BC548

{
  "slug": "bc548",
  "version": "0.1.0",
  "type": "component",
  "description": "Changjiang Electronics Tech (CJ) Bipolar Transistors - BJT, TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "transistors",
    "bc548",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bc548.kicad_sym",
    "bc548.kicad_mod",
    "bc548.glb",
    "bc548.step",
    "bc548.lbr",
    "docs/hero.png",
    "docs/bc548-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bc548-hero.glb",
    "bc548-hero.overlay.json",
    "bc548-etched.glb"
  ],
  "component": {
    "mpn": "BC548",
    "manufacturer": "Changjiang Electronics Tech (CJ)",
    "package": "TO-92",
    "pin_count": 3,
    "category": "Transistors",
    "subcategory": "Bipolar Transistors - BJT",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/faaa751c764544419d76cb9c9d725e01.pdf",
    "parts": {
      "symbol": "bc548.kicad_sym",
      "footprint": "bc548.kicad_mod",
      "model_3d": "bc548-hero.glb",
      "model_3d_plain": "bc548-etched.glb",
      "model_3d_step": "bc548-etched.step",
      "model_3d_step_plain": "bc548.step",
      "lbr": "bc548.lbr"
    },
    "distributor_links": {
      "lcsc": "C36611",
      "mouser": "512-BC548"
    },
    "distributor_check": {
      "checked_at": "2026-11-05T01:21:06Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": "512-BC548",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COLLECTOR",
        "type": "passive",
        "description": "Collector of the NPN transistor; for BC548 the datasheet gives VCBO 30 V, VCEO 30 V, and continuous collector current IC 0.1 A, with collector power dissipation PC 625 mW."
      },
      {
        "number": "2",
        "name": "BASE",
        "type": "input",
        "description": "Base of the NPN transistor; the datasheet lists the BC548 emitter-base voltage VEBO as 5 V and gives VBE(sat) 1.1 V at IC=100 mA, IB=5 mA."
      },
      {
        "number": "3",
        "name": "EMITTER",
        "type": "passive",
        "description": "Emitter of the NPN transistor; the datasheet lists the BC548 emitter-base voltage VEBO as 5 V (the emitter-base breakdown voltage V(BR)EBO minimum is 5 V at IE=10 μA)."
      }
    ],
    "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 covers the BC546/BC547/BC548 family in one document; the pin descriptions use the BC54; The datasheet gives only the pin order as text (1. COLLECTOR, 2. BASE, 3. EMITTER) with no dimension"
        ],
        "pages_sent": 2,
        "cost_usd": 0.0119,
        "at": "2026-11-05T01:20:59"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/faaa751c764544419d76cb9c9d725e01.pdf",
        "pages": 2,
        "sha256": "068ebd7ca4658019",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "bc548.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          4.83,
          3.745,
          9.8
        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
        "sha256": "f0b61c32ecbf0067157adc5a3d4966ceadf5d6dafe93c51af35f76c41c71a54a",
        "checked": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bc548-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
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        "sha256": "48b6589a1a76d1c12f445f5c1abf38d1445faa93717b4aa8c214ea5369d828a4",
        "checked": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}