BUL49D

{
  "slug": "bul49d",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics Bipolar (BJT), TO-220. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "transistors-thyristors",
    "bul49d",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bul49d.kicad_sym",
    "bul49d.kicad_mod",
    "bul49d.glb",
    "bul49d.step",
    "bul49d.lbr",
    "docs/hero.png",
    "docs/bul49d-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "component": {
    "mpn": "BUL49D",
    "manufacturer": "STMicroelectronics",
    "package": "TO-220",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://www.st.com/resource/en/datasheet/bul49d.pdf",
    "parts": {
      "symbol": "bul49d.kicad_sym",
      "footprint": "bul49d.kicad_mod",
      "model_3d": "bul49d-etched.glb",
      "model_3d_plain": "bul49d.glb",
      "model_3d_step": "bul49d-etched.step",
      "model_3d_step_plain": "bul49d.step",
      "lbr": "bul49d.lbr"
    },
    "distributor_links": {
      "lcsc": "C3200841"
    },
    "pins": [
      {
        "number": "1",
        "name": "B",
        "type": "input",
        "description": "Base terminal of the NPN power transistor; base current IB is rated up to 2 A continuous and 4 A peak (tP < 5 ms)."
      },
      {
        "number": "2",
        "name": "C",
        "type": "passive",
        "description": "Collector terminal of the NPN power transistor; collector-emitter voltage VCES (VBE=0) is rated up to 850 V and collector current IC up to 5 A (10 A peak, tP < 5 ms)."
      },
      {
        "number": "3",
        "name": "E",
        "type": "passive",
        "description": "Emitter terminal of the NPN power transistor, internally connected to an integral flyback (freewheeling) diode; emitter-base breakdown voltage V(BR)EBO is 10 to 18 V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-sonnet-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-4-8",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 15,
        "cost_usd": 0.248,
        "at": "2026-09-24T08:30:12"
      },
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/bul49d.pdf",
        "pages": 15,
        "sha256": "415eee02a8ac53f9",
        "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": "bul49d.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": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bul49d-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": "9cb5e5bc1b66a4c871f3d8f0c24f930980d5c6a45fd11b78996c0635a8c5ebfa",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}