BD138

{
  "slug": "bd138",
  "version": "0.1.0",
  "type": "component",
  "description": "Changjing Bipolar Transistors - BJT, TO-126. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
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    "triode-mos tube-transistor",
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  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
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    "bd138.lbr",
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    "docs/bd138-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
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    "bd138-hero.overlay.json",
    "bd138-etched.glb"
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  "component": {
    "mpn": "BD138",
    "manufacturer": "Changjing",
    "package": "TO-126",
    "pin_count": 3,
    "category": "Triode/MOS Tube/Transistor",
    "subcategory": "Bipolar Transistors - BJT",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a5b729b98741ffba804cd1572e53212c.pdf",
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      "footprint": "bd138.kicad_mod",
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      "model_3d_plain": "bd138-etched.glb",
      "model_3d_step": "bd138-etched.step",
      "model_3d_step_plain": "bd138.step",
      "lbr": "bd138.lbr"
    },
    "distributor_links": {
      "lcsc": "C2992045",
      "digikey": "497-19583-ND",
      "mouser": "511-BD138"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T00:07:53Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-19583-ND",
        "status": "found"
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      "mouser": {
        "pn": "511-BD138",
        "status": "found"
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    },
    "pins": [
      {
        "number": "1",
        "name": "EMITTER",
        "type": "passive",
        "description": "Emitter terminal of the PNP transistor; the emitter-base breakdown voltage V(BR)EBO is -5 V at IE=-0.1mA."
      },
      {
        "number": "2",
        "name": "COLLECTOR",
        "type": "passive",
        "description": "Collector terminal of the PNP transistor; the maximum collector current IC is -1.5 A with a collector power dissipation PC of 1.25 W."
      },
      {
        "number": "3",
        "name": "BASE",
        "type": "input",
        "description": "Base terminal of the PNP transistor; the base-emitter voltage VBE is -1 V maximum at VCE=-2V, IC=-500mA."
      }
    ],
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        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": null,
        "consensus": "skipped (clean text read)",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 4,
        "cost_usd": 0.0004,
        "at": "2026-10-27T00:07:01"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/a5b729b98741ffba804cd1572e53212c.pdf",
        "pages": 4,
        "sha256": "48b0338ef78cd5fc",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
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        "extents_mm": [
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        "zmin_mm": -9.75,
        "centre_offset_mm": 0.375,
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        "checked": "2026-10-27",
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      },
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}