SMCJ188A

{
  "slug": "smcj188a",
  "version": "0.1.0",
  "type": "component",
  "description": "UMW TVS, SMC. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "circuit protection",
    "smcj188a",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "smcj188a.kicad_sym",
    "smcj188a.kicad_mod",
    "smcj188a.glb",
    "smcj188a.step",
    "smcj188a.lbr",
    "docs/hero.png",
    "docs/smcj188a-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "smcj188a-hero.glb",
    "smcj188a-hero.overlay.json",
    "smcj188a-etched.glb"
  ],
  "component": {
    "mpn": "SMCJ188A",
    "manufacturer": "UMW",
    "package": "SMC",
    "pin_count": 2,
    "category": "Circuit Protection",
    "subcategory": "TVS",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/ed1bc89f36386d5d2b8b06ee8da21c4f.pdf",
    "parts": {
      "symbol": "smcj188a.kicad_sym",
      "footprint": "smcj188a.kicad_mod",
      "model_3d": "smcj188a-hero.glb",
      "model_3d_plain": "smcj188a-etched.glb",
      "model_3d_step": "smcj188a-etched.step",
      "model_3d_step_plain": "smcj188a.step",
      "lbr": "smcj188a.lbr"
    },
    "distributor_links": {
      "lcsc": "C2758556"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T21:59:59Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Cathode",
        "type": "passive",
        "description": "Cathode terminal of the unidirectional SMCJ188A TVS diode, marked by the color band on the case; VWM 188V, VBR 209V min to 231V max, VC 328V at IPPM 4.60A."
      },
      {
        "number": "2",
        "name": "Anode",
        "type": "passive",
        "description": "Anode terminal of the unidirectional SMCJ188A TVS diode, the end opposite the color band, with 1500W peak pulse power (10/1000µs) capability."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet pinning section shows only Cathode and Anode symbols for the SMC package and prints no; Pin electrical type is not stated in the datasheet. Both terminals are set to passive, the usual KiC"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0557,
        "at": "2026-10-22T21:59:49"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/ed1bc89f36386d5d2b8b06ee8da21c4f.pdf",
        "pages": 7,
        "sha256": "887bcda70cdf8617",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 2,
        "described": 2,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "smcj188a.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          8.0,
          5.9,
          2.31
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "30dab4c2e22239b7e3694a4d45304e04255c6b70a79d28e9c34c6072ba647991",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "smcj188a-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          8.0,
          5.9,
          2.31
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "1f1289e4d67aa52ecd8f6a385a961e6ddafa1a33131c352898a6c9ebc1462c18",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}