CJ818B

{
  "slug": "cj818b",
  "version": "0.1.0",
  "type": "component",
  "description": "Changjing Bipolar (BJT), SOT-23-6L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "transistors-thyristors",
    "cj818b",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cj818b.kicad_sym",
    "cj818b.kicad_mod",
    "cj818b.glb",
    "cj818b.step",
    "cj818b.lbr",
    "docs/hero.png",
    "docs/cj818b-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cj818b-hero.glb",
    "cj818b-hero.overlay.json",
    "cj818b-etched.glb"
  ],
  "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": {
      "symbol": "cj818b.kicad_sym",
      "footprint": "cj818b.kicad_mod",
      "model_3d": "cj818b-hero.glb",
      "model_3d_plain": "cj818b-etched.glb",
      "model_3d_step": "cj818b-etched.step",
      "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": 0.0,
        "centre_offset_mm": 0.0,
        "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": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "7f1468df3a0331e89846cc03ff9b5c957941dd82740fb0c3054b822396bc782f",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}