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Ray Set visibility: public c9b4dbc 4d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "1206l050yr",
  "title": "1206L050YR",
  "brief": "Littelfuse Resettable Fuses, 1206. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "circuit protection",
    "1206l050yr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "1206L050YR",
    "manufacturer": "Littelfuse",
    "package": "1206",
    "pin_count": 2,
    "category": "Circuit Protection",
    "subcategory": "Resettable Fuses",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588909033121701888",
    "parts": {
      "symbol": "1206l050yr.kicad_sym",
      "footprint": "1206l050yr.kicad_mod",
      "model_3d": "1206l050yr-hero.glb",
      "model_3d_plain": "1206l050yr-etched.glb",
      "model_3d_step": "1206l050yr-etched.step",
      "model_3d_step_plain": "1206l050yr.step",
      "lbr": "1206l050yr.lbr"
    },
    "distributor_links": {
      "lcsc": "C163512",
      "digikey": "F2112TR-ND",
      "mouser": "576-1206L050YR"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T03:34:14Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "F2112TR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "576-1206L050YR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1",
        "type": "passive",
        "description": "One of two interchangeable solder-plated copper end terminals of the resettable PTC; the 1206L050 is rated 0.50 A hold, 1.00 A trip, 6 Vdc max, 100 A max fault current."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "Second interchangeable solder-plated copper end terminal of the resettable PTC (non-polarized); the 1206L050 has 0.10 ohm min and 0.150 ohm R1max resistance, with 0.70 ohm listed as the maximum resistance after trip or reflow."
      }
    ],
    "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 drawing (page 4) shows a two-terminal chip with a top, bottom and side view, but it pr; The electrical table row for 1206L0501 lists Rmin 0.10, R1max 0.150 and 0.700 as consecutive columns",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 6,
        "cost_usd": 0.1609,
        "at": "2026-10-18T03:32:45"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588909033121701888",
        "pages": 6,
        "sha256": "e7684db822499dee",
        "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": "1206l050yr.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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "5e6dcbe286696143d35a8ea37d91eef4b54ff3d1bd7c2c2b4dedda83d3f8e203",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "1206l050yr-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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "095dc4ca7d919a80d5d04f92c4b71a353e67c23bea70b61a201522e7e9a4eb8a",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Littelfuse",
      "Package": "1206",
      "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": "e7684db822499deed0d4cd78a519d79fc09dba208d531c4852e10f7b1e06ffe7"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "e7684db822499deed0d4cd78a519d79fc09dba208d531c4852e10f7b1e06ffe7",
      "rows": [
        {
          "name": "Minimum resistance in initial (un-soldered) state",
          "symbol": "R min",
          "kind": "electrical",
          "unit": "Ω",
          "min": 0.15,
          "typ": null,
          "max": null,
          "conditions": "Initial un-soldered state",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Maximum resistance at 20°C after trip or reflow",
          "symbol": "R 1max",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 0.7,
          "conditions": "20°C, measured one hour after tripping or reflow soldering of 260°C for 20 sec",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Hold current",
          "symbol": "I hold",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "20°C still air; maximum current device passes without tripping",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Trip current",
          "symbol": "I trip",
          "kind": "electrical",
          "unit": "A",
          "min": 1,
          "typ": null,
          "max": null,
          "conditions": "20°C still air; minimum current at which device trips",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Maximum voltage",
          "symbol": "V max",
          "kind": "absolute_maximum",
          "unit": "Vdc",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "Maximum voltage device withstands without damage at rated current (I max)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Maximum fault current",
          "symbol": "I max",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "Maximum fault current device withstands without damage at rated voltage (Vmax)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Maximum time to trip",
          "symbol": "",
          "kind": "electrical",
          "unit": "s",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "At 8.00 A",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Hold current vs ambient temperature",
          "symbol": "I hold",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.71,
          "conditions": "Ambient -40°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Hold current vs ambient temperature",
          "symbol": "I hold",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.64,
          "conditions": "Ambient -20°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Hold current vs ambient temperature",
          "symbol": "I hold",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.57,
          "conditions": "Ambient 0°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Hold current vs ambient temperature",
          "symbol": "I hold",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "Ambient 20°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Hold current vs ambient temperature",
          "symbol": "I hold",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.42,
          "conditions": "Ambient 40°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Hold current vs ambient temperature",
          "symbol": "I hold",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.39,
          "conditions": "Ambient 50°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Hold current vs ambient temperature",
          "symbol": "I hold",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.35,
          "conditions": "Ambient 60°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Hold current vs ambient temperature",
          "symbol": "I hold",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.31,
          "conditions": "Ambient 70°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Hold current vs ambient temperature",
          "symbol": "I hold",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.25,
          "conditions": "Ambient 85°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Passive aging resistance change",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "Passive aging +85°C, 1000 hours; typical resistance change",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Humidity aging resistance change",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "Humidity aging +85°C, 85% R.H., 1000 hours; typical resistance change",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating/storage temperature",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "Operating/storage",
          "source_page": 3,
          "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": 3,
          "source": "datasheet"
        },
        {
          "name": "Preheat temperature",
          "symbol": "Ts",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": 150,
          "typ": null,
          "max": 200,
          "conditions": "Pb-free reflow preheat",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Preheat time",
          "symbol": "ts",
          "kind": "timing",
          "unit": "s",
          "min": 60,
          "typ": null,
          "max": 180,
          "conditions": "Pb-free reflow, preheat from Ts(min) to Ts(max)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Time above liquidus",
          "symbol": "tL",
          "kind": "timing",
          "unit": "s",
          "min": 60,
          "typ": null,
          "max": 150,
          "conditions": "Pb-free reflow, above TL 217°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Time within 5°C of peak temperature",
          "symbol": "tp",
          "kind": "timing",
          "unit": "s",
          "min": 20,
          "typ": null,
          "max": 40,
          "conditions": "Pb-free reflow",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Average ramp-up rate (TS(max) to TP)",
          "symbol": "",
          "kind": "timing",
          "unit": "°C/second",
          "min": null,
          "typ": null,
          "max": 3,
          "conditions": "Pb-free reflow, maximum",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ramp-down rate",
          "symbol": "",
          "kind": "timing",
          "unit": "°C/second",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "Pb-free reflow, maximum",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Time 25°C to peak temperature",
          "symbol": "",
          "kind": "timing",
          "unit": "minutes",
          "min": null,
          "typ": null,
          "max": 8,
          "conditions": "Pb-free reflow, maximum",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power dissipated in tripped state",
          "symbol": "Pd",
          "kind": "electrical",
          "unit": "W",
          "min": null,
          "typ": 0.6,
          "max": null,
          "conditions": "Tripped state, 20°C still air",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Trip-time reference temperature liquidus",
          "symbol": "TL",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": null,
          "typ": 217,
          "max": null,
          "conditions": "Pb-free reflow, time maintained above TL",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal shock resistance change",
          "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": 3,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "1206l050yr"
  ],
  "discovery_pitch": "1206L050YR (Littelfuse) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
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    "1206l050yr.kicad_mod",
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    "1206l050yr.step",
    "1206l050yr.lbr",
    "docs/hero.png",
    "docs/1206l050yr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
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    "1206l050yr-hero.overlay.json",
    "1206l050yr-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}