main
Ray Set visibility: public 308e0da 21d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "cd143a-sr3-3",
  "title": "CD143A-SR3.3",
  "brief": "BOURNS ESD And Surge Protection (TVS/ESD), SOT-143. 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",
    "circuit protection",
    "cd143a-sr3.3",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "CD143A-SR3.3",
    "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/8555352046760665088",
    "parts": {
      "symbol": "cd143a-sr3-3.kicad_sym",
      "footprint": "cd143a-sr3-3.kicad_mod",
      "model_3d": "cd143a-sr3-3-hero.glb",
      "model_3d_plain": "cd143a-sr3-3-etched.glb",
      "model_3d_step": "cd143a-sr3-3-etched.step",
      "model_3d_step_plain": "cd143a-sr3-3.step",
      "lbr": "cd143a-sr3-3.lbr"
    },
    "distributor_links": {
      "lcsc": "C3705831"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T20:13:23Z",
      "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 for the device; the operating supply is specified as Vdd - Gnd, and all DC I/O voltages are referenced to Gnd (Gnd -0.5 V minimum on I/O pins)."
      },
      {
        "number": "2",
        "name": "I/O",
        "type": "bidirectional",
        "description": "ESD-protected data line; DC voltage at any I/O pin must stay between (Gnd -0.5) V and (Vdd +0.5) V, and the line withstands ±30 kV air/contact per IEC 61000-4-2."
      },
      {
        "number": "3",
        "name": "I/O",
        "type": "bidirectional",
        "description": "ESD-protected data line; DC voltage at any I/O pin must stay between (Gnd -0.5) V and (Vdd +0.5) V, and the line withstands ±30 kV air/contact per IEC 61000-4-2."
      },
      {
        "number": "4",
        "name": "Vdd",
        "type": "power_in",
        "description": "Positive supply pin; operating supply voltage (Vdd - Gnd) is rated 3.8 V maximum."
      }
    ],
    "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: The datasheet's pin diagram text is scrambled in extraction (labels 'GND 1', 'I/O', 'Vdd', '2 I/O', ; The datasheet does not explicitly state that pin 1 is GND and pin 4 is Vdd in a single clean sentenc"
        ],
        "pages_sent": 5,
        "cost_usd": 0.0622,
        "at": "2026-10-17T20:11:08"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8555352046760665088",
        "pages": 5,
        "sha256": "cf77b0aa0614565c",
        "source_tier": "lcsc"
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      "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"
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    "models_3d": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          2.9,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b35b433c0dc71ac416a9c731e744d2e0610f82ebe97275830f0e17cdcbe44512",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cd143a-sr3-3-etched.step",
        "role": "eda",
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        "centre_offset_mm": 0,
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        "sha256": "39299b89c0bc2d76bb96255d7469fbdb3fb53b45f96a696296667277af211804",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "BOURNS",
      "Package": "SOT-143",
      "Category": "Circuit Protection",
      "Pins": "4"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "cf77b0aa0614565c23e64933be35250512e1b5494628beccf1b35e40bf86698f",
      "rows": [
        {
          "name": "Peak Pulse Power",
          "symbol": "PPP",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "tp = 8/20 µs",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Peak Pulse Current",
          "symbol": "IPP",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 12,
          "conditions": "tp = 8/20 µs",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating Supply Voltage (Vdd - Gnd)",
          "symbol": "Vdc",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 3.8,
          "conditions": "Vdd - Gnd",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "ESD Protection per IEC 61000-4-2 (Air, Contact)",
          "symbol": "Vesd",
          "kind": "absolute_maximum",
          "unit": "kV",
          "min": -30,
          "typ": null,
          "max": 30,
          "conditions": "IEC 61000-4-2, Air, Contact",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Breakdown Voltage Minimum",
          "symbol": "VBR",
          "kind": "electrical",
          "unit": "V",
          "min": 4.5,
          "typ": null,
          "max": null,
          "conditions": "@ 1 mA",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Working Peak Voltage",
          "symbol": "VWM",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 3.3,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Clamping Voltage Maximum",
          "symbol": "VC",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 7,
          "conditions": "@ IP = 1 A",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Clamping Voltage Maximum",
          "symbol": "VC",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 8.2,
          "conditions": "@ IP = 10 A",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Reverse Leakage Current Maximum",
          "symbol": "IL",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "@ VWM",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Forward Voltage Maximum",
          "symbol": "Vf",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "@ 15 mA, from Pin 1 to Pin 4",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Leakage Current",
          "symbol": "ID",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "@ VWM",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Capacitance Typical",
          "symbol": "CJ",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 4.5,
          "max": null,
          "conditions": "@ 0 V, 1 MHz",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "CD143A-SR3.3 (BOURNS) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}