main
Ray Set visibility: public 78da4dc 3d ago
{
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  "type": "component",
  "slug": "blm21bd331sn1d",
  "title": "BLM21BD331SN1D",
  "brief": "Murata Electronics Ferrite Beads, 0805. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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    "mpn": "BLM21BD331SN1D",
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    "package": "0805",
    "pin_count": 2,
    "category": "Filters",
    "subcategory": "Ferrite Beads",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589887302232412160",
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      "lbr": "blm21bd331sn1d.lbr"
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    "distributor_links": {
      "lcsc": "C710506",
      "digikey": "490-11045-2-ND",
      "mouser": "81-BLM21BD331SN1D"
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    "distributor_check": {
      "checked_at": "2026-11-07T03:54:39Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "490-11045-2-ND",
        "status": "found",
        "lifecycle": "Active"
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        "pn": "81-BLM21BD331SN1D",
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    "pins": [
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        "name": "1",
        "type": "passive",
        "description": "First electrode of the two-terminal ferrite bead (330 ohm typ. at 100MHz, rated 300 mA, 0.3 ohm max. DC resistance initial); terminals are interchangeable."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "Second electrode of the two-terminal ferrite bead, in series with the first through the inductor-plus-resistance equivalent circuit; operating range -55°C to +125°C."
      }
    ],
    "provenance": {
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        "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": [
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        "pages_sent": 10,
        "cost_usd": 0.2431,
        "at": "2026-11-07T03:54:29"
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        "pages": 10,
        "sha256": "778f317c7d9e698b",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 2,
        "described": 2,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "751a8ae26d20698bfe8303aa2fc7ec986a8b9a7154699b94bf2a13d4ad401425",
        "checked": "2026-11-07",
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        "file": "blm21bd331sn1d-etched.step",
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        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "29d2d661e68bf1c2a1c4bb820ff4e909dc61e68bf58d15e766b8ef9c2dac1e7d",
        "checked": "2026-11-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Murata Electronics",
      "Package": "0805",
      "Category": "Filters",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "778f317c7d9e698b48172a2e6678eb7c8865cc8a0830cd742522cc0d6e1d3142",
      "rows": [
        {
          "name": "DC resistance",
          "symbol": "",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.3,
          "max": 0.4,
          "conditions": "Initial values; measured with digital multimeter, excludes substrate and wire resistance",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Impedance tolerance at 100MHz",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -25,
          "typ": null,
          "max": 25,
          "conditions": "at 100MHz±1MHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Impedance at 100MHz",
          "symbol": "",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 330,
          "max": null,
          "conditions": "at 100MHz±1MHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Rated current",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Impedance change after resistance to soldering heat",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": -30,
          "typ": null,
          "max": 30,
          "conditions": "At 100MHz after soldering heat test (Sn-3.0Ag-0.5Cu, 270°C±5°C, 10s±0.5s); BLM21SN type is ±50%, not this part",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
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  "discovery_triggers": [
    "blm21bd331sn1d"
  ],
  "discovery_pitch": "BLM21BD331SN1D (Murata Electronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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