BLM31PG391SN1L

{
  "slug": "blm31pg391sn1l",
  "version": "0.1.0",
  "type": "component",
  "description": "Murata Electronics Ferrite Beads, 1206. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "filters",
    "blm31pg391sn1l",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "blm31pg391sn1l.kicad_sym",
    "blm31pg391sn1l.kicad_mod",
    "blm31pg391sn1l.glb",
    "blm31pg391sn1l.step",
    "blm31pg391sn1l.lbr",
    "docs/hero.png",
    "docs/blm31pg391sn1l-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "blm31pg391sn1l-hero.glb",
    "blm31pg391sn1l-hero.overlay.json",
    "blm31pg391sn1l-etched.glb"
  ],
  "component": {
    "mpn": "BLM31PG391SN1L",
    "manufacturer": "Murata Electronics",
    "package": "1206",
    "pin_count": 2,
    "category": "Filters",
    "subcategory": "Ferrite Beads",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588935580637519872",
    "parts": {
      "symbol": "blm31pg391sn1l.kicad_sym",
      "footprint": "blm31pg391sn1l.kicad_mod",
      "model_3d": "blm31pg391sn1l-hero.glb",
      "model_3d_plain": "blm31pg391sn1l-etched.glb",
      "model_3d_step": "blm31pg391sn1l-etched.step",
      "model_3d_step_plain": "blm31pg391sn1l.step",
      "lbr": "blm31pg391sn1l.lbr"
    },
    "distributor_links": {
      "lcsc": "C88995",
      "digikey": "490-5229-2-ND",
      "mouser": "81-BLM31P391S"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T16:44:49Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "490-5229-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "81-BLM31P391S",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1",
        "type": "passive",
        "description": "Electrode at one end of the 3.2 x 1.6 mm chip ferrite bead, in series with the other terminal (390 ohm ±25% at 100 MHz, 2000 mA rated at 85°C, 1250 mA at 125°C, 0.05 ohm max initial DC resistance)."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "Electrode at the opposite end of the chip ferrite bead, in series with the other terminal (390 ohm ±25% at 100 MHz, 2000 mA rated at 85°C, 1250 mA at 125°C, 0.05 ohm max initial DC resistance)."
      }
    ],
    "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 draws two electrodes and a two-terminal equivalent circuit but prints no pin numbers o; The datasheet gives the package only as dimensions (3.2±0.2 x 1.6±0.2 mm, T = 1.1±0.2 mm for BLM31PG",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 9,
        "cost_usd": 0.2149,
        "at": "2026-10-28T16:44:42"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588935580637519872",
        "pages": 9,
        "sha256": "ffa1d1367ba3080c",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 2,
        "described": 2,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "blm31pg391sn1l.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.2,
          1.6,
          1.6
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "7a76ea34101f04e5f76cf96aa1ead38be0f0b388f5d21e9dafbb3047c495e5dd",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "blm31pg391sn1l-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.2,
          1.6,
          1.6
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "a1d5256bfff7bc3989f37f3805b85f1833459bfdc7060f19cc59a01508f823cf",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}