Public evidence

electrical.pcb.via_current

Machine-checked verification for calculation version 1.0.0 · tier internally_reviewed

Open calculator API Capability Download JSON CVP Manifest MCP Review policy

CVP status

SI metres for drill/plating; ampacity via mil²

Declared partition coverage: PASS · 3/3 declared partitions (current, drill, invalid-domain)
Versions: Calculation 1.0.0 · CVP protocol 1.0.0-proposed · Evidence 2026-10-28.meta-metrics-v2
Verification revision: 2026-10-28.meta-metrics-v2 · 3/3 property · digest 3b045b0564b2

Verification

Legacy regression suite: 7/7 calculation tests · Production surface contract 6/6

Three distinct suites: educational examples on the calculator page, this legacy regression count (7/7 golden + boundary), and the CVP verification suite below. They are not the same number. Property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the CVP Manifest . SKIP (0/0) means that suite has no published vectors.

This calculator CURRENT · Public schema 1.0.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Verification revision 2026-10-28.meta-metrics-v2. Calculation version 1.0.0. CVP 1.0.0-proposed. 2/2 golden · 2/2 CVP boundary · 2/2 invalid · 3/3 property · 2/2 metamorphic · 1/1 cross-interface · 6/6 CVP contract. digest 3b045b0564b2.

Golden (oracle-backed) 2 / 2
CVP boundary 2 / 2
Invalid input 2 / 2
Property 3 / 3
Metamorphic 2 / 2
Cross-interface 1 / 1
CVP contract 6 / 6
Interfaces PASS · UI (SSR) / REST / MCP
Interface claim ui-ssr is query-result HTML, not a live browser session.
Assurance Engineering

release artifacts aligned PASS
schema output required declared PASS
schema valid input executes PASS
engine success output validates schema PASS
schema rejects incomplete input PASS
rest success payload validates schema PASS

Fingerprint sha256:1bf56cb6df01415c30eed11a5e57d96c66c10ccb98f2bf0dcf1f8754ba7c52e9

Input schema sha256:a6b70951cddd4e72f68a1b23fe9d088b2d79a0220d309e2d5b9e7aef13e7a607 · Output schema sha256:f832e6cd5e52dbbe128c58037a48a2dea4ab27d1c59da5f09da25f2f7f030f45 · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Build & scope

Engine identity and declared limitations.

Tool: pcb-via-current
Engine: pcb-via-current
Engine build: 2026-09-10
Evidence core: 2026-09-06T13:18:51.762Z
Rendered: 2026-11-10T05:18:41.734Z
Last reviewed: 2026-08-08

Limitations

IPC-2221 closed form
t≥d/2 → PLATING_TOO_THICK

Sources

Standards and references supporting this tool specification. Methods are listed separately — they are algorithms, not bibliographic sources.

IPC-2221 — Generic Standard on Printed Board Design — Conductor current capacity
Supports: I = k·ΔT^0.44·A^0.725 applied to via plating area
IPC-2152 — Standard for Determining Current-Carrying Capacity — Via / conductor thermal ampacity guidance
Supports: Temperature-rise ampacity context for plated vias

Verification disclosure

Aggregate outcomes, scope and artifact commitments are public. Complete test inputs, expected values, execution records and oracle infrastructure are retained privately. This summary does not independently reproduce the full verification run.