BR431M

{
  "schema_version": 1,
  "type": "component",
  "slug": "br431m",
  "title": "BR431M",
  "brief": "Foshan Blue Rocket Elec Voltage Reference, SOT-23. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "br431m"
  ],
  "component": {
    "mpn": "BR431M",
    "manufacturer": "Foshan Blue Rocket Elec",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Reference",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2212121530_Foshan-Blue-Rocket-Elec-BR431M_C5328702.pdf",
    "parts": {
      "symbol": "br431m.kicad_sym",
      "footprint": "br431m.kicad_mod",
      "model_3d": "br431m-etched.glb",
      "model_3d_plain": "br431m.glb",
      "model_3d_step": "br431m-etched.step",
      "model_3d_step_plain": "br431m.step",
      "lbr": "br431m.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "R",
        "type": "input",
        "description": "Reference input. The internal error amplifier compares this pin against the 2.500V internal reference; typically driven from a resistor divider between cathode and anode to set the regulated cathode voltage (VKA = (1 + R1/R2)·Vref). IREF ~1 μA typical."
      },
      {
        "number": "2",
        "name": "K",
        "type": "passive",
        "description": "Cathode. Shunt terminal that sinks the regulated current (1 mA to 100 mA operating, 100 mA absolute max). Supports VKA up to 37 V; when VREF exceeds 2.5 V the cathode conducts, clamping VKA."
      },
      {
        "number": "3",
        "name": "A",
        "type": "passive",
        "description": "Anode. Return terminal for cathode sink current and reference; typically tied to circuit ground/common in shunt-regulator configurations."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2212121530_Foshan-Blue-Rocket-Elec-BR431M_C5328702.pdf",
        "pages": 7,
        "sha256": "ac51a1796cf0b933",
        "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"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Foshan Blue Rocket Elec",
      "Package": "SOT-23",
      "Category": "PMIC",
      "Pins": "3"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "br431m"
  ],
  "discovery_pitch": "BR431M (Foshan Blue Rocket Elec) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "br431m.kicad_sym",
    "br431m.kicad_mod",
    "br431m.glb",
    "br431m.step",
    "br431m.lbr",
    "docs/hero.png",
    "docs/br431m-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "br431m-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "BR431MM",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-24T18:07:15.937Z"
}