CD143A-SR05

{
  "slug": "cd143a-sr05",
  "version": "0.1.0",
  "type": "component",
  "description": "BOURNS ESD And Surge Protection (TVS/ESD), SOT-143. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "circuit protection",
    "cd143a-sr05",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cd143a-sr05.kicad_sym",
    "cd143a-sr05.kicad_mod",
    "cd143a-sr05.glb",
    "cd143a-sr05.step",
    "cd143a-sr05.lbr",
    "docs/hero.png",
    "docs/cd143a-sr05-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cd143a-sr05-hero.glb",
    "cd143a-sr05-hero.overlay.json",
    "cd143a-sr05-etched.glb"
  ],
  "component": {
    "mpn": "CD143A-SR05",
    "manufacturer": "BOURNS",
    "package": "SOT-143",
    "pin_count": 4,
    "category": "Circuit Protection",
    "subcategory": "ESD And Surge Protection (TVS/ESD)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589934191996395520",
    "parts": {
      "symbol": "cd143a-sr05.kicad_sym",
      "footprint": "cd143a-sr05.kicad_mod",
      "model_3d": "cd143a-sr05-hero.glb",
      "model_3d_plain": "cd143a-sr05-etched.glb",
      "model_3d_step": "cd143a-sr05-etched.step",
      "model_3d_step_plain": "cd143a-sr05.step",
      "lbr": "cd143a-sr05.lbr"
    },
    "distributor_links": {
      "lcsc": "C840639"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T14:30:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin; the datasheet states clamping voltage is measured from Pin 4 to Pin 1 and that GND is connected to ground."
      },
      {
        "number": "2",
        "name": "I/O",
        "type": "bidirectional",
        "description": "Protected data line, with steering diodes to GND (Pin 1) and to REF/+VCC (Pin 4); capacitance is 10 pF maximum per data line at 0 V, 1 MHz."
      },
      {
        "number": "3",
        "name": "I/O",
        "type": "bidirectional",
        "description": "Protected data line, with steering diodes to GND (Pin 1) and to REF/+VCC (Pin 4); capacitance is 10 pF maximum per data line at 0 V, 1 MHz."
      },
      {
        "number": "4",
        "name": "REF",
        "type": "power_in",
        "description": "Connected to +VCC; the working peak voltage is 5.0 V for CD143A-SR05 and the clamping voltage is referenced from this pin to Pin 1."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin 4 is printed as REF in the block diagram and the notes state REF is connected to +VCC; the datas; The block diagram text is garbled in extraction ('1GND I/O REF 2 I/O 4 3'), so the exact assignment ; The datasheet gives no pin-level electrical limits beyond the clamping/capacitance notes, and no pin"
        ],
        "pages_sent": 5,
        "cost_usd": 0.0454,
        "at": "2026-10-18T14:28:12"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589934191996395520",
        "pages": 5,
        "sha256": "64b38a856f90bed8",
        "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": "cd143a-sr05.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": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cd143a-sr05-etched.step",
        "role": "eda",
        "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": "efd35dfd38e964d50a197b3d1576d3e66ecd2a71e5c4ac7e292232e8b78a9e98",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}