MSR12A1R003F2

{
  "schema_version": 1,
  "type": "component",
  "slug": "msr12a1r003f2",
  "title": "MSR12A1R003F2",
  "brief": "prosemi Current Sense Resistors / Shunt Resistors, 1206. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "resistors",
    "msr12a1r003f2",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MSR12A1R003F2",
    "manufacturer": "prosemi",
    "package": "1206",
    "pin_count": 2,
    "category": "Resistors",
    "subcategory": "Current Sense Resistors / Shunt Resistors",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590921235662651392",
    "parts": {
      "symbol": "msr12a1r003f2.kicad_sym",
      "footprint": "msr12a1r003f2.kicad_mod",
      "model_3d": "msr12a1r003f2-hero.glb",
      "model_3d_plain": "msr12a1r003f2-etched.glb",
      "model_3d_step": "msr12a1r003f2-etched.step",
      "model_3d_step_plain": "msr12a1r003f2.step",
      "lbr": "msr12a1r003f2.lbr"
    },
    "distributor_links": {
      "lcsc": "C21261098"
    },
    "distributor_check": {
      "checked_at": "2026-11-07T04:00:43Z",
      "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 1 of the 2-terminal MSR12A (1206, 3.20 x 1.60 mm) 3 mΩ ±1% element, 1 W at 70°C, TCR ±75 ppm/°C, recommended solder pad a=1.00 mm, b=1.85 mm, c=1.84 mm."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "Resistor terminal 2 of the 2-terminal MSR12A (1206) 3 mΩ element, interchangeable with terminal 1, rated -55°C to +150°C, with a sensing trace routed to each pad per the recommended layout."
      }
    ],
    "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 says only that the MSR12A has 2 terminals (code A) and shows no pin numbers or polarit; The part number MSR12A1R003F2 decodes as 1206, 2 terminals, 1 W, 3 mΩ, ±1%, with marking. The pad ta",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 7,
        "cost_usd": 0.1811,
        "at": "2026-11-07T04:00:34"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590921235662651392",
        "pages": 7,
        "sha256": "216066e52aa868f6",
        "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": "msr12a1r003f2.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.2,
          1.6,
          0.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "f5d1ea5c47935091292bd1c6c698e0df88d3d4bbf92bf66b4c97e49df5be9ebc",
        "checked": "2026-11-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "msr12a1r003f2-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.2,
          1.6,
          0.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "09d7d16e7a71a38eeed3d24f9ce38a7487545bc7f8bfbbd18ba27920c6db5b43",
        "checked": "2026-11-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "prosemi",
      "Package": "1206",
      "Category": "Resistors",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "216066e52aa868f603db5604f8cd31b650d1c5c2ca17a2884bd19cdad64b93c1",
      "rows": [
        {
          "name": "Resistance tolerance (code F)",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "Part number code F = ±1%",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Temperature coefficient of resistance (TCR)",
          "symbol": "TCR",
          "kind": "temperature_coefficient",
          "unit": "ppm/℃",
          "min": -75,
          "typ": null,
          "max": 75,
          "conditions": "MSR12A; TCR=(R-R0)/R0(T2-T1)×10^6, T1 room temp, T2 125℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Power rating",
          "symbol": "P",
          "kind": "recommended_operating",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "Power rating at 70℃ (MSR12A, code 1 = 1W); derate above 70℃ per curve",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operation temperature range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "MSR series operation temperature range",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Resistance range",
          "symbol": "R",
          "kind": "electrical",
          "unit": "mΩ",
          "min": 1.5,
          "typ": null,
          "max": 4,
          "conditions": "MSR12A resistance range; this MPN R003 = 3 mΩ falls within it",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Resistance change, short time overload",
          "symbol": "ΔR",
          "kind": "electrical",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "5 s overload at 4 times rated power; 1206, 1.5≤R≤10 mΩ",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Resistance change, resistance to soldering heat",
          "symbol": "ΔR",
          "kind": "electrical",
          "unit": "%",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "260±5℃, 12±0.5 s",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Resistance change, temperature cycling",
          "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": "Resistance change, low temperature storage",
          "symbol": "ΔR",
          "kind": "electrical",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "-55℃, 1000 hours, no power",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Resistance change, high temperature storage",
          "symbol": "ΔR",
          "kind": "electrical",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "150℃, 1000 hours, no power",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Resistance change, bias humidity",
          "symbol": "ΔR",
          "kind": "electrical",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "+85℃, 85% RH, 10% bias, 1000 hours; 1.5~10 mΩ",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Resistance change, vibration",
          "symbol": "ΔR",
          "kind": "electrical",
          "unit": "%",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "5 g's, 20 min, 12 cycles each of 3 orientations, 10–2000 Hz",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Resistance change, operational life",
          "symbol": "ΔR",
          "kind": "electrical",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "70℃±2℃, 1000 hours, rated power 1.5 h ON / 0.5 h OFF; 1206, 1.5~9 mΩ",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Resistance change, moisture resistance",
          "symbol": "ΔR",
          "kind": "electrical",
          "unit": "%",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "MIL-STD-202 method 106, no power",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Nominal resistance",
          "symbol": "R",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 3,
          "max": null,
          "conditions": "Resistance code R003 = 3 mΩ (decimal location in ohms: R003 = 0.003 Ω)",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "msr12a1r003f2"
  ],
  "discovery_pitch": "MSR12A1R003F2 (prosemi) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "msr12a1r003f2.kicad_sym",
    "msr12a1r003f2.kicad_mod",
    "msr12a1r003f2.glb",
    "msr12a1r003f2.step",
    "msr12a1r003f2.lbr",
    "docs/hero.png",
    "docs/msr12a1r003f2-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "msr12a1r003f2-hero.glb",
    "msr12a1r003f2-hero.overlay.json",
    "msr12a1r003f2-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}