BDX34C

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  "schema_version": 1,
  "type": "component",
  "slug": "bdx34c",
  "title": "BDX34C",
  "brief": "STMicroelectronics Darlington Transistors, TO-220. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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  "component": {
    "mpn": "BDX34C",
    "manufacturer": "STMicroelectronics",
    "package": "TO-220",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Darlington Transistors",
    "datasheet": "https://www.st.com/resource/en/datasheet/bdx34c.pdf",
    "parts": {
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      "footprint": "bdx34c.kicad_mod",
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      "lbr": "bdx34c.lbr"
    },
    "distributor_links": {
      "lcsc": "C495218",
      "digikey": "497-12143-ND",
      "mouser": "511-BDX34C"
    },
    "distributor_check": {
      "checked_at": "2026-09-26T19:37:32Z",
      "source": "Component Ocean /api/assign-pns",
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        "status": "found",
        "lifecycle": "Active"
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    },
    "pins": [
      {
        "number": "1",
        "name": "Base",
        "type": "input",
        "description": "Base input terminal; maximum input current 0.25 A for control of the PNP Darlington transistor."
      },
      {
        "number": "2",
        "name": "Collector",
        "type": "passive",
        "description": "Collector terminal; maximum continuous collector current 10 A (15 A peak) at maximum collector-emitter voltage of 100 V."
      },
      {
        "number": "3",
        "name": "Emitter",
        "type": "passive",
        "description": "Emitter terminal; main current return path of the PNP Darlington transistor."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 4,
        "cost_usd": 0.0976,
        "at": "2026-09-26T19:37:18"
      },
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/bdx34c.pdf",
        "pages": 4,
        "sha256": "3702a741925a6273",
        "source_tier": "mfr"
      },
      "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"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "TO-220",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    }
  },
  "variants": [],
  "sections": [
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  "discovery_triggers": [
    "bdx34c"
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  "discovery_pitch": "BDX34C (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
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    "bdx34c.lbr",
    "docs/hero.png",
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  "visibility": {
    "public": true
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}