043801.5WR

{
  "schema_version": 1,
  "type": "component",
  "slug": "043801-5wr",
  "title": "043801.5WR",
  "brief": "Littelfuse Disposable Fuses, 0603. 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",
    "043801.5wr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "043801.5WR",
    "manufacturer": "Littelfuse",
    "package": "0603",
    "pin_count": 2,
    "category": "Circuit Protection",
    "subcategory": "Disposable Fuses",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588899283348672512",
    "parts": {
      "symbol": "043801-5wr.kicad_sym",
      "footprint": "043801-5wr.kicad_mod",
      "model_3d": "043801-5wr-hero.glb",
      "model_3d_plain": "043801-5wr-etched.glb",
      "model_3d_step": "043801-5wr-etched.step",
      "model_3d_step_plain": "043801-5wr.step",
      "lbr": "043801-5wr.lbr"
    },
    "distributor_links": {
      "lcsc": "C126814",
      "digikey": "F2949TR-ND",
      "mouser": "576-043801.5WR"
    },
    "distributor_check": {
      "checked_at": "2026-10-20T21:30:45Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "F2949TR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "576-043801.5WR",
        "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": 3,
        "cost_usd": 0.0013,
        "at": "2026-10-20T21:24:50"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588899283348672512",
        "pages": 3,
        "sha256": "052a726ae5f412a4",
        "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": "043801-5wr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          1.6,
          0.8,
          0.45
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "2178c56deff687266eecad5e197b7ab2d230afae45def1320cff0ea839f46b49",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "043801-5wr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          1.6,
          0.8,
          0.45
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "199b1f706f8e6ad293229317d7995e28d55fe2090e959f423ef99a7fb44ce713",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Littelfuse",
      "Package": "0603",
      "Category": "Circuit Protection",
      "Pins": "2"
    },
    "appearance": {
      "contacts": {
        "quote": "Terminations: Ag / Ni / Sn (100% Lead-free) Element Cover Coating: Lead-free Glass",
        "page": 3,
        "doc": "ds.pdf",
        "plating": "tin"
      },
      "version": 1,
      "datasheet_sha256": "052a726ae5f412a4579263fb7e1eb6639d5b33eb6f46b75183d788a8bf6a812b"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "052a726ae5f412a4579263fb7e1eb6639d5b33eb6f46b75183d788a8bf6a812b",
      "rows": [
        {
          "name": "Opening time at 100% of ampere rating, 25ºC",
          "symbol": "",
          "kind": "electrical",
          "unit": "hours",
          "min": 4,
          "typ": null,
          "max": null,
          "conditions": "100% of ampere rating; opening time at 25ºC",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Opening time at 250% of ampere rating, 25ºC",
          "symbol": "",
          "kind": "electrical",
          "unit": "seconds",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "250% of ampere rating; opening time at 25ºC",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Max. Voltage Rating",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "VDC",
          "min": null,
          "typ": null,
          "max": 63,
          "conditions": "Amp code 01.5 (1.5 A) row",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Interrupting rating (DC)",
          "symbol": "",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "@ 63VDC",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Interrupting rating (AC)",
          "symbol": "",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "@ 32VAC",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Nominal Resistance",
          "symbol": "",
          "kind": "electrical",
          "unit": "Ohms",
          "min": null,
          "typ": 0.174,
          "max": null,
          "conditions": "Measured with < 10% rated current",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Nominal Melting I2t",
          "symbol": "",
          "kind": "electrical",
          "unit": "A2Sec.",
          "min": null,
          "typ": 0.0902,
          "max": null,
          "conditions": "Measured at 1 msec. opening time",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Nominal Voltage Drop At Rated Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.368,
          "max": null,
          "conditions": "At rated current after temperature has stabilized",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Nominal Power Dissipation At Rated Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "W",
          "min": null,
          "typ": 0.552,
          "max": null,
          "conditions": "At rated current",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "ºC",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Continuous operation current",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "% of rated current",
          "min": null,
          "typ": null,
          "max": 80,
          "conditions": "Continuous operation; no more than 80% rated current",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Pre-heat temperature Ts(min)",
          "symbol": "Ts(min)",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": 150,
          "typ": null,
          "max": null,
          "conditions": "Pb-free reflow pre-heat",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Pre-heat temperature Ts(max)",
          "symbol": "Ts(max)",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "Pb-free reflow pre-heat",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Pre-heat time (Min to Max)",
          "symbol": "ts",
          "kind": "recommended_operating",
          "unit": "seconds",
          "min": 60,
          "typ": null,
          "max": 180,
          "conditions": "Pb-free reflow pre-heat",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Average ramp-up rate (TL to peak)",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C/second",
          "min": null,
          "typ": null,
          "max": 3,
          "conditions": "Liquidus (TL) to peak",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "TS(max) to TL ramp-up rate",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C/second",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "TS(max) to TL",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Time above liquidus (tL)",
          "symbol": "tL",
          "kind": "recommended_operating",
          "unit": "seconds",
          "min": 60,
          "typ": null,
          "max": 150,
          "conditions": "Reflow, Pb-free",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Peak temperature (TP)",
          "symbol": "TP",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Pb-free reflow; printed as 260+0/-5 °C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Time within 5°C of actual peak temperature (tp)",
          "symbol": "tp",
          "kind": "recommended_operating",
          "unit": "seconds",
          "min": 10,
          "typ": null,
          "max": 30,
          "conditions": "Within 5°C of actual peak",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Ramp-down rate",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C/second",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "Reflow, Pb-free",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Time 25°C to peak temperature (TP)",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "minutes",
          "min": null,
          "typ": null,
          "max": 8,
          "conditions": "25°C to peak temperature",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum soldering temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Do not exceed",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Wave soldering temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Wave soldering",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Wave soldering time",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "seconds",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "Wave soldering",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "043801.5wr"
  ],
  "discovery_pitch": "043801.5WR (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": [
    "page.json",
    "README.md",
    "043801-5wr.kicad_sym",
    "043801-5wr.kicad_mod",
    "043801-5wr.glb",
    "043801-5wr.step",
    "043801-5wr.lbr",
    "docs/hero.png",
    "docs/043801-5wr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "043801-5wr-hero.glb",
    "043801-5wr-hero.overlay.json",
    "043801-5wr-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}