JER2512F2R250

{
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  "type": "component",
  "slug": "jer2512f2r250",
  "title": "JER2512F2R250",
  "brief": "jieerrui 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",
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  "component": {
    "mpn": "JER2512F2R250",
    "manufacturer": "jieerrui",
    "package": "2512",
    "pin_count": 2,
    "category": "Resistors",
    "subcategory": "Current Sense Resistors / Shunt Resistors",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/02ae4b20613551dea68a63964573e262.pdf",
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      "lbr": "jer2512f2r250.lbr"
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    "distributor_links": {
      "lcsc": "C49164924"
    },
    "distributor_check": {
      "checked_at": "2026-10-24T11:09:46Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1",
        "type": "passive",
        "description": "Resistor terminal (small electrode, E = 0.90±0.20 mm on the 6.40×3.20 mm 2512 body); the 250 mΩ ±1% element is rated 2 W, derated above 70 °C, over -55 °C to +170 °C."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "Second resistor terminal, interchangeable with pin 1 (non-polarized); recommended pad dimensions for 1 mΩ~500 mΩ 2512 are a=4.0, b=2.1, L=4.1 mm."
      }
    ],
    "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 draws a two-terminal chip resistor and prints no pin numbers. Pins 1 and 2 are assigne; The MPN has no 'L' suffix, which the datasheet uses to mark the large-electrode version, so I assume",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 7,
        "cost_usd": 0.187,
        "at": "2026-10-24T11:09:37"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/02ae4b20613551dea68a63964573e262.pdf",
        "pages": 7,
        "sha256": "6c0d359d39546b43",
        "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": [
          6.3,
          3.2,
          0.6
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "76b2052a3c120193de7cdc0af99157b6f375e9a4af7721e3e3d012968c877f27",
        "checked": "2026-10-24",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
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        "origin": "footprint origin = pad-pattern centre",
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        "sha256": "45e3c48f90813feb6947dd1782266e5989d769e04ce8673dd82c5ab309f90676",
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      }
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "jieerrui",
      "Package": "2512",
      "Category": "Resistors",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "6c0d359d39546b438f6821b7c709fdc469aca08e893a298c0d29b08863684997",
      "rows": [
        {
          "name": "Resistance tolerance",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "Tolerance code F = ±1% (MPN position 'F')",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Temperature coefficient of resistance",
          "symbol": "TCR",
          "kind": "temperature_coefficient",
          "unit": "ppm/℃",
          "min": -50,
          "typ": null,
          "max": 50,
          "conditions": "2512, resistance range 2mΩ~500mΩ: ±50 (this part 250mΩ)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Nominal resistance",
          "symbol": "R",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 250,
          "max": null,
          "conditions": "Marking code R250 = 250mΩ (0.25 Ω)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Rated power",
          "symbol": "P",
          "kind": "electrical",
          "unit": "W",
          "min": null,
          "typ": 2,
          "max": null,
          "conditions": "Power code '2' = 2W, 2512 size; load reduced above 70℃ ambient per derating curve",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Resistance range",
          "symbol": "R",
          "kind": "electrical",
          "unit": "mΩ",
          "min": 0.5,
          "typ": null,
          "max": 500,
          "conditions": "2512 resistance range 0.5mΩ~500mΩ",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Insulation resistance",
          "symbol": "",
          "kind": "electrical",
          "unit": "MΩ",
          "min": 100,
          "typ": null,
          "max": null,
          "conditions": "2512 row printed as >100MΩ",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 170,
          "conditions": "Operating temperature range -55℃ to +170℃",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Short time overload resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "5.0× rated power for 5 s (IEC60115-1 4.13)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Temperature cycling resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "JESD22 JA-104, -55℃/+125℃, 1000 cycles, measured 24±4 h after test",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "High temperature exposure resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "125℃, 1000 h (MIL-STD-202 108), measured 24±4 h after test",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Low temperature operation resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "-55℃, 45 min (IEC60115-1 4.23.4)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Biased humidity resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "10% of rated power, 85℃/85%RH, 1000 h (MIL-STD-202 103)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Operational life resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "70±2℃, rated current 1.5 h on / 0.5 h off, 1000 +48/-0 h (MIL-STD-202 108)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Vibration resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "5g, 20 min, 12 cycles, 10-2000 Hz (MIL-STD-202 204)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Resistance to solder heat resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "Solder bath 260±5℃, 10±1 s (IEC60115-1 4.18)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Terminal bending resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "2 mm deflection, 60 s (AEC-Q200-005)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Mechanical shock resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "100g, half sine, 6 ms (MIL-STD-202 213)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Terminal strength resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "Applied 17.7 N for 60±1 s (AEC-Q200-006)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Thermal shock resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "-55/+125℃, 300 cycles, devices mounted (MIL-STD-202 107)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "ESD resistance change",
          "symbol": "ΔR",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "AEC-Q200-002, 2 kV, 2 times at 1 s interval",
          "source_page": 7,
          "source": "datasheet"
        }
      ]
    }
  },
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  "author": {
    "name": "Ray"
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