0437.500WR

{
  "slug": "0437-500wr",
  "version": "0.1.0",
  "type": "component",
  "description": "Littelfuse Disposable Fuses, 1206. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "circuit protection",
    "0437.500wr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "0437-500wr.kicad_sym",
    "0437-500wr.kicad_mod",
    "0437-500wr.glb",
    "0437-500wr.step",
    "0437-500wr.lbr",
    "docs/hero.png",
    "docs/0437-500wr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "0437-500wr-hero.glb",
    "0437-500wr-hero.overlay.json"
  ],
  "component": {
    "mpn": "0437.500WR",
    "manufacturer": "Littelfuse",
    "package": "1206",
    "pin_count": 2,
    "category": "Circuit Protection",
    "subcategory": "Disposable Fuses",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588910039529115648",
    "parts": {
      "symbol": "0437-500wr.kicad_sym",
      "footprint": "0437-500wr.kicad_mod",
      "model_3d": "0437-500wr-hero.glb",
      "model_3d_plain": "0437-500wr.glb",
      "model_3d_step": "0437-500wr-etched.step",
      "model_3d_step_plain": "0437-500wr.step",
      "lbr": "0437-500wr.lbr"
    },
    "distributor_links": {
      "lcsc": "C206953",
      "digikey": "F2879TR-ND",
      "mouser": "576-0437.500WR"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T18:56:05Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "F2879TR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "576-0437.500WR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1",
        "type": "passive",
        "description": "One of two interchangeable Ag/Ni/Sn end terminations of the 0.500 A fast-acting fuse, rated 63 V AC/DC with 50 A @ 63 V AC/DC interrupting rating."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "Second interchangeable end termination of the fuse, nominal resistance 0.908 ohm and 0.52 V nominal drop at rated current; device is non-polarized."
      }
    ],
    "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 package drawing shows two unnumbered end terminations on a non-polarized fuse. The pin",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 3,
        "cost_usd": 0.1125,
        "at": "2026-10-09T18:53:00"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588910039529115648",
        "pages": 3,
        "sha256": "a7789cf92a0beba5",
        "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": "0437-500wr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.2,
          1.6,
          0.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "5e6dcbe286696143d35a8ea37d91eef4b54ff3d1bd7c2c2b4dedda83d3f8e203",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "0437-500wr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.2,
          1.6,
          0.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "aacc0112ad4841e19305d924b0015d546c2be1ba8d76c7b0ed3e2f1c18e98ac5",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}