MM3Z18B

{
  "schema_version": 1,
  "type": "component",
  "slug": "mm3z18b",
  "title": "MM3Z18B",
  "brief": "ST Semtech Zener Diodes, SOD-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "diodes",
    "mm3z18b",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MM3Z18B",
    "manufacturer": "ST Semtech",
    "package": "SOD-323",
    "pin_count": 2,
    "category": "Diodes",
    "subcategory": "Zener Diodes",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603065697899454464",
    "parts": {
      "symbol": "mm3z18b.kicad_sym",
      "footprint": "mm3z18b.kicad_mod",
      "model_3d": "mm3z18b-hero.glb",
      "model_3d_plain": "mm3z18b-etched.glb",
      "model_3d_step": "mm3z18b-etched.step",
      "model_3d_step_plain": "mm3z18b.step",
      "lbr": "mm3z18b.lbr"
    },
    "distributor_links": {
      "lcsc": "C7464250"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T18:40:12Z",
      "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 of the Zener diode, identified on the package by the cathode line in the marking."
      },
      {
        "number": "2",
        "name": "Anode",
        "type": "passive",
        "description": "Anode of the Zener diode."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-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 does not list MM3Z18B. The closest part is MM3ZB18 (18 V nominal, marking EZ, Vz 17.64; The datasheet gives no electrical limits for individual pins. Pin descriptions state only the pin fu"
        ],
        "pages_sent": 4,
        "cost_usd": 0.0174,
        "at": "2026-10-22T18:39:48"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603065697899454464",
        "pages": 4,
        "sha256": "516fde18dd79a5a8",
        "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": "mm3z18b.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          1.25,
          1.11
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "cd8619b2119cd95683a2c5e660ab4f2d4db674f696cd6f9e9756f221171a214d",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mm3z18b-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          1.25,
          1.11
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "2a9560f1bfd624d5fc07358cf2484a187b7401ebafb2850d3b32e99003941d4b",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "ST Semtech",
      "Package": "SOD-323",
      "Category": "Diodes",
      "Pins": "2"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "mm3z18b"
  ],
  "discovery_pitch": "MM3Z18B (ST Semtech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mm3z18b.kicad_sym",
    "mm3z18b.kicad_mod",
    "mm3z18b.glb",
    "mm3z18b.step",
    "mm3z18b.lbr",
    "docs/hero.png",
    "docs/mm3z18b-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mm3z18b-hero.glb",
    "mm3z18b-hero.overlay.json",
    "mm3z18b-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}