BC847B

{
  "schema_version": 1,
  "type": "component",
  "slug": "bc847b",
  "title": "BC847B",
  "brief": "Guangdong Hottech Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "transistors-thyristors",
    "bc847b",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "BC847B",
    "manufacturer": "Guangdong Hottech",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905238178222080",
    "parts": {
      "symbol": "bc847b.kicad_sym",
      "footprint": "bc847b.kicad_mod",
      "model_3d": "bc847b-etched.glb",
      "model_3d_plain": "bc847b.glb",
      "model_3d_step": "bc847b-etched.step",
      "model_3d_step_plain": "bc847b.step",
      "lbr": "bc847b.lbr"
    },
    "distributor_links": {
      "lcsc": "C181140"
    },
    "pins": [
      {
        "number": "1",
        "name": "B",
        "type": "input",
        "description": "Base - NPN control terminal; DC current gain hFE 200-450 (BC847B) at VCE=5V, IC=2mA; base-emitter saturation voltage VBE(sat) max 1.1V at IC=100mA, IB=5mA."
      },
      {
        "number": "2",
        "name": "E",
        "type": "passive",
        "description": "Emitter - NPN emitter terminal; emitter-base breakdown voltage VEBO=6V; emitter cut-off current IEBO max 0.1µA at VEB=5V, IC=0."
      },
      {
        "number": "3",
        "name": "C",
        "type": "passive",
        "description": "Collector - NPN collector terminal; max collector current IC=100mA, collector-emitter breakdown voltage V(BR)CEO=45V, collector-emitter saturation voltage VCE(sat) max 0.5V at IC=100mA, IB=5mA, max power dissipation PC=200mW."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-sonnet-4-6",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-4-7",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin-number-to-function labels on the SOT-23 package drawing (page 1, top-right) are small and partia",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 4,
        "cost_usd": 0.158,
        "at": "2026-09-18T04:09:06"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905238178222080",
        "pages": 4,
        "sha256": "11fee808a1df2158",
        "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": "bc847b.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": "bc847b-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": "8bbe8796139ccabddb482939721ed4cbc91e318c80418edaef1d40a1e9a4328c",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Guangdong Hottech",
      "Package": "SOT-23",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "bc847b"
  ],
  "discovery_pitch": "BC847B (Guangdong Hottech) 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",
    "bc847b.kicad_sym",
    "bc847b.kicad_mod",
    "bc847b.glb",
    "bc847b.step",
    "bc847b.lbr",
    "docs/hero.png",
    "docs/bc847b-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T17:37:47.938Z"
}