BCX51

{
  "slug": "bcx51",
  "version": "0.1.0",
  "type": "component",
  "description": "Nexperia Bipolar (BJT), SOT-89. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "transistors-thyristors",
    "bcx51",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bcx51.kicad_sym",
    "bcx51.kicad_mod",
    "bcx51.glb",
    "bcx51.step",
    "bcx51.lbr",
    "docs/hero.png",
    "docs/bcx51-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bcx51-hero.glb",
    "bcx51-hero.overlay.json",
    "bcx51-etched.glb"
  ],
  "component": {
    "mpn": "BCX51",
    "manufacturer": "Nexperia",
    "package": "SOT-89",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586183958710636544",
    "parts": {
      "symbol": "bcx51.kicad_sym",
      "footprint": "bcx51.kicad_mod",
      "model_3d": "bcx51-hero.glb",
      "model_3d_plain": "bcx51-etched.glb",
      "model_3d_step": "bcx51-etched.step",
      "model_3d_step_plain": "bcx51.step",
      "lbr": "bcx51.lbr"
    },
    "distributor_links": {
      "lcsc": "C130421"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T00:13:02Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "error",
        "error": "The read operation timed out"
      },
      "mouser": {
        "pn": null,
        "status": "error",
        "error": "The read operation timed out"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "emitter",
        "type": "passive",
        "description": "Emitter of the PNP transistor, the pin that the base-emitter voltage and emitter current are referenced to (VEBO maximum 5 V)."
      },
      {
        "number": "2",
        "name": "collector",
        "type": "passive",
        "description": "Collector of the PNP transistor, which is also the exposed collector pad that provides good heat transfer; collector current is limited to 1 A (IC) and collector-emitter voltage to 45 V (VCEO)."
      },
      {
        "number": "3",
        "name": "base",
        "type": "passive",
        "description": "Base of the PNP transistor; base current is limited to 0.3 A (IB)."
      }
    ],
    "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 pinning table gives only the pin names (emitter, collector, base) for SOT89; the datasheet does ; Table 4 states the SOT89 collector pad is for heat transfer, and the pinout ties the collector to pi; The pinout applies to the BCX51 (SOT89) variant only. BCP51 uses SOT223 and BC51PA uses SOT1061, whi"
        ],
        "pages_sent": 22,
        "cost_usd": 0.0656,
        "at": "2026-10-18T00:11:45"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586183958710636544",
        "pages": 22,
        "sha256": "0e4647b987f3b8fb",
        "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": [
      {
        "file": "bcx51.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.5,
          1.52
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "844c0bb504d0c383535d9845c6376fe7a4053241a2ede8d8ef694df3fcfc37c8",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bcx51-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.5,
          1.52
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "675ed645cd3de09bfb10d81143f305ccb2ad0ddc65a095b67ba250d0f5f72a30",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}