CJ818B

{
  "schema_version": 1,
  "type": "component",
  "slug": "cj818b",
  "title": "CJ818B",
  "brief": "Changjing Bipolar (BJT), SOT-23-6L. 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",
    "transistors-thyristors",
    "cj818b",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "CJ818B",
    "manufacturer": "Changjing",
    "package": "SOT-23-6L",
    "pin_count": 6,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/7d9b3858b6ed1ed5eef148273dc9963e.pdf",
    "parts": {
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      "footprint": "cj818b.kicad_mod",
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      "model_3d_step_plain": "cj818b.step",
      "lbr": "cj818b.lbr"
    },
    "distributor_links": {
      "lcsc": "C47089393"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T16:09:50Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "C",
        "type": "passive",
        "description": "Collector, tied internally to pins 2, 5 and 6; Vceo -30 V, Ic -3 A continuous."
      },
      {
        "number": "2",
        "name": "C",
        "type": "passive",
        "description": "Collector, tied internally to pins 1, 5 and 6; Vceo -30 V, Ic -3 A continuous."
      },
      {
        "number": "3",
        "name": "B",
        "type": "passive",
        "description": "Base; Vebo -5 V maximum emitter-base voltage."
      },
      {
        "number": "4",
        "name": "E",
        "type": "passive",
        "description": "Emitter of the PNP transistor; Vebo -5 V."
      },
      {
        "number": "5",
        "name": "C",
        "type": "passive",
        "description": "Collector, tied internally to pins 1, 2 and 6; Vcbo -30 V."
      },
      {
        "number": "6",
        "name": "C",
        "type": "passive",
        "description": "Collector, tied internally to pins 1, 2 and 5; Vcbo -30 V."
      }
    ],
    "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: Pin assignment was read from the equivalent-circuit drawing on page 1 (C=1,2,5,6; B=3; E=4). The tex",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 5,
        "cost_usd": 0.206,
        "at": "2026-10-17T16:08:10"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/7d9b3858b6ed1ed5eef148273dc9963e.pdf",
        "pages": 5,
        "sha256": "ddb191db125b5795",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "cj818b.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "c9fe686b4d1b56927a41fa84a9bc1efb61d8a45a123a3db43bcaa05c2891d635",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cj818b-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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "7f1468df3a0331e89846cc03ff9b5c957941dd82740fb0c3054b822396bc782f",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Changjing",
      "Package": "SOT-23-6L",
      "Category": "Transistors/Thyristors",
      "Pins": "6"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "ddb191db125b579563c55d8b6535b47fdc63beb628dc7d597d104fa66e4346f0",
      "rows": [
        {
          "name": "Collector-base breakdown voltage",
          "symbol": "V(BR)CBO",
          "kind": "electrical",
          "unit": "V",
          "min": -30,
          "typ": null,
          "max": null,
          "conditions": "IC=-100μA,IE=0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter breakdown voltage",
          "symbol": "V(BR)CEO",
          "kind": "electrical",
          "unit": "V",
          "min": -30,
          "typ": null,
          "max": null,
          "conditions": "IC=-10mA,IB=0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Emitter-base breakdown voltage",
          "symbol": "V(BR)EBO",
          "kind": "electrical",
          "unit": "V",
          "min": -5,
          "typ": null,
          "max": null,
          "conditions": "IE=-100μA,IC=0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector cut-off current",
          "symbol": "ICBO",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": -0.1,
          "conditions": "VCB=-30V,IE=0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Emitter cut-off current",
          "symbol": "IEBO",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": -0.1,
          "conditions": "VEB=-5V,IC=0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "DC current gain",
          "symbol": "hFE",
          "kind": "electrical",
          "unit": "",
          "min": 100,
          "typ": null,
          "max": null,
          "conditions": "VCE=-1V, IC=-0.5A",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter saturation voltage",
          "symbol": "VCE(sat)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -0.15,
          "conditions": "IC=-0.5A,IB=-5mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter saturation voltage",
          "symbol": "VCE(sat)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -0.45,
          "conditions": "IC=-1.2A,IB=-12mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter saturation voltage",
          "symbol": "VCE(sat)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -0.8,
          "conditions": "IC=-2A,IB=-20mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Base-emitter saturation voltage",
          "symbol": "VBE(sat)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -1.1,
          "conditions": "IC=-0.5A,IB=-5mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Base-emitter saturation voltage",
          "symbol": "VBE(sat)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -1.2,
          "conditions": "IC=-2A,IB=-20mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Base-emitter on voltage",
          "symbol": "VBE(on)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -1.1,
          "conditions": "IC=-0.5A, VCE=-2V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-base voltage (maximum rating)",
          "symbol": "VCBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -30,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter voltage (maximum rating)",
          "symbol": "VCEO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -30,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Emitter-base voltage (maximum rating)",
          "symbol": "VEBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -5,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector current, continuous",
          "symbol": "IC",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": -3,
          "conditions": "Continuous",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector dissipation",
          "symbol": "PC",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 0.35,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Total dissipation",
          "symbol": "Ptot",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1.2,
          "conditions": "TC = 25℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operation junction and storage temperature range",
          "symbol": "TJ,Tstg",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to ambient",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": 357,
          "max": null,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to case",
          "symbol": "RθJC",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": 104.2,
          "max": null,
          "conditions": "Package mounted on FR4 pcb 25mm x 25mm (note 1)",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "CJ818B (Changjing) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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  "visibility": {
    "public": true
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}