3557

{
  "slug": "3557",
  "version": "0.1.0",
  "type": "component",
  "description": "Keystone Electronics Fuseholders, THT, P=3.4mm. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "circuit protection",
    "3557",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "3557.kicad_sym",
    "3557.kicad_mod",
    "3557.glb",
    "3557.step",
    "3557.lbr",
    "docs/hero.png",
    "docs/3557-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "3557-hero.glb",
    "3557-hero.overlay.json"
  ],
  "component": {
    "mpn": "3557",
    "manufacturer": "Keystone Electronics",
    "package": "THT, P=3.4mm",
    "pin_count": 2,
    "category": "Circuit Protection",
    "subcategory": "Fuseholders",
    "datasheet": "https://www.mouser.com/datasheet/3/201/1/3557.pdf",
    "parts": {
      "symbol": "3557.kicad_sym",
      "footprint": "3557.kicad_mod",
      "model_3d": "3557-hero.glb",
      "model_3d_step": "3557.step",
      "lbr": "3557.lbr",
      "model_3d_plain": "3557.glb"
    },
    "distributor_links": {
      "lcsc": "C2680614",
      "mouser": "534-3557"
    },
    "distributor_check": {
      "checked_at": "2026-11-05T20:37:04Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": "534-3557",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "LEG_1",
        "type": "passive",
        "description": "First through-hole leg of the fuse clip, 0.016 in [0.41 mm] thick tin-nickel-plated brass, extending .150 [3.81] below the body into a .063 [1.60] dia. hole at 3.40 mm pitch from the other leg."
      },
      {
        "number": "2",
        "name": "LEG_2",
        "type": "passive",
        "description": "Second through-hole leg of the fuse clip, 0.016 in [0.41 mm] thick tin-nickel-plated brass, extending .150 [3.81] below the body into a .063 [1.60] dia. hole at 3.40 mm pitch from the other leg."
      }
    ],
    "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": "vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The drawing does not number or name the terminals. The two legs are labelled '1' and '2' only as pla; The drawing gives no electrical ratings or pin functions. Both legs are typed passive because the pa",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 1,
        "cost_usd": 0.0346,
        "at": "2026-11-05T20:36:57"
      },
      "datasheet": {
        "url": "https://www.mouser.com/datasheet/3/201/1/3557.pdf",
        "pages": 1,
        "sha256": "a97d2bf27d91b88c",
        "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": "3557.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          4.6,
          4.7,
          9.35
        ],
        "zmin_mm": -3.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "e65793ebfdeb88a65d30bd3e7ca30cd4fa030d12b7e7031bc86f790dc561fc52",
        "checked": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}