BF550

{
  "schema_version": 1,
  "type": "component",
  "slug": "bf550",
  "title": "BF550",
  "brief": "Nexperia Bipolar (BJT), SOT-23. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "transistors-thyristors",
    "bf550"
  ],
  "component": {
    "mpn": "BF550",
    "manufacturer": "Nexperia",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588913513767047168",
    "parts": {
      "symbol": "bf550.kicad_sym",
      "footprint": "bf550.kicad_mod",
      "model_3d": "bf550-etched.glb",
      "model_3d_plain": "bf550.glb",
      "model_3d_step": "bf550-etched.step",
      "model_3d_step_plain": "bf550.step",
      "lbr": "bf550.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "B",
        "type": "input",
        "description": "Base terminal of the PNP BJT. Controls collector current via VBE (typ. -750 mV at IC = -1 mA, VCE = -10 V). Emitter-base breakdown VEBO = -4 V (open collector)."
      },
      {
        "number": "2",
        "name": "E",
        "type": "passive",
        "description": "Emitter terminal of the PNP BJT. Common reference for VBE and VCE. Emitter cut-off current IEBO max -100 nA at VEB = -3 V."
      },
      {
        "number": "3",
        "name": "C",
        "type": "passive",
        "description": "Collector terminal of the PNP BJT. VCBO = -40 V (open emitter), VCEO = -40 V (open base), IC (DC) max -25 mA, total power dissipation 250 mW at Tamb <= 25 C."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588913513767047168",
        "pages": 7,
        "sha256": "17214ceb4de5cd8d",
        "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": "bf550.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3.0,
          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bf550-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3.0,
          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4c978e7dd8f4224c4ad4226a145154ad1ae58668ceec599de77098440031c7b9",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Nexperia",
      "Package": "SOT-23",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "bf550"
  ],
  "discovery_pitch": "BF550 (Nexperia) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bf550.kicad_sym",
    "bf550.kicad_mod",
    "bf550.glb",
    "bf550.step",
    "bf550.lbr",
    "docs/hero.png",
    "docs/bf550-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T17:44:25.631Z"
}