0501020.WR1

{
  "schema_version": 1,
  "type": "component",
  "slug": "0501020-wr1",
  "title": "0501020.WR1",
  "brief": "Littelfuse Disposable 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",
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    "mpn": "0501020.WR1",
    "manufacturer": "Littelfuse",
    "package": "1206",
    "pin_count": 2,
    "category": "Circuit Protection",
    "subcategory": "Disposable Fuses",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588910191966900224",
    "parts": {
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      "footprint": "0501020-wr1.kicad_mod",
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      "lbr": "0501020-wr1.lbr"
    },
    "distributor_links": {
      "lcsc": "C207007"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T00:35:15Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
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    },
    "pins": [
      {
        "number": "1",
        "name": "1",
        "type": "passive",
        "description": "One of two Ag/Ni/Sn end terminations of the fuse, interchangeable with the other, rated 32 V DC with 150 A DC interrupting rating (10 A to 20 A ratings)."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "The other of two Ag/Ni/Sn end terminations of the fuse, interchangeable with the first, rated 32 V DC with 150 A DC interrupting rating (10 A to 20 A ratings)."
      }
    ],
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
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        "cost_usd": 0.1061,
        "at": "2026-10-18T00:32:58"
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        "pages": 3,
        "sha256": "15c363790431c053",
        "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
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
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        "sha256": "5e6dcbe286696143d35a8ea37d91eef4b54ff3d1bd7c2c2b4dedda83d3f8e203",
        "checked": "2026-10-18",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Littelfuse",
      "Package": "1206",
      "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": "15c363790431c053d76f4e5166d69f123c1c5de73d13991d073224dc22278b7d"
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    "characteristics": {
      "version": 1,
      "source": "datasheet",
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      "rows": [
        {
          "name": "Max. Voltage Rating",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 32,
          "conditions": "",
          "source_page": 1,
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        },
        {
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          "symbol": "",
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          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "@ 32 VDC; DC interrupting rating tested at rated voltage with time constant < 0.5 msec",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Opening time at 100% of ampere rating (4 hours minimum)",
          "symbol": "",
          "kind": "timing",
          "unit": "Hours",
          "min": 4,
          "typ": null,
          "max": null,
          "conditions": "10A–20A; at 25ºC",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Opening time at 350% of ampere rating (5 seconds maximum)",
          "symbol": "",
          "kind": "timing",
          "unit": "Seconds",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "10A–20A; at 25ºC",
          "source_page": 1,
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        },
        {
          "name": "Operating temperature",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "ºC",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "Printed as Operating Temperature from -55ºC to +150ºC",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Continuous operation current (recommended maximum)",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 80,
          "conditions": "Percent of rated current; recommended continuous operation, no more than 80% rated current (standard 20% re-rating also applies)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Nominal Resistance (20A)",
          "symbol": "",
          "kind": "electrical",
          "unit": "Ohms",
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          "typ": 0.00194,
          "max": null,
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          "source_page": 1,
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        },
        {
          "name": "Nominal Melting I2T (20A)",
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          "kind": "electrical",
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          "typ": 86.36,
          "max": null,
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          "source_page": 1,
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        },
        {
          "name": "Nominal Voltage Drop At Rated Current (20A)",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.05888,
          "max": null,
          "conditions": "Measured at rated current after temperature has stabilized, fuse mounted on board with 3-oz Cu trace",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Nominal Power Dissipation At Rated Current (20A)",
          "symbol": "",
          "kind": "electrical",
          "unit": "W",
          "min": null,
          "typ": 1.1776,
          "max": null,
          "conditions": "At rated current",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Peak reflow temperature (Pb-free)",
          "symbol": "TP",
          "kind": "thermal",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Printed as 260+0/-5 °C peak temperature; do not exceed 260°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Wave soldering temperature",
          "symbol": "",
          "kind": "thermal",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Wave soldering 260°C, 10 seconds max.",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_triggers": [
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  "discovery_pitch": "0501020.WR1 (Littelfuse) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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