MSR12A1R004F2

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  "title": "MSR12A1R004F2",
  "brief": "prosemi Current Sense Resistors / Shunt Resistors, 1206. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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    "category": "Resistors",
    "subcategory": "Current Sense Resistors / Shunt Resistors",
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      "lcsc": "C21261097"
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      "source": "Component Ocean /api/assign-pns",
      "digikey": {
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        "status": "no match"
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      "mouser": {
        "pn": null,
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    "pins": [
      {
        "number": "1",
        "name": "1",
        "type": "passive",
        "description": "First terminal of the 2-terminal 4 mΩ (R004) ±1% metal alloy chip resistor, rated 1 W at 70°C, with current rating (P/R)^1/2 and operation from -55°C to +150°C."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "Second terminal of the 2-terminal 4 mΩ (R004) ±1% metal alloy chip resistor, rated 1 W at 70°C, with a recommended solder pad width of 1.00 mm (a), 1.85 mm (b) and 1.84 mm (c)."
      }
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet never numbers the terminals. Part-number field [3]=A means 2 terminals, and the drawin; The datasheet gives pad dimensions (a, b, c) but no drawing labels that I could map to the pads, so ",
          "vision extraction: provenance cannot be text-verified; needs consensus"
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        "cost_usd": 0.1773,
        "at": "2026-11-07T03:46:10"
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        "sha256": "216066e52aa868f6",
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      "cad": "KiCad official (CC-BY-SA 4.0)",
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        "total": 2,
        "described": 2,
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        "refuses_to_fabricate": true
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
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        "checked": "2026-11-07",
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  "metadata": {
    "specs": {
      "Manufacturer": "prosemi",
      "Package": "1206",
      "Category": "Resistors",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
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        {
          "name": "Resistance tolerance (part-number code F)",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "Code F = ±1% per part-numbering table",
          "source_page": 1,
          "source": "datasheet"
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        {
          "name": "Temperature coefficient of resistance",
          "symbol": "TCR",
          "kind": "temperature_coefficient",
          "unit": "ppm/℃",
          "min": -75,
          "typ": null,
          "max": 75,
          "conditions": "MSR12A, resistance range 1.5~4 mΩ; measured per MIL-STD-202 Method 304 (room temp to 125℃)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operation temperature range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "Operation temperature range",
          "source_page": 1,
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        },
        {
          "name": "Rated power",
          "symbol": "P",
          "kind": "electrical",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "Power rating at 70℃ (MSR12A); derate above 70℃ per curve",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Nominal resistance",
          "symbol": "R",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 4,
          "max": null,
          "conditions": "Part-number resistance code R004; range 1.5~4 mΩ for MSR12A",
          "source_page": 1,
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        },
        {
          "name": "Short time overload resistance change",
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          "kind": "electrical",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "5 s overload at 4× rated power (1.5≤R≤10 mΩ)",
          "source_page": 5,
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        },
        {
          "name": "Resistance to soldering heat resistance change",
          "symbol": "ΔR",
          "kind": "electrical",
          "unit": "%",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "260℃±5℃, 12 s ±0.5 s",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Temperature cycling resistance change",
          "symbol": "ΔR",
          "kind": "electrical",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "-55℃ (15 min)/+150℃ (15 min), 300 cycles",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low temperature storage resistance change",
          "symbol": "ΔR",
          "kind": "electrical",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "-55℃ for 1000 hours, no power",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "High temperature storage resistance change",
          "symbol": "ΔR",
          "kind": "electrical",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "150℃ for 1000 hours, no power",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Bias humidity resistance change",
          "symbol": "ΔR",
          "kind": "electrical",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "+85℃, 85% RH, 10% bias, 1000 hours; applies to 1.5~10 mΩ",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Vibration resistance change",
          "symbol": "ΔR",
          "kind": "electrical",
          "unit": "%",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "5 g's for 20 minutes, 12 cycles each of 3 orientations, 10 Hz–2000 Hz",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Operational life resistance change",
          "symbol": "ΔR",
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          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "70℃±2℃, 1000 hours, rated power 1.5 h ON / 0.5 h OFF; applies to 1.5~9 mΩ",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Moisture resistance resistance change",
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          "unit": "%",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "MIL-STD-202 Method 106, no power, 7b not required",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reflow peak temperature",
          "symbol": "TP",
          "kind": "thermal",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Pb-free reflow; time within 5℃ of peak 20–40 s",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Hand soldering temperature",
          "symbol": "",
          "kind": "thermal",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 350,
          "conditions": "Hand soldering, 5 seconds max.",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "Storage, must be controlled less than 40℃",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Storage relative humidity",
          "symbol": "R.H.",
          "kind": "recommended_operating",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 75,
          "conditions": "Storage, must be controlled less than 75%",
          "source_page": 7,
          "source": "datasheet"
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