LM431BCZX

{
  "slug": "lm431bczx",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi Voltage References, TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management ics",
    "lm431bczx",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm431bczx.kicad_sym",
    "lm431bczx.kicad_mod",
    "lm431bczx.glb",
    "lm431bczx.step",
    "lm431bczx.lbr",
    "docs/hero.png",
    "docs/lm431bczx-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm431bczx-hero.glb",
    "lm431bczx-hero.overlay.json",
    "lm431bczx-etched.glb"
  ],
  "component": {
    "mpn": "LM431BCZX",
    "manufacturer": "onsemi",
    "package": "TO-92",
    "pin_count": 3,
    "category": "Power Management ICs",
    "subcategory": "Voltage References",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/lm431bczx-d.pdf",
    "parts": {
      "symbol": "lm431bczx.kicad_sym",
      "footprint": "lm431bczx.kicad_mod",
      "model_3d": "lm431bczx-hero.glb",
      "model_3d_plain": "lm431bczx-etched.glb",
      "model_3d_step": "lm431bczx-etched.step",
      "model_3d_step_plain": "lm431bczx.step",
      "lbr": "lm431bczx.lbr"
    },
    "distributor_links": {
      "lcsc": "C903058",
      "digikey": "LM431BCZXTR-ND",
      "mouser": "512-LM431BCZX"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T03:23:29Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LM431BCZXTR-ND",
        "status": "found",
        "lifecycle": "Obsolete"
      },
      "mouser": {
        "pn": "512-LM431BCZX",
        "status": "found",
        "lifecycle": "End of Life"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "REF",
        "type": "input",
        "description": "Reference input that sets the cathode voltage from VREF (approximately 2.5 V) up to 36 V via an external divider, with reference input current of 1.5 µA typ and 4.0 µA max."
      },
      {
        "number": "2",
        "name": "ANODE",
        "type": "power_in",
        "description": "Anode, the common/ground-side terminal of the shunt regulator, which carries the cathode current of 1.0 to 100 mA."
      },
      {
        "number": "3",
        "name": "CATHODE",
        "type": "passive",
        "description": "Cathode, the regulated output terminal, which operates from VREF to 36 V (37 V absolute maximum) and sinks 1.0 to 100 mA."
      }
    ],
    "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 lists two TO-92 cases (135AN straight and 135AR leadformed). It does not say which one"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0647,
        "at": "2026-10-23T03:23:16"
      },
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/lm431bczx-d.pdf",
        "pages": 9,
        "sha256": "57e85c256a1a8451",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "lm431bczx.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
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        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
        "sha256": "f0b61c32ecbf0067157adc5a3d4966ceadf5d6dafe93c51af35f76c41c71a54a",
        "checked": "2026-10-23",
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      },
      {
        "file": "lm431bczx-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
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        "sha256": "d8ac527c9f006ffadb3cec5f81e2892bd2f29409e061e8663016046f47b7dd7d",
        "checked": "2026-10-23",
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  }
}