main
Ray Set visibility: public d56f378 11d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "smbj140a",
  "title": "SMBJ140A",
  "brief": "FUXINSEMI ESD And Surge Protection (TVS/ESD), DO-214AA(SMB). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "circuit protection",
    "smbj140a",
    "factory-2.0.0",
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  "component": {
    "mpn": "SMBJ140A",
    "manufacturer": "FUXINSEMI",
    "package": "DO-214AA(SMB)",
    "pin_count": 2,
    "category": "Circuit Protection",
    "subcategory": "ESD And Surge Protection (TVS/ESD)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/1e7f53c3711b1941161b31ab05864f93.pdf",
    "parts": {
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      "footprint": "smbj140a.kicad_mod",
      "model_3d": "smbj140a-hero.glb",
      "model_3d_plain": "smbj140a-etched.glb",
      "model_3d_step": "smbj140a-etched.step",
      "model_3d_step_plain": "smbj140a.step",
      "lbr": "smbj140a.lbr"
    },
    "distributor_links": {
      "lcsc": "C50325435",
      "digikey": "478-7063-2-ND",
      "mouser": "581-SMBJ140A"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T09:21:48Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "478-7063-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "581-SMBJ140A",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "K",
        "type": "passive",
        "description": "Cathode (marked by cathode band) of the uni-directional SMBJ140A TVS; connects to the protected positive line, with VRWM 140 V and VBR 155-171 V at 1.0 mA."
      },
      {
        "number": "2",
        "name": "A",
        "type": "passive",
        "description": "Anode of the uni-directional SMBJ140A TVS; connects to ground/return, clamping at a maximum VC of 226.8 V at IPP 2.65 A."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: SMBJ140A is the uni-directional (suffix A) part, so the Uni-Directional pinout (pin 1 cathode, pin 2"
        ],
        "pages_sent": 6,
        "cost_usd": 0.065,
        "at": "2026-10-22T09:19:37"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/1e7f53c3711b1941161b31ab05864f93.pdf",
        "pages": 6,
        "sha256": "0ca2804d68ee4162",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 2,
        "described": 2,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "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": [
          5.3,
          3.55,
          2.15
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "029466277d91e9f5492556be93e46611049e07115c7913880c547afa96058ed4",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "smbj140a-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
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        "sha256": "05b49b16ded8a162d64beec3d36e754a6acd4f2f41314606fd3b8fce6f5adbbd",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "FUXINSEMI",
      "Package": "DO-214AA(SMB)",
      "Category": "Circuit Protection",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "0ca2804d68ee41624400cbcfb811a3dfc633eac1f6f184549e5c30205c3a3d10",
      "rows": [
        {
          "name": "Reverse stand-off voltage",
          "symbol": "VRWM",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 140,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Breakdown voltage",
          "symbol": "VBR",
          "kind": "electrical",
          "unit": "V",
          "min": 155,
          "typ": null,
          "max": 171,
          "conditions": "@IT = 1.0 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum clamping voltage",
          "symbol": "VC",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 226.8,
          "conditions": "@IPP",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Peak pulse current",
          "symbol": "IPP",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 2.65,
          "conditions": "10/1000 µs waveform",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum reverse leakage current",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "@VRWM",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Breakdown test current",
          "symbol": "IT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Peak power dissipation",
          "symbol": "PPPM",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 600,
          "conditions": "10/1000 µs waveform, Note 1, 2 & Fig. 1",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Steady state power dissipation",
          "symbol": "PM(AV)",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "at TL=75 °C, Note 2",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Peak forward surge current",
          "symbol": "IFSM",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "8.3ms single half sine-wave, Note 3",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Maximum instantaneous forward voltage",
          "symbol": "VF",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 3.5,
          "conditions": "at 50A, uni-directional only, VBR<200V",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature range",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Typical thermal resistance, junction to case",
          "symbol": "RθJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 30,
          "max": null,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Typical thermal resistance, junction to ambient",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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  "discovery_triggers": [
    "smbj140a"
  ],
  "discovery_pitch": "SMBJ140A (FUXINSEMI) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "path": "docs/hero.png"
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    "smbj140a-etched.glb"
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  "visibility": {
    "public": true
  }
}