main
Ray Set visibility: public 5b2cebb 7d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "431c",
  "title": "431C",
  "brief": "GOFORD Voltage References, 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 ics",
    "431c",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "431C",
    "manufacturer": "GOFORD",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Power Management ICs",
    "subcategory": "Voltage References",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/37951ad3e3210aa79c71a173d79ed06c.pdf",
    "parts": {
      "symbol": "431c.kicad_sym",
      "footprint": "431c.kicad_mod",
      "model_3d": "431c-hero.glb",
      "model_3d_plain": "431c-etched.glb",
      "model_3d_step": "431c-etched.step",
      "model_3d_step_plain": "431c.step",
      "lbr": "431c.lbr"
    },
    "distributor_links": {
      "lcsc": "C2904134"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T20:36:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "REF",
        "type": "input",
        "description": "Reference input that sets the output voltage via an external divider; Vref is about 2.495 V typ, with reference input current of 1.8 µA typ (4 µA max)."
      },
      {
        "number": "2",
        "name": "CATHODE",
        "type": "passive",
        "description": "Cathode (regulated output) terminal rated for VKA up to 40 V and continuous cathode current of -100 to 150 mA, with recommended operation at 0.5 to 100 mA."
      },
      {
        "number": "3",
        "name": "ANODE",
        "type": "power_in",
        "description": "Anode terminal, connected to the most negative potential (ground) of the circuit."
      }
    ],
    "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+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet never says which package the MPN 431C is sold in. SOT-23 was chosen from the package h; The anode description says it is the ground/most negative terminal. That is an inference from the pa",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 5,
        "cost_usd": 0.1621,
        "at": "2026-10-22T20:35:24"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/37951ad3e3210aa79c71a173d79ed06c.pdf",
        "pages": 5,
        "sha256": "91d77641536a5039",
        "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": "431c.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": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "431c-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": "a1fc44d0cd54a3604017cdc89b4c6671dc8a5cd751b178ccc9d34e1131d67993",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "GOFORD",
      "Package": "SOT-23",
      "Category": "Power Management ICs",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "91d77641536a5039baec0728a686af3b54e7d69000206e8f9a9ee5d22bc5b221",
      "rows": [
        {
          "name": "Cathode Voltage",
          "symbol": "VKA",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Continuous Cathode Current Range",
          "symbol": "IK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -100,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Current Range",
          "symbol": "IREF",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": 0.05,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation SOT-23-3",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 0.2,
          "conditions": "at 25℃, SOT-23-3 package",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature Range",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": 0,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range",
          "symbol": "Tg",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": 0,
          "typ": null,
          "max": 70,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction to Ambient SOT-23-3",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": 625,
          "max": null,
          "conditions": "SOT-23-3 package",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Cathode current",
          "symbol": "IK",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": 0.5,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Cathode voltage",
          "symbol": "VKA",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "min is VREF",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Voltage",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 2.483,
          "typ": 2.495,
          "max": 2.507,
          "conditions": "IK=10mA,VKA=VREF",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Deviation of Reference Input Voltage over Full Temperature Range",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 3,
          "max": 17,
          "conditions": "Tmin ≤ Ta ≤ Tmax",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Ratio of Change in Reference Input Voltage to Change in Cathode Voltage (10V to VREF)",
          "symbol": "ΔVREF/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": -0.4,
          "typ": 0,
          "max": 2.7,
          "conditions": "VKA=10V to VREF",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Ratio of Change in Reference Input Voltage to Change in Cathode Voltage (36V to 10V)",
          "symbol": "ΔVREF/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": -0.4,
          "typ": 0,
          "max": 2,
          "conditions": "VKA=36V to 10V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Current",
          "symbol": "IREF",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 1.8,
          "max": 4,
          "conditions": "R1=10K, R2=-",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Deviation of Reference Current over Full Temperature Range",
          "symbol": "Ii(DEV)",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.4,
          "max": 1.2,
          "conditions": "R1=10K, R2=-",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum Cathode Current for Regulation",
          "symbol": "IKmin",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.25,
          "max": 0.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Off-State Cathode Current",
          "symbol": "IK off",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.17,
          "max": 0.9,
          "conditions": "VKA=40V VREF=0",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Dynamic Impedance",
          "symbol": "ZKA",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.27,
          "max": 0.5,
          "conditions": "IK=10mA to 100mA, f≤1.0kHz",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "431c"
  ],
  "discovery_pitch": "431C (GOFORD) 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",
    "431c.kicad_sym",
    "431c.kicad_mod",
    "431c.glb",
    "431c.step",
    "431c.lbr",
    "docs/hero.png",
    "docs/431c-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "431c-hero.glb",
    "431c-hero.overlay.json",
    "431c-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}