{
  "capability_id": "electrical.pcb.trace_thermal",
  "tool_id": "pcb-trace-thermal",
  "engine": "pcb-trace-thermal",
  "calculation_version": "1.0.0",
  "generated_at": "2026-09-16T22:03:43.744Z",
  "engine_build": "2026-09-10",
  "test_count": 4,
  "passed": 4,
  "failed": 0,
  "tests_summary": {
    "golden": {
      "total": 2,
      "passed": 2
    },
    "boundary": {
      "total": 1,
      "passed": 1
    },
    "property": {
      "total": 1,
      "passed": 1
    }
  },
  "engine_tested": true,
  "expert_reviewed": true,
  "internally_reviewed": false,
  "review_kind": "expert",
  "source_checked": true,
  "reviewed_by": "CalculatorX electrical review",
  "reviewer_role": "electrical-engineer",
  "last_reviewed": "2026-08-08",
  "expert_review": {
    "status": "approved",
    "reviewer": {
      "name": "CalculatorX electrical review",
      "role": "electrical-engineer"
    },
    "reviewed_at": "2026-08-08",
    "scope": [
      "formula",
      "input semantics",
      "assumptions",
      "limitations",
      "sources",
      "tests"
    ],
    "kind": "expert"
  },
  "internal_review": {
    "status": "not_applicable",
    "reviewer": null
  },
  "page": "https://www.calculatorx.com/calc/electric/pcb-trace-thermal",
  "api": "https://www.calculatorx.com/api/v1/calc/pcb-trace-thermal",
  "schema_input": "https://www.calculatorx.com/schemas/electrical.pcb.trace_thermal.input.json",
  "schema_output": "https://www.calculatorx.com/schemas/electrical.pcb.trace_thermal.output.json",
  "assumptions": [],
  "limitations": [
    "Uniform copper; lumped board Rth"
  ],
  "boundary_conditions": [
    "I,L,W,t ≤0 → VALUE_MUST_BE_POSITIVE"
  ],
  "sources": [
    {
      "title": "IPC / copper resistivity practice",
      "section": "I²R heating",
      "supports": "R=ρL/A; P=I²R",
      "kind": "reference"
    },
    {
      "title": "JEDEC / PCB thermal design notes",
      "section": "Lumped Rth rise",
      "supports": "dT = P·Rth",
      "kind": "standard"
    }
  ],
  "methods": [],
  "fingerprint": "sha256:fd9e715cfa719fcd06d83f433d33ab62ed0b7df67d6961aa7bf3894deebe83cd",
  "tests": [
    {
      "id": "rise",
      "ok": true,
      "kind": "golden",
      "inputs": {
        "mode": "rise",
        "I_A": 10,
        "L_m": 0.1,
        "W_m": 0.001,
        "t_m": 0.000035,
        "Rth_C_per_W": 50
      },
      "expect": {
        "dT_C": 240
      },
      "expectWarning": null,
      "actual": {
        "mode": "rise",
        "I_A": 10,
        "L_m": 0.1,
        "W_m": 0.001,
        "t_m": 0.000035,
        "rho_ohm_m": 1.68e-8,
        "A_m2": 3.4999999999999996e-8,
        "R_ohm": 0.04800000000000001,
        "P_W": 4.800000000000001,
        "Rth_C_per_W": 50,
        "dT_C": 240.00000000000003
      },
      "tol": 1e-9
    },
    {
      "id": "power",
      "ok": true,
      "kind": "golden",
      "inputs": {
        "mode": "power",
        "I_A": 10,
        "L_m": 0.1,
        "W_m": 0.001,
        "t_m": 0.000035
      },
      "expect": {
        "P_W": 4.8
      },
      "expectWarning": null,
      "actual": {
        "mode": "power",
        "I_A": 10,
        "L_m": 0.1,
        "W_m": 0.001,
        "t_m": 0.000035,
        "rho_ohm_m": 1.68e-8,
        "A_m2": 3.4999999999999996e-8,
        "R_ohm": 0.04800000000000001,
        "P_W": 4.800000000000001
      },
      "tol": 1e-9
    },
    {
      "id": "bad-I",
      "ok": true,
      "kind": "boundary",
      "inputs": {
        "mode": "power",
        "I_A": 0,
        "L_m": 0.1,
        "W_m": 0.001,
        "t_m": 0.000035
      },
      "expectError": "VALUE_MUST_BE_POSITIVE",
      "code": "VALUE_MUST_BE_POSITIVE",
      "error": "I_A must be greater than zero"
    },
    {
      "id": "property-dT",
      "ok": true,
      "kind": "property",
      "detail": "240",
      "expect": 240,
      "actual": 240.00000000000003
    }
  ],
  "tier": "expert_verified",
  "verification": {
    "tests": {
      "passed": 4,
      "total": 4,
      "golden": 2,
      "boundary": 1,
      "property": 1
    },
    "contract_checks": {
      "passed": 4,
      "total": 4
    }
  },
  "evidence_core_generated_at": "2026-09-06T13:16:40.891Z",
  "rendered_at": "2026-09-16T22:03:43.744Z",
  "release_integrity": {
    "status": "verified",
    "scope": "workspace",
    "production_attestation_required": true,
    "calculation_version": "1.0.0",
    "artifacts": {
      "engine": "1.0.0",
      "page": "1.0.0",
      "capability": "1.0.0",
      "evidence": "1.0.0",
      "input_schema": "1.0.0",
      "output_schema": "1.0.0",
      "mcp_contract": "1.0.0"
    },
    "digests": {
      "input_schema_sha256": "48f72081a3f83919941edcb1332c070d71af16d2dedb850179655860e454ac7c",
      "output_schema_sha256": "ebf06f24de63198fff85739d66316d2d79b25f2fd65ec7d545f3af857f739f59",
      "evidence_sha256": "da0f7df05a0845f2d011407f9cf40b2ac0dc21bb141f385b85fd539510047701",
      "evidence_core_sha256": "da0f7df05a0845f2d011407f9cf40b2ac0dc21bb141f385b85fd539510047701",
      "capability_sha256": "3aa4ff238f2c52e3be93572399537135ffc49fed93cf1a1dd0d4e59766ca1ce6",
      "engine_sha256": "c8d4ccdbfeaf61d7b024d4e1babb0c2ba3b324c1b37bd0cb456a526d8d2b1bd1",
      "mcp_contract_sha256": "863098b311a7b17dc4b229a6302b90b3545b175f716e5d84772c7be8e9716b86"
    },
    "contract_checks": {
      "total": 4,
      "passed": 4,
      "failed": 0,
      "items": [
        {
          "id": "release-artifacts-aligned",
          "status": "pass",
          "detail": "1.0.0"
        },
        {
          "id": "schema-valid-input-executes",
          "status": "pass"
        },
        {
          "id": "engine-success-output-validates-schema",
          "status": "pass"
        },
        {
          "id": "schema-rejects-incomplete-input",
          "status": "pass"
        }
      ]
    },
    "report": "https://www.calculatorx.com/.well-known/calculatorx-release-integrity.json"
  }
}
