TL431BCM3

{
  "slug": "tl431bcm3",
  "version": "0.1.0",
  "type": "component",
  "description": "HGSEMI Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "tl431bcm3",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tl431bcm3.kicad_sym",
    "tl431bcm3.kicad_mod",
    "tl431bcm3.glb",
    "tl431bcm3.step",
    "tl431bcm3.lbr",
    "docs/hero.png",
    "docs/tl431bcm3-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tl431bcm3-hero.glb",
    "tl431bcm3-hero.overlay.json",
    "tl431bcm3-etched.glb"
  ],
  "component": {
    "mpn": "TL431BCM3",
    "manufacturer": "HGSEMI",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8785206302679216128",
    "parts": {
      "symbol": "tl431bcm3.kicad_sym",
      "footprint": "tl431bcm3.kicad_mod",
      "model_3d": "tl431bcm3-hero.glb",
      "model_3d_plain": "tl431bcm3-etched.glb",
      "model_3d_step": "tl431bcm3-etched.step",
      "model_3d_step_plain": "tl431bcm3.step",
      "lbr": "tl431bcm3.lbr"
    },
    "distributor_links": {
      "lcsc": "C7432063"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T05:09:55Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CATHODE",
        "type": "bidirectional",
        "description": "Shunt current/voltage input for the regulator; the datasheet limits VKA to 36 V recommended (37 V absolute maximum) and IKA to 1 mA to 100 mA."
      },
      {
        "number": "2",
        "name": "REF",
        "type": "input",
        "description": "Threshold input referenced to the common anode, which must be driven with at least about 4 µA of reference current and must not be left floating; for the TL431BC the reference voltage is 2483 to 2507 mV."
      },
      {
        "number": "3",
        "name": "ANODE",
        "type": "power_in",
        "description": "Common pin, normally connected to ground, that returns the cathode current and sets the reference point for the REF input."
      }
    ],
    "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 lists the ANODE pin type as 'O' (output). It is classified here as power_in because th; The datasheet pin type for CATHODE is 'I/O', which is mapped to KiCad bidirectional. Pin 1 is a shun; The pin table on page 4 is garbled in the ANODE row. The SOT-23 TL431 column (CATHODE=1, REF=2, ANOD"
        ],
        "pages_sent": 28,
        "cost_usd": 0.1166,
        "at": "2026-10-18T05:07:43"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8785206302679216128",
        "pages": 28,
        "sha256": "89d7314982a4fe34",
        "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": "tl431bcm3.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3.0,
          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tl431bcm3-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3.0,
          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "1a24c642c885261727eb858ff5a670d3fdb2bb67ef76bd4251d4c71e1c6f2563",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}