main
Ray Set visibility: public f103d2c 22d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "smd1812-300-6",
  "title": "SMD1812-300-6",
  "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": [
    "component",
    "circuit protection",
    "smd1812-300-6",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "SMD1812-300-6",
    "manufacturer": "hongjiacheng",
    "package": "1812",
    "pin_count": 2,
    "category": "Circuit Protection",
    "subcategory": "Resettable Fuses",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/9c77dd22043a50913836115d4b75a879.pdf",
    "parts": {
      "symbol": "smd1812-300-6.kicad_sym",
      "footprint": "smd1812-300-6.kicad_mod",
      "model_3d": "smd1812-300-6-hero.glb",
      "model_3d_plain": "smd1812-300-6-etched.glb",
      "model_3d_step": "smd1812-300-6-etched.step",
      "model_3d_step_plain": "smd1812-300-6.step",
      "lbr": "smd1812-300-6.lbr"
    },
    "distributor_links": {
      "lcsc": "C46641172"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T19:56:36Z",
      "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 PTC resettable fuse (Ihold 3.0A, Itrip 6.0A, Vmax 6V, Imax 40A); the device is symmetric and either terminal may be used."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "Second terminal of the non-polarized PTC resettable fuse, in series with terminal 1 (Ri min 0.01Ω, R1 max 0.05Ω)."
      }
    ],
    "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 shows a two-terminal SMD PTC with no pin numbers or names printed. The package drawing",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 6,
        "cost_usd": 0.1644,
        "at": "2026-10-17T19:51:12"
      },
      "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": [
      {
        "file": "smd1812-300-6.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": "a033fd2d3278c1dd046d33906723d2a8f04f36c6c837a343580b3593e5fabdc1",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "smd1812-300-6-etched.step",
        "role": "eda",
        "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": "3a56ecb8cec6dba53fd4b495f4bb4e9567653d64508f195666c04bd7df4365be",
        "checked": "2026-10-17",
        "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": 3,
          "conditions": "25℃ still air; maximum current passed without tripping (vocabulary definition)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Trip current (Itrip)",
          "symbol": "Itrip",
          "kind": "electrical",
          "unit": "A",
          "min": 6,
          "typ": null,
          "max": null,
          "conditions": "25℃ still air; minimum current at which device trips (vocabulary definition)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum voltage",
          "symbol": "Vmax",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "At rated current (Imax)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum fault current",
          "symbol": "Imax",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "At rated voltage (Vmax)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power dissipated in tripped state",
          "symbol": "Pd",
          "kind": "electrical",
          "unit": "W",
          "min": null,
          "typ": 1.2,
          "max": null,
          "conditions": "Typical, tripped state, 25℃ still air",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Max. time-to-trip",
          "symbol": "",
          "kind": "timing",
          "unit": "s",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "Max. column value 8.0 A as printed in table row",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Minimum resistance, initial (un-soldered) state",
          "symbol": "Ri",
          "kind": "electrical",
          "unit": "Ω",
          "min": 0.01,
          "typ": null,
          "max": null,
          "conditions": "Initial un-soldered state, Ta=25℃",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum resistance after trip or reflow",
          "symbol": "R1",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 0.05,
          "conditions": "25℃, measured one hour after tripping or reflow soldering at 260℃ for 20 sec",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating / storage temperature",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "Environmental specification for SMD1812 series",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum device surface temperature in tripped state",
          "symbol": "",
          "kind": "thermal",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "Tripped state",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Preheat temperature TS(min)",
          "symbol": "TS(min)",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "Pb-free reflow profile; printed as +150℃ (min of preheat band)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Preheat temperature TS(max)",
          "symbol": "TS(max)",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "Pb-free reflow profile",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Preheat time tS",
          "symbol": "tS",
          "kind": "recommended_operating",
          "unit": "s",
          "min": 60,
          "typ": null,
          "max": 180,
          "conditions": "Pb-free reflow profile, TS(min) to TS(max)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Liquidus temperature TL",
          "symbol": "TL",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 217,
          "conditions": "Pb-free reflow profile",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Time above liquidus tL",
          "symbol": "tL",
          "kind": "recommended_operating",
          "unit": "s",
          "min": 60,
          "typ": null,
          "max": 150,
          "conditions": "Pb-free reflow profile",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Peak temperature TP",
          "symbol": "TP",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Pb-free reflow; printed +260(+0/-5)℃; do not exceed +260℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Time within 5℃ of peak temperature tP",
          "symbol": "tP",
          "kind": "recommended_operating",
          "unit": "s",
          "min": 20,
          "typ": null,
          "max": 40,
          "conditions": "Pb-free reflow profile",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Ramp-up rate",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃/s",
          "min": null,
          "typ": null,
          "max": 3,
          "conditions": "TS(max) to TL and average ramp from TL to peak",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Ramp-down rate",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃/s",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "Peak to end of reflow",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Time 25℃ to peak temperature",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "min",
          "min": null,
          "typ": null,
          "max": 8,
          "conditions": "25℃ to peak temperature",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "smd1812-300-6"
  ],
  "discovery_pitch": "SMD1812-300-6 (hongjiacheng) 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",
    "smd1812-300-6.kicad_sym",
    "smd1812-300-6.kicad_mod",
    "smd1812-300-6.glb",
    "smd1812-300-6.step",
    "smd1812-300-6.lbr",
    "docs/hero.png",
    "docs/smd1812-300-6-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "smd1812-300-6-hero.glb",
    "smd1812-300-6-hero.overlay.json",
    "smd1812-300-6-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}