MSR05

{
  "slug": "msr05",
  "version": "0.1.0",
  "type": "component",
  "description": "MSKSEMI ESD Protection Devices, SOT-143. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "tvs-fuse-board level protection",
    "msr05",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "msr05.kicad_sym",
    "msr05.kicad_mod",
    "msr05.glb",
    "msr05.step",
    "msr05.lbr",
    "docs/hero.png",
    "docs/msr05-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "msr05-hero.glb",
    "msr05-hero.overlay.json"
  ],
  "component": {
    "mpn": "MSR05",
    "manufacturer": "MSKSEMI",
    "package": "SOT-143",
    "pin_count": 4,
    "category": "TVS/Fuse/Board Level Protection",
    "subcategory": "ESD Protection Devices",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/f43a7c86b98d2efd2282dafd3329224b.pdf",
    "parts": {
      "symbol": "msr05.kicad_sym",
      "footprint": "msr05.kicad_mod",
      "model_3d": "msr05-hero.glb",
      "model_3d_step": "msr05.step",
      "lbr": "msr05.lbr",
      "model_3d_plain": "msr05.glb"
    },
    "distributor_links": {
      "lcsc": "C2802268"
    },
    "distributor_check": {
      "checked_at": "2026-11-05T04:22:15Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground/return side of the internal TVS diode and steering diodes (zener connects pin 4 to pin 1 in the page 2 drawing), with ESD rated at ±30kV air and contact per IEC 61000-4-2."
      },
      {
        "number": "2",
        "name": "I/O",
        "type": "bidirectional",
        "description": "Protected line connected to a steering-diode pair, suited to USB 2.0 data lines, with a 5V working voltage (VRWM) and 1.2pF typical capacitance."
      },
      {
        "number": "3",
        "name": "I/O",
        "type": "bidirectional",
        "description": "Protected line connected to a steering-diode pair, suited to USB 2.0 data lines, with a 5V working voltage (VRWM) and 1.2pF typical capacitance."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive rail of the diode array connected to the TVS diode cathode, with a 5V working voltage (VRWM) and 6V breakdown voltage at 1mA."
      }
    ],
    "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 text names no pins. The assignment comes only from the SOT-143 pin-configuration drawi",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 5,
        "cost_usd": 0.1691,
        "at": "2026-11-05T04:22:10"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/f43a7c86b98d2efd2282dafd3329224b.pdf",
        "pages": 5,
        "sha256": "451dbdc0bd05afe8",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 4,
        "described": 4,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "msr05.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.3,
          2.9,
          1.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b35b433c0dc71ac416a9c731e744d2e0610f82ebe97275830f0e17cdcbe44512",
        "checked": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "SOT-143",
      "source_page": 4,
      "D": {
        "nom_mm": 2.9,
        "range_mm": [
          2.8,
          3.04
        ]
      },
      "E1": {
        "nom_mm": 1.3,
        "range_mm": [
          1.2,
          1.4
        ]
      },
      "E": {
        "nom_mm": 2.37,
        "range_mm": [
          2.1,
          2.64
        ]
      },
      "e": {
        "nom_mm": 1.92,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.01,
        "range_mm": [
          0.8,
          1.22
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "msr05.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}