main
Ray Set visibility: public 4016177
{
  "schema_version": 1,
  "type": "component",
  "slug": "lr123wf220mt4e",
  "title": "LR123WF220MT4E",
  "brief": "UNI ROYAL Uniroyal Elec Current Sense Resistors / Shunt Resistors, 2512. 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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    "resistors",
    "lr123wf220mt4e",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LR123WF220MT4E",
    "manufacturer": "UNI ROYAL Uniroyal Elec",
    "package": "2512",
    "pin_count": 2,
    "category": "Resistors",
    "subcategory": "Current Sense Resistors / Shunt Resistors",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603235367415783424",
    "parts": {
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      "footprint": "lr123wf220mt4e.kicad_mod",
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      "model_3d_plain": "lr123wf220mt4e-etched.glb",
      "model_3d_step": "lr123wf220mt4e-etched.step",
      "model_3d_step_plain": "lr123wf220mt4e.step",
      "lbr": "lr123wf220mt4e.lbr"
    },
    "distributor_links": {
      "lcsc": "C19633801"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T08:32:56Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1",
        "type": "passive",
        "description": "First terminal of the LR12 (2512) metal strip chip resistor; the part is non-polarized and this LR123WF220MT4E is 3W, ±1%, with 220M decoding to 22×10^-4 = 2.2mΩ."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "Second terminal of the LR12 (2512) metal strip chip resistor; the part is non-polarized and interchangeable with the first terminal, with the recommended land pattern for 3mΩ~350mΩ given as a=2.30, b=3.68, i=3.15mm and for 1mΩ/2mΩ as a=3.20, b=3.68, i=1.35mm."
      }
    ],
    "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 drawings show a two-terminal chip resistor with no printed pin numbers. Pins 1 and 2 a; The land pattern dimensions depend on resistance value. The datasheet gives two sets: 1mΩ/2mΩ and 3m",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 6,
        "cost_usd": 0.1585,
        "at": "2026-10-27T08:32:47"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603235367415783424",
        "pages": 6,
        "sha256": "697e24f2047069dc",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 2,
        "described": 2,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.3,
          3.2,
          0.6
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "76b2052a3c120193de7cdc0af99157b6f375e9a4af7721e3e3d012968c877f27",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lr123wf220mt4e-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "zmin_mm": 0,
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        "sha256": "da93f5856f73981da1fd45feb0feecb117f8bcc854b2ecb57ad9650f565f43b1",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "UNI ROYAL Uniroyal Elec",
      "Package": "2512",
      "Category": "Resistors",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "697e24f2047069dc9d8094688abb5f7ac53590c48ef944d1280a5a558ac29895",
      "rows": [
        {
          "name": "Resistance tolerance",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Temperature coefficient of resistance",
          "symbol": "TCR",
          "kind": "temperature_coefficient",
          "unit": "PPM/℃",
          "min": -50,
          "typ": null,
          "max": 50,
          "conditions": "t1=+25°C, t2=125°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Short-time overload resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "LR12-3W: 4 times rated power, 5 seconds",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Load life resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "1000 hours at rated or max working current (whichever less), 1.5 h ON / 0.5 h OFF, 70±2°C ambient",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High temperature exposure resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "155±2°C for 1000 H (MIL-STD-202 108A)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Biased humidity resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "1000 hours 85°C/85%RH, 10% of operating power; measured at 24±4 hours after test",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Rapid change of temperature resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "30 min at -55°C and 30 min at 155°C; 100 cycles",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Terminal bending resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "2 mm, 10 s",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Resistance to solder heat resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "260±5°C held 10±1 seconds",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Solderability coverage",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": 95,
          "typ": null,
          "max": null,
          "conditions": "Solder temperature 245±3°C; dwell 2~3 seconds; new, smooth, clean surface",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Dielectric withstanding limit surge current",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "Applied 500 VAC for 1 minute",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature (recommended)",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": 15,
          "typ": null,
          "max": 35,
          "conditions": "Warehouse storage recommended by UNI-ROYAL",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Storage humidity (recommended)",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "%RH",
          "min": 25,
          "typ": null,
          "max": 75,
          "conditions": "Warehouse storage recommended by UNI-ROYAL",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Allowed reflow times",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "times",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "Lead-free reflow profile",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Peak reflow temperature (recommended)",
          "symbol": "Tp",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": null,
          "typ": 260,
          "max": null,
          "conditions": "Lead-free reflow profile; time within +0/−5℃ of actual peak 10 seconds",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Rated power",
          "symbol": "P",
          "kind": "recommended_operating",
          "unit": "W",
          "min": null,
          "typ": 3,
          "max": null,
          "conditions": "Continuous load at ambient 70°C; derate above 70°C per Figure 1",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
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  "discovery_triggers": [
    "lr123wf220mt4e"
  ],
  "discovery_pitch": "LR123WF220MT4E (UNI ROYAL Uniroyal Elec) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
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  "visibility": {
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}