BREAK_CLAIMED** · SELF_FLAGGED

A zero-valued capacitor in a series network creates a 1/0 undefined term, and omitted units create a convention-dependent result. Inputs should be validated and units made explicit.

## Errata and corrections

No applied erratum is attached to this unique-name record.

## Inspectable example

4 review vectors are recorded. One source-bound sample is shown below.

````
{
  "inputs": {
    "topology": "parallel",
    "capacitors": [
      {
        "value": 10,
        "unit": "uF"
      },
      {
        "value": 22,
        "unit": "uF"
      }
    ]
  },
  "expected_outputs": {
    "Ceq": 32,
    "unit": "uF"
  },
  "working": "Cp = ΣCi = 10 uF + 22 uF = 32 uF."
}
````

## Related workflows

No source-defined multi-instrument workflow membership is recorded.

## Sources and evidence

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

- `VERIFIED_LEDGER.json · VERIFIED_CLEAN`

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

- `BOUNDARY_HAZARD_CATALOG.json`