main
Ray Set visibility: public 7eeb5dc 11d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "1812l020pr",
  "title": "1812L020PR",
  "brief": "Littelfuse Resettable Fuses, 1812. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "circuit protection",
    "1812l020pr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "1812L020PR",
    "manufacturer": "Littelfuse",
    "package": "1812",
    "pin_count": 2,
    "category": "Circuit Protection",
    "subcategory": "Resettable Fuses",
    "datasheet": "https://www.littelfuse.com/assetdocs/resettable-ptcs-1812l-datasheet?assetguid=CA5C80CB-504E-4A8A-8E74-0107520A1717",
    "parts": {
      "symbol": "1812l020pr.kicad_sym",
      "footprint": "1812l020pr.kicad_mod",
      "model_3d": "1812l020pr-hero.glb",
      "model_3d_plain": "1812l020pr-etched.glb",
      "model_3d_step": "1812l020pr-etched.step",
      "model_3d_step_plain": "1812l020pr.step",
      "lbr": "1812l020pr.lbr"
    },
    "distributor_links": {
      "lcsc": "C151167",
      "digikey": "F3354TR-ND",
      "mouser": "576-1812L020PR"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T19:07:16Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "F3354TR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "576-1812L020PR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1",
        "type": "passive",
        "description": "Terminal 1 of an unpolarised fuse; either orientation."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "Terminal 2 of an unpolarised fuse; either orientation."
      }
    ],
    "provenance": {
      "extractor": "extract_pins",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins",
        "primary_model": "two-terminal convention",
        "primary_mode": "convention",
        "consensus_model": null,
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 8,
        "cost_usd": 0.0029,
        "at": "2026-10-28T19:07:07"
      },
      "datasheet": {
        "url": "https://www.littelfuse.com/assetdocs/resettable-ptcs-1812l-datasheet?assetguid=CA5C80CB-504E-4A8A-8E74-0107520A1717",
        "pages": 8,
        "sha256": "410cca68bb84b17c",
        "source_tier": "mfr"
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      "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": "1812l020pr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.52,
          3.22,
          0.9
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "e3ef2fb1f3f548610650018f49eb3a6fe90df965c38522dccdc062b04dabd24b",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "1812l020pr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          3.22,
          0.9
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "f914c54b4bb62c23b9fc9bef4fd12eab9f1d84f719cefbb99c81b781d013b151",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "1812",
      "source_page": 6,
      "D": {
        "nom_mm": 4.55,
        "range_mm": [
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          4.73
        ]
      },
      "E1": {
        "nom_mm": 3.24,
        "range_mm": [
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          3.41
        ]
      },
      "A": {
        "nom_mm": 0.775,
        "range_mm": [
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          1
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "1812l020pr.step",
        "verdict": "PASS",
        "reasons": [
          "height within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Littelfuse",
      "Package": "1812",
      "Category": "Circuit Protection",
      "Pins": "2"
    },
    "appearance": {
      "contacts": {
        "quote": "Terminal Material Solder-Plated Copper (Solder Material:",
        "page": 4,
        "doc": "ds.pdf",
        "material": "Copper"
      },
      "version": 1,
      "datasheet_sha256": "410cca68bb84b17c956a5038fbd7feb38cf1610e913f59a5268aedce97116902"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "410cca68bb84b17c956a5038fbd7feb38cf1610e913f59a5268aedce97116902",
      "rows": [
        {
          "name": "Minimum resistance (initial, un-soldered)",
          "symbol": "R min",
          "kind": "electrical",
          "unit": "Ω",
          "min": 0.8,
          "typ": null,
          "max": null,
          "conditions": "initial (un-soldered) state",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum resistance after trip or reflow",
          "symbol": "R 1max",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "20°C, measured one hour after tripping or reflow soldering of 260°C for 20 sec",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Trip current",
          "symbol": "I trip",
          "kind": "electrical",
          "unit": "A",
          "min": 0.4,
          "typ": null,
          "max": null,
          "conditions": "20°C still air",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum voltage",
          "symbol": "V max",
          "kind": "electrical",
          "unit": "Vdc",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "at rated current (I max)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum fault current",
          "symbol": "I max",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "at rated voltage (Vmax)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum time to trip",
          "symbol": "",
          "kind": "electrical",
          "unit": "Sec.",
          "min": null,
          "typ": null,
          "max": 0.02,
          "conditions": "at 8.00 A",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Passive aging resistance change",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "+85°C, 1000 hours; typical resistance change",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Humidity aging resistance change",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "+85°C, 85% R.H., 1000 hours; typical resistance change",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "Operating Temp.",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum device surface temperature in tripped state",
          "symbol": "",
          "kind": "thermal",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "tripped state",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Peak classification temperature (reflow)",
          "symbol": "TP",
          "kind": "thermal",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Pb-free reflow profile; printed as 260+0/-5 °C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Hold current",
          "symbol": "I hold",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 0.2,
          "max": null,
          "conditions": "20°C still air",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power dissipated in tripped state",
          "symbol": "P d",
          "kind": "electrical",
          "unit": "W",
          "min": null,
          "typ": 0.8,
          "max": null,
          "conditions": "tripped state at 20°C still air",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Resistance change after thermal shock",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": null,
          "typ": -30,
          "max": null,
          "conditions": "MIL-STD-202 Method 107, +85°C/-40°C 20 times; typical resistance change",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Hold current vs ambient temperature",
          "symbol": "I hold",
          "kind": "temperature_coefficient",
          "unit": "A",
          "min": null,
          "typ": 0.29,
          "max": null,
          "conditions": "ambient -40°C",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Hold current vs ambient temperature",
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          "source": "datasheet"
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          "name": "Hold current vs ambient temperature",
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          "name": "Hold current vs ambient temperature",
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          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Hold current vs ambient temperature",
          "symbol": "I hold",
          "kind": "temperature_coefficient",
          "unit": "A",
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          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Hold current vs ambient temperature",
          "symbol": "I hold",
          "kind": "temperature_coefficient",
          "unit": "A",
          "min": null,
          "typ": 0.15,
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          "conditions": "ambient 50°C",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Hold current vs ambient temperature",
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          "kind": "temperature_coefficient",
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          "conditions": "ambient 60°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Hold current vs ambient temperature",
          "symbol": "I hold",
          "kind": "temperature_coefficient",
          "unit": "A",
          "min": null,
          "typ": 0.12,
          "max": null,
          "conditions": "ambient 70°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Hold current vs ambient temperature",
          "symbol": "I hold",
          "kind": "temperature_coefficient",
          "unit": "A",
          "min": null,
          "typ": 0.1,
          "max": null,
          "conditions": "ambient 85°C",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "1812l020pr"
  ],
  "discovery_pitch": "1812L020PR (Littelfuse) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "viewers/footprint.html",
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    "1812l020pr-hero.overlay.json",
    "1812l020pr-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}