main
Ray Set visibility: public 4bec9c3 5d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "1812l300mr",
  "title": "1812L300MR",
  "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",
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    "manufacturer": "Littelfuse",
    "package": "1812",
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    "category": "Circuit Protection",
    "subcategory": "Resettable Fuses",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588899315171803136",
    "parts": {
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      "footprint": "1812l300mr.kicad_mod",
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      "model_3d_plain": "1812l300mr-etched.glb",
      "model_3d_step": "1812l300mr-etched.step",
      "model_3d_step_plain": "1812l300mr.step",
      "lbr": "1812l300mr.lbr"
    },
    "distributor_links": {
      "lcsc": "C127824",
      "digikey": "F4162TR-ND",
      "mouser": "576-1812L300MR"
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    "distributor_check": {
      "checked_at": "2026-10-17T02:59:56Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "F4162TR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "576-1812L300MR",
        "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": {
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      "factory_chain": {
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        "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"
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        "cost_usd": 0.0895,
        "at": "2026-10-17T02:59:33"
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        "pages": 7,
        "sha256": "6208de21968a51c9",
        "source_tier": "lcsc"
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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": {
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      "footprint": "viewers/footprint.html"
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "e8557e646b7410bf469dde4a94db633b115627d5bce6775e1a0733ac1404acc8",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "1812l300mr-etched.step",
        "role": "eda",
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        "units": "mm",
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        "sha256": "3c9873c4bf0a08fab42e4492af99c80ef88b2cf8b3e963085d1fba05267475e4",
        "checked": "2026-10-17",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Littelfuse",
      "Package": "1812",
      "Category": "Circuit Protection",
      "Pins": "2"
    },
    "appearance": {
      "contacts": {
        "quote": "Terminal Material Solder-Plated Copper (Solder Material:",
        "page": 3,
        "doc": "ds.pdf",
        "material": "Copper"
      },
      "version": 1,
      "datasheet_sha256": "6208de21968a51c9eb4783c0fd44d08bd427d77e585e40bfa764dd3bcec59d92"
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    "characteristics": {
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      "source": "datasheet",
      "datasheet_sha256": "6208de21968a51c9eb4783c0fd44d08bd427d77e585e40bfa764dd3bcec59d92",
      "rows": [
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          "name": "Minimum resistance in initial (un-soldered) state",
          "symbol": "R min",
          "kind": "electrical",
          "unit": "Ω",
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          "typ": null,
          "max": null,
          "conditions": "",
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          "conditions": "20°C, measured one hour after tripping or reflow soldering of 260°C for 20 sec",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum voltage device can withstand without damage at rated current",
          "symbol": "V max",
          "kind": "electrical",
          "unit": "Vdc",
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          "typ": null,
          "max": 6,
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        },
        {
          "name": "Maximum fault current device can withstand without damage at rated voltage",
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        {
          "name": "Max. Time To Trip",
          "symbol": "",
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          "unit": "Sec.",
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          "conditions": "at 8.00 A current",
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        },
        {
          "name": "Operating/Storage Temperature",
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        },
        {
          "name": "Max. Device Surface Temp. in Tripped State",
          "symbol": "",
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        },
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          "name": "Passive aging resistance change",
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        },
        {
          "name": "Hold current (maximum current device will pass without tripping)",
          "symbol": "I hold",
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          "min": null,
          "typ": 3,
          "max": null,
          "conditions": "20°C still air",
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        },
        {
          "name": "Trip current (minimum current at which device will trip)",
          "symbol": "I trip",
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          "max": null,
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        {
          "name": "Power dissipated from device in tripped state",
          "symbol": "P d",
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          "name": "Thermal shock resistance change",
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          "source_page": 3,
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  "discovery_triggers": [
    "1812l300mr"
  ],
  "discovery_pitch": "1812L300MR (Littelfuse) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "1812l300mr-hero.overlay.json",
    "1812l300mr-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}