SMD1812-050-33

{
  "schema_version": 1,
  "type": "component",
  "slug": "smd1812-050-33",
  "title": "SMD1812-050-33",
  "brief": "hongjiacheng Resettable Fuses, 1812. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "circuit protection",
    "smd1812-050-33",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "SMD1812-050-33",
    "manufacturer": "hongjiacheng",
    "package": "1812",
    "pin_count": 2,
    "category": "Circuit Protection",
    "subcategory": "Resettable Fuses",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/9c77dd22043a50913836115d4b75a879.pdf",
    "parts": {
      "symbol": "smd1812-050-33.kicad_sym",
      "footprint": "smd1812-050-33.kicad_mod",
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      "model_3d_step_plain": "smd1812-050-33.step",
      "lbr": "smd1812-050-33.lbr"
    },
    "distributor_links": {
      "lcsc": "C46641047"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T18:27:16Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1",
        "type": "passive",
        "description": "One terminal of the non-polarized resettable PTC fuse (Ihold 0.50 A, Itrip 1.0 A, Vmax 33 V, Imax 40 A), with a recommended pad 1.7±0.1 mm wide by 3.5±0.1 mm long."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "The other terminal of the non-polarized resettable PTC fuse, with the pads spaced 3.0±0.1 mm apart on the recommended layout."
      }
    ],
    "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 on page 5 shows two end terminals and two pads. It prints no pin numbers or na",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 6,
        "cost_usd": 0.181,
        "at": "2026-10-18T18:24:26"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/9c77dd22043a50913836115d4b75a879.pdf",
        "pages": 6,
        "sha256": "8ab1f213bc6d6cd2",
        "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": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          3.22,
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "085ace4f6cc6094e3881cd162363262667d27618bf9d68f3e2287a7f963804bc",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "smd1812-050-33-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "8d953098560f4a1646673afe9844540689053d7a898126bf46fb38712793d777",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "hongjiacheng",
      "Package": "1812",
      "Category": "Circuit Protection",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "8ab1f213bc6d6cd26c0d8a2c008bd9e06a9671801866a64a26b4365b4c28f0c8",
      "rows": [
        {
          "name": "Hold current (Ihold)",
          "symbol": "Ihold",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "Maximum current device will pass without tripping in 25℃ still air",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Trip current (Itrip)",
          "symbol": "Itrip",
          "kind": "electrical",
          "unit": "A",
          "min": 1,
          "typ": null,
          "max": null,
          "conditions": "Minimum current at which the device will trip in 25℃ still air",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum voltage (Vmax)",
          "symbol": "Vmax",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 33,
          "conditions": "Maximum voltage device can withstand without damage at rated current (Imax)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum fault current (Imax)",
          "symbol": "Imax",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "Maximum fault current device can withstand without damage at rated voltage (Vmax)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Typical power dissipation in tripped state (Pd typ)",
          "symbol": "Pd",
          "kind": "electrical",
          "unit": "W",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "Typical power dissipated from device when in the tripped state at 25℃ still air",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum time-to-trip",
          "symbol": "",
          "kind": "timing",
          "unit": "s",
          "min": null,
          "typ": null,
          "max": 8,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Minimum resistance in initial state (Ri min)",
          "symbol": "Ri",
          "kind": "electrical",
          "unit": "Ω",
          "min": 0.15,
          "typ": null,
          "max": null,
          "conditions": "Minimum resistance of device in initial (un-soldered) state",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum resistance at 25℃ after trip or reflow (R1 max)",
          "symbol": "R1",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 1.4,
          "conditions": "At 25℃, measured one hour after tripping or reflow soldering of 260℃ for 20 sec",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating / storage temperature",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "Operating / storage temperature",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum device surface temperature in tripped state",
          "symbol": "",
          "kind": "thermal",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "Maximum device surface temperature in tripped state",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Peak reflow temperature (TP)",
          "symbol": "TP",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Pb-free reflow; do not exceed +260℃",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
    "smd1812-050-33"
  ],
  "discovery_pitch": "SMD1812-050-33 (hongjiacheng) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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