BC857B_R1_00001

{
  "slug": "bc857b-r1-00001",
  "version": "0.1.0",
  "type": "component",
  "description": "PANJIT International Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "transistors-thyristors",
    "bc857b_r1_00001",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bc857b-r1-00001.kicad_sym",
    "bc857b-r1-00001.kicad_mod",
    "bc857b-r1-00001.glb",
    "bc857b-r1-00001.step",
    "bc857b-r1-00001.lbr",
    "docs/hero.png",
    "docs/bc857b-r1-00001-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bc857b-r1-00001-hero.glb",
    "bc857b-r1-00001-hero.overlay.json",
    "bc857b-r1-00001-etched.glb"
  ],
  "component": {
    "mpn": "BC857B_R1_00001",
    "manufacturer": "PANJIT International",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602837811087089664",
    "parts": {
      "symbol": "bc857b-r1-00001.kicad_sym",
      "footprint": "bc857b-r1-00001.kicad_mod",
      "model_3d": "bc857b-r1-00001-hero.glb",
      "model_3d_plain": "bc857b-r1-00001-etched.glb",
      "model_3d_step": "bc857b-r1-00001-etched.step",
      "model_3d_step_plain": "bc857b-r1-00001.step",
      "lbr": "bc857b-r1-00001.lbr"
    },
    "distributor_links": {
      "lcsc": "C6751499"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T19:04:17Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Base",
        "type": "input",
        "description": "Base terminal of the PNP transistor, with the emitter-base voltage limited to -5 V (VEBO) per the absolute ratings."
      },
      {
        "number": "2",
        "name": "Emitter",
        "type": "passive",
        "description": "Emitter terminal of the PNP transistor, the reference for the base-emitter voltage and the -5 V VEBO rating."
      },
      {
        "number": "3",
        "name": "Collector",
        "type": "passive",
        "description": "Collector terminal of the PNP transistor; for the BC857 device the collector-emitter voltage is -45 V and the continuous collector current is -100 mA (peak -200 mA)."
      }
    ],
    "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 datasheet is the BC856 series (PNP, SOT-23). The MPN BC857B_R1_00001 is covered by the device ma; Pin assignments were taken from the text-extracted 'Top View' diagram (3 Collector, 1 Base, 2 Emitte; The datasheet gives no dedicated spec field requested by the schema; the collector and emitter descr"
        ],
        "pages_sent": 5,
        "cost_usd": 0.0278,
        "at": "2026-10-17T19:02:05"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602837811087089664",
        "pages": 5,
        "sha256": "b768e2b14ba986ca",
        "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"
    },
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        "file": "bc857b-r1-00001.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": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bc857b-r1-00001-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "ab9b2960fc365b42f6c5bc97d6f917f98fbd711e37368261cdf46ea6b57b82c5",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}