431S

{
  "slug": "431s",
  "version": "0.2.2",
  "type": "component",
  "description": "Shenzhen Fuman Voltage Reference, SOT-23-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "pmic",
    "431s"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "431s.kicad_sym",
    "431s.kicad_mod",
    "431s.glb",
    "431s.step",
    "431s-etched.step",
    "431s.lbr",
    "docs/hero.png",
    "docs/431s-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "pads.json",
    "431s-etched.glb",
    "431s-hero.glb",
    "431s-hero.overlay.json"
  ],
  "visibility": "public",
  "component": {
    "mpn": "431S",
    "manufacturer": "Shenzhen Fuman",
    "package": "SOT-23-3",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Reference",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/199898d349e6bc4cf462cfbe61f2ea50.pdf",
    "parts": {
      "symbol": "431s.kicad_sym",
      "footprint": "431s.kicad_mod",
      "model_3d": "431s-hero.glb",
      "model_3d_plain": "431s.glb",
      "model_3d_step": "431s-etched.step",
      "model_3d_step_plain": "431s.step",
      "lbr": "431s.lbr"
    },
    "distributor_links": {
      "lcsc": "C19630716"
    },
    "pins": [
      {
        "number": "1",
        "name": "REF",
        "type": "input",
        "description": "Reference input to the internal 2.5 V bandgap comparator. Tie to the resistive divider between cathode and anode to program VKA = Vref*(1+R1/R2)+Iref*R1. Reference input current typ 0.2 µA (max 4 µA); IREF absolute range -0.05 to +10 mA."
      },
      {
        "number": "2",
        "name": "A",
        "type": "power_in",
        "description": "Anode. Common ground/return terminal of the shunt regulator; the low side of the R1/R2 programming divider and the low side of the load."
      },
      {
        "number": "3",
        "name": "K",
        "type": "power_in",
        "description": "Cathode. High-side terminal; sinks current from the supply through a series resistor. VKA continuous rating 40 V max, cathode current -100 to +150 mA, regulation from IK(min) ~0.05 mA up to 100 mA."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/199898d349e6bc4cf462cfbe61f2ea50.pdf",
        "pages": 4,
        "sha256": "89e58cf6f78a06cf",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -1.1375,
        -0.95
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-23-3@sha256:ab2ce7041629a2c0",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "431s.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": "16964b14f93e6c778288a0c110b35f670fab733109c26f0da7dfc07cc3350040",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "431s-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          3,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d6821d2470c458ccd5f727f64262435de49fa86024bb40ceca12286769441ffd",
        "checked": "2026-11-12",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "title": "431S",
  "brief": "Shenzhen Fuman Voltage Reference, SOT-23-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "metadata": {
    "specs": {
      "Manufacturer": "Shenzhen Fuman",
      "Package": "SOT-23-3",
      "Category": "PMIC",
      "Pins": "3"
    }
  },
  "discovery_triggers": [
    "431s"
  ],
  "discovery_pitch": "431S (Shenzhen Fuman) component page with datasheet-verified CAD."
}