TL431CTA

{
  "slug": "tl431cta",
  "version": "0.1.0",
  "type": "component",
  "description": "HTC Korea TAEJIN Tech Voltage References, TO-92-2.54mm. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management ics",
    "tl431cta",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tl431cta.kicad_sym",
    "tl431cta.kicad_mod",
    "tl431cta.glb",
    "tl431cta.step",
    "tl431cta.lbr",
    "docs/hero.png",
    "docs/tl431cta-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tl431cta-hero.glb",
    "tl431cta-hero.overlay.json",
    "tl431cta-etched.glb"
  ],
  "component": {
    "mpn": "TL431CTA",
    "manufacturer": "HTC Korea TAEJIN Tech",
    "package": "TO-92-2.54mm",
    "pin_count": 3,
    "category": "Power Management ICs",
    "subcategory": "Voltage References",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/fbab8650a9f94dfaabffdcf022d40f01.pdf",
    "parts": {
      "symbol": "tl431cta.kicad_sym",
      "footprint": "tl431cta.kicad_mod",
      "model_3d": "tl431cta-hero.glb",
      "model_3d_plain": "tl431cta-etched.glb",
      "model_3d_step": "tl431cta-etched.step",
      "model_3d_step_plain": "tl431cta.step",
      "lbr": "tl431cta.lbr"
    },
    "distributor_links": {
      "lcsc": "C126098",
      "digikey": "5536-TL431CTATB-ND"
    },
    "distributor_check": {
      "checked_at": "2026-10-29T01:26:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "5536-TL431CTATB-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Reference",
        "type": "input",
        "description": "Reference voltage input, which for TL431C is 2.483 V to 2.507 V at VKA = VREF and IK = 10 mA, with a reference input current of 1.8 uA typ. and 4.0 uA max."
      },
      {
        "number": "2",
        "name": "Anode",
        "type": "passive",
        "description": "Common terminal of the shunt regulator that the cathode current returns to; the pin description table labels this pin Ground."
      },
      {
        "number": "3",
        "name": "Cathode",
        "type": "passive",
        "description": "Cathode is the regulated shunt output, recommended to operate from VREF up to 40 V with a cathode current of 0.5 mA to 100 mA, and absolute maximum cathode voltage of 42 V."
      }
    ],
    "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 pin description table on page 4 lists pin 2 (Anode) as 'Ground' and pin 3 (Cathode) as 'Input Su; Pin electrical types are assigned from KiCad classes because the datasheet does not state them. The ; The datasheet gives a single TO-92 package drawing and does not state the lead pitch in the text. Th"
        ],
        "pages_sent": 12,
        "cost_usd": 0.0275,
        "at": "2026-10-29T01:26:05"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/fbab8650a9f94dfaabffdcf022d40f01.pdf",
        "pages": 12,
        "sha256": "0a0d5fc0a3221190",
        "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": "tl431cta.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          4.83,
          3.745,
          9.8
        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
        "sha256": "f0b61c32ecbf0067157adc5a3d4966ceadf5d6dafe93c51af35f76c41c71a54a",
        "checked": "2026-10-29",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tl431cta-etched.step",
        "role": "eda",
        "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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          3.745,
          9.8
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        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
        "sha256": "22fe60d961383d80bfe536078d25579d7a9d1b53617c43f46ce525f50a60a9e1",
        "checked": "2026-10-29",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}