TL431D

{
  "schema_version": 1,
  "type": "component",
  "slug": "tl431d",
  "title": "TL431D",
  "brief": "ALJ Voltage Reference, SOT-23. 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",
    "power management (pmic)",
    "tl431d",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "TL431D",
    "manufacturer": "ALJ",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603367603460972544",
    "parts": {
      "symbol": "tl431d.kicad_sym",
      "footprint": "tl431d.kicad_mod",
      "model_3d": "tl431d-hero.glb",
      "model_3d_plain": "tl431d.glb",
      "model_3d_step": "tl431d-etched.step",
      "model_3d_step_plain": "tl431d.step",
      "lbr": "tl431d.lbr"
    },
    "distributor_links": {
      "lcsc": "C22392283"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T16:45:09Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "REFERENCE",
        "type": "input",
        "description": "Reference input of the adjustable shunt regulator, which is regulated to VREF of 2.485 V min, 2.495 V typ and 2.505 V max at VKA = VREF and IKA = 1 mA."
      },
      {
        "number": "2",
        "name": "CATHODE",
        "type": "passive",
        "description": "Cathode terminal, rated to 40 V absolute maximum with a continuous cathode current of -100 to 120 mA, and recommended operating up to 36 V with IKA of 0.1 to 100 mA."
      },
      {
        "number": "3",
        "name": "ANODE",
        "type": "passive",
        "description": "Anode terminal, the other current-carrying terminal of the shunt regulator, which must sink at least 40 µA typ (80 µA max) of cathode current for regulation."
      }
    ],
    "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 state whether the ANODE is a ground/return or a power pin, so the KiCad type ; Source inconsistency: the General Description gives reference tolerance grades of ±0.5% and ±1.0%, w"
        ],
        "pages_sent": 9,
        "cost_usd": 0.027,
        "at": "2026-10-09T16:44:41"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603367603460972544",
        "pages": 9,
        "sha256": "20bc8649b08decae",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "tl431d.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tl431d-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "ae96d5bcaf9d5d1690606872a3db86dc78f07cc94e62832f5297fe08f78cd8e6",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "ALJ",
      "Package": "SOT-23",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "tl431d"
  ],
  "discovery_pitch": "TL431D (ALJ) 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",
    "tl431d.kicad_sym",
    "tl431d.kicad_mod",
    "tl431d.glb",
    "tl431d.step",
    "tl431d.lbr",
    "docs/hero.png",
    "docs/tl431d-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tl431d-hero.glb",
    "tl431d-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}