BLM18KG121TN1D

{
  "slug": "blm18kg121tn1d",
  "version": "0.1.0",
  "type": "component",
  "description": "Murata Electronics Ferrite Beads, 0603. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "filters",
    "blm18kg121tn1d",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "blm18kg121tn1d.kicad_sym",
    "blm18kg121tn1d.kicad_mod",
    "blm18kg121tn1d.glb",
    "blm18kg121tn1d.step",
    "blm18kg121tn1d.lbr",
    "docs/hero.png",
    "docs/blm18kg121tn1d-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "blm18kg121tn1d-hero.glb",
    "blm18kg121tn1d-hero.overlay.json",
    "blm18kg121tn1d-etched.glb"
  ],
  "component": {
    "mpn": "BLM18KG121TN1D",
    "manufacturer": "Murata Electronics",
    "package": "0603",
    "pin_count": 2,
    "category": "Filters",
    "subcategory": "Ferrite Beads",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586175838752948224",
    "parts": {
      "symbol": "blm18kg121tn1d.kicad_sym",
      "footprint": "blm18kg121tn1d.kicad_mod",
      "model_3d": "blm18kg121tn1d-hero.glb",
      "model_3d_plain": "blm18kg121tn1d-etched.glb",
      "model_3d_step": "blm18kg121tn1d-etched.step",
      "model_3d_step_plain": "blm18kg121tn1d.step",
      "lbr": "blm18kg121tn1d.lbr"
    },
    "distributor_links": {
      "lcsc": "C85831"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T10:40:20Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1",
        "type": "passive",
        "description": "First electrode of the two-terminal chip ferrite bead (120Ω±25% at 100MHz, rated current 3000mA at 85°C and 1900mA at 125°C, DC resistance 0.030Ω max. typical and 0.040Ω max. after testing)."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "Second electrode of the two-terminal chip ferrite bead, interchangeable with the first (equivalent circuit is an inductor in series with a resistance element, with resistance dominant at high frequencies; operating temperature -55°C to +125°C)."
      }
    ],
    "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 shows a two-electrode chip bead and an equivalent circuit with two terminals. It print; This datasheet covers the whole BLM18 series. The BLM18KG121TN1D values (120Ω±25%, 3000mA at 85°C, 1",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 12,
        "cost_usd": 0.2263,
        "at": "2026-10-19T10:37:59"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586175838752948224",
        "pages": 12,
        "sha256": "f2b3b23d6ae4da86",
        "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": "blm18kg121tn1d.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": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b0136ad7160588d2f5dac8c85da84a35646db656b5bc54bbb873b6b548eedbb3",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "blm18kg121tn1d-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          1.6,
          0.8,
          0.8
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "71d746590f58f5f98c55aaa59df13b76ca7dd256d7e1e6ec103f82908ffede3c",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}