BLM18SG121TN1D

{
  "schema_version": 1,
  "type": "component",
  "slug": "blm18sg121tn1d",
  "title": "BLM18SG121TN1D",
  "brief": "Murata Electronics Ferrite Beads, 0603. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "filters",
    "blm18sg121tn1d",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "BLM18SG121TN1D",
    "manufacturer": "Murata Electronics",
    "package": "0603",
    "pin_count": 2,
    "category": "Filters",
    "subcategory": "Ferrite Beads",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588898925176217600",
    "parts": {
      "symbol": "blm18sg121tn1d.kicad_sym",
      "footprint": "blm18sg121tn1d.kicad_mod",
      "model_3d": "blm18sg121tn1d-hero.glb",
      "model_3d_plain": "blm18sg121tn1d-etched.glb",
      "model_3d_step": "blm18sg121tn1d-etched.step",
      "model_3d_step_plain": "blm18sg121tn1d.step",
      "lbr": "blm18sg121tn1d.lbr"
    },
    "distributor_links": {
      "lcsc": "C113030",
      "mouser": "81-BLM18SG121TN1D"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T10:27:37Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "error"
      },
      "mouser": {
        "pn": "81-BLM18SG121TN1D",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1",
        "type": "passive",
        "description": "First terminal electrode of the two-terminal chip ferrite bead (120Ω ±25% at 100MHz, 3000 mA rated at 85°C, 0.025Ω max DC resistance); the part is non-polarized and interchangeable with terminal 2."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "Second terminal electrode of the two-terminal chip ferrite bead (120Ω ±25% at 100MHz, 1000 mA rated at 125°C, 0.035Ω max DC resistance at 125°C); the part is non-polarized and interchangeable with terminal 1."
      }
    ],
    "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 the part as a two-terminal chip with two electrodes and an equivalent circuit (i; Rated current for BLM18SG121TN1D is 3000 mA at 85°C and 1000 mA at 125°C (marked *1). Above 1 A the ",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 12,
        "cost_usd": 0.2214,
        "at": "2026-10-19T10:25:15"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588898925176217600",
        "pages": 12,
        "sha256": "662fddeae58fa04f",
        "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": "blm18sg121tn1d.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          1.6,
          0.8,
          0.8
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b0136ad7160588d2f5dac8c85da84a35646db656b5bc54bbb873b6b548eedbb3",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "blm18sg121tn1d-etched.step",
        "role": "eda",
        "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": "0549a5ab05fab9e6df4a6699d61fa5027fc270a3b6d6d3640aa8343bc8355090",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Murata Electronics",
      "Package": "0603",
      "Category": "Filters",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "catalog",
      "datasheet_sha256": "662fddeae58fa04f62a3ddd7ad9da1a43e7dd65c7592024e0ecd7825b4577795",
      "rows": [
        {
          "name": "Impedance",
          "symbol": "Z",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 120,
          "max": null,
          "conditions": "at 100 MHz, catalog attribute (LCSC C113030)",
          "source_page": null,
          "source": "catalog"
        },
        {
          "name": "Tolerance",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -25,
          "typ": null,
          "max": 25,
          "conditions": "catalog attribute (LCSC C113030)",
          "source_page": null,
          "source": "catalog"
        },
        {
          "name": "Rated current",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 3,
          "conditions": "catalog attribute (LCSC C113030)",
          "source_page": null,
          "source": "catalog"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "blm18sg121tn1d"
  ],
  "discovery_pitch": "BLM18SG121TN1D (Murata Electronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "blm18sg121tn1d.kicad_sym",
    "blm18sg121tn1d.kicad_mod",
    "blm18sg121tn1d.glb",
    "blm18sg121tn1d.step",
    "blm18sg121tn1d.lbr",
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    "docs/blm18sg121tn1d-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "blm18sg121tn1d-hero.glb",
    "blm18sg121tn1d-hero.overlay.json",
    "blm18sg121tn1d-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}