SR70.TCT

{
  "schema_version": 1,
  "type": "component",
  "slug": "sr70-tct",
  "title": "SR70.TCT",
  "brief": "SEMTECH 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",
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    "circuit protection",
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    "extractor-text"
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  "component": {
    "mpn": "SR70.TCT",
    "manufacturer": "SEMTECH",
    "package": "SOT-143",
    "pin_count": 4,
    "category": "Circuit Protection",
    "subcategory": "ESD And Surge Protection (TVS/ESD)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588913508771225600",
    "parts": {
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      "footprint": "sr70-tct.kicad_mod",
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      "model_3d_step_plain": "sr70-tct.step",
      "lbr": "sr70-tct.lbr"
    },
    "distributor_links": {
      "lcsc": "C512378",
      "digikey": "SR70TR-ND",
      "mouser": "947-SR70.TCT"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T07:50:09Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "SR70TR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "947-SR70.TCT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "REF1",
        "type": "power_in",
        "description": "Negative reference (ground) for the steering diodes; should be connected directly to a ground plane with the shortest possible path to minimize parasitic inductance."
      },
      {
        "number": "2",
        "name": "I/O1",
        "type": "bidirectional",
        "description": "Data line 1 protected by steering diodes that clamp transients to REF1 or REF2, with a maximum clamping voltage of one diode drop (VF) above the reference and typical line capacitance of 5pF."
      },
      {
        "number": "3",
        "name": "I/O2",
        "type": "bidirectional",
        "description": "Data line 2 protected by steering diodes that clamp transients to REF1 or REF2, with a maximum clamping voltage of one diode drop (VF) above the reference and typical line capacitance of 5pF."
      },
      {
        "number": "4",
        "name": "REF2",
        "type": "power_in",
        "description": "Positive reference, connected either to the supply rail (VCC) or to an external TVS diode, above which the steering diodes conduct when the protected line exceeds it by one diode drop."
      }
    ],
    "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 ordering table on page 6 is garbled in the text extraction, so the exact lead-finish/tape-and-re; Pin types are inferred: pins 2 and 3 are classed bidirectional because the steering diodes conduct i",
          "1/4 pin names appear NOWHERE in the datasheet text: ['2:I/O1@p4']"
        ],
        "pages_sent": 6,
        "cost_usd": 0.0264,
        "at": "2026-10-19T07:49:54"
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      "datasheet": {
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        "pages": 6,
        "sha256": "a18fa904634d860b",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 4,
        "described": 4,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.3,
          2.9,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b35b433c0dc71ac416a9c731e744d2e0610f82ebe97275830f0e17cdcbe44512",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
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        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "SEMTECH",
      "Package": "SOT-143",
      "Category": "Circuit Protection",
      "Pins": "4"
    },
    "appearance": {
      "contacts": {
        "quote": "Matte Tin Lead Finish Matte tin has become the industry standard lead-free",
        "page": 4,
        "doc": "ds.pdf",
        "plating": "tin"
      },
      "version": 1,
      "datasheet_sha256": "a18fa904634d860b43335a4786115fb033714e66b825ea465bd583107d94f32f"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "a18fa904634d860b43335a4786115fb033714e66b825ea465bd583107d94f32f",
      "rows": [
        {
          "name": "Reverse Breakdown Voltage",
          "symbol": "VBR",
          "kind": "electrical",
          "unit": "V",
          "min": 58,
          "typ": null,
          "max": null,
          "conditions": "IT = 50µA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reverse Leakage Current",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "VRWM = 70V, T=25°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Peak Reverse Stand-Off Voltage",
          "symbol": "VRWM",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 70,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Peak Pulse Current",
          "symbol": "IPP",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 24,
          "conditions": "tp = 8/20µs",
          "source_page": 2,
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        },
        {
          "name": "Rectifier Repetitive Peak Reverse Voltage",
          "symbol": "VRRM",
          "kind": "absolute_maximum",
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          "min": null,
          "typ": null,
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          "conditions": "",
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        },
        {
          "name": "ESD per IEC 61000-4-2 (Air)",
          "symbol": "VESD",
          "kind": "absolute_maximum",
          "unit": "kV",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "ESD per IEC 61000-4-2 (Air)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
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          "typ": null,
          "max": 8,
          "conditions": "ESD per IEC 61000-4-2 (Contact)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "SR70.TCT (SEMTECH) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}