BDX53B

{
  "slug": "bdx53b",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics Bipolar Transistors - BJT, TO-220. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "triode-mos tube-transistor",
    "bdx53b",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bdx53b.kicad_sym",
    "bdx53b.kicad_mod",
    "bdx53b.glb",
    "bdx53b.step",
    "bdx53b.lbr",
    "docs/hero.png",
    "docs/bdx53b-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bdx53b-hero.glb",
    "bdx53b-hero.overlay.json",
    "bdx53b-etched.glb"
  ],
  "component": {
    "mpn": "BDX53B",
    "manufacturer": "STMicroelectronics",
    "package": "TO-220",
    "pin_count": 3,
    "category": "Triode/MOS Tube/Transistor",
    "subcategory": "Bipolar Transistors - BJT",
    "datasheet": "https://www.st.com/resource/en/datasheet/bdx53b.pdf",
    "parts": {
      "symbol": "bdx53b.kicad_sym",
      "footprint": "bdx53b.kicad_mod",
      "model_3d": "bdx53b-hero.glb",
      "model_3d_plain": "bdx53b-etched.glb",
      "model_3d_step": "bdx53b-etched.step",
      "model_3d_step_plain": "bdx53b.step",
      "lbr": "bdx53b.lbr"
    },
    "distributor_links": {
      "lcsc": "C5199061",
      "digikey": "497-7182-5-ND",
      "mouser": "511-BDX53B"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T03:39:14Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-7182-5-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "511-BDX53B",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "B",
        "type": "input",
        "description": "Base of the NPN Darlington (BDX53B); emitter-base voltage limited to 5 V (VEBO) and base current to 0.2 mA per Table 2."
      },
      {
        "number": "2",
        "name": "C",
        "type": "passive",
        "description": "Collector (also connected to the mounting tab); VCBO and VCEO are 80 V for BDX53B, with collector current up to 8 A continuous and 12 A peak."
      },
      {
        "number": "3",
        "name": "E",
        "type": "passive",
        "description": "Emitter of the Darlington, with an integrated antiparallel collector-emitter diode (VF up to 2.5 V at IF = 3 A)."
      }
    ],
    "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: Datasheet table 2 lists base current as '0.2 mA', which is probably a typo for 0.2 A. Pin 2 tab conn",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 7,
        "cost_usd": 0.1878,
        "at": "2026-10-23T03:39:00"
      },
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/bdx53b.pdf",
        "pages": 7,
        "sha256": "3b8956304ef88eac",
        "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"
    },
    "models_3d": [
      {
        "file": "bdx53b.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          10.25,
          4.455,
          28.525
        ],
        "zmin_mm": -9.75,
        "centre_offset_mm": 0.932,
        "footprint_binding": "identity",
        "sha256": "7cb065d935df5771f0ba6e48ddd180863a121af76483dad7f18e667a7b68204a",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bdx53b-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          10.25,
          4.455,
          28.525
        ],
        "zmin_mm": -9.75,
        "centre_offset_mm": 0.932,
        "footprint_binding": "identity",
        "sha256": "e2306a63760d35fcb9090e1cce38328f9a45426d5ac0297fb6372369fe408cc6",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}