BC857BS

{
  "schema_version": 1,
  "type": "component",
  "slug": "bc857bs",
  "title": "BC857BS",
  "brief": "FUXINSEMI Bipolar (BJT), SOT-363. 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",
    "bc857bs",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "BC857BS",
    "manufacturer": "FUXINSEMI",
    "package": "SOT-363",
    "pin_count": 6,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590908595498266624",
    "parts": {
      "symbol": "bc857bs.kicad_sym",
      "footprint": "bc857bs.kicad_mod",
      "model_3d": "bc857bs-hero.glb",
      "model_3d_plain": "bc857bs.glb",
      "model_3d_step": "bc857bs-etched.step",
      "model_3d_step_plain": "bc857bs.step",
      "lbr": "bc857bs.lbr"
    },
    "distributor_links": {
      "lcsc": "C5380688",
      "digikey": "6557-BC857BSTR-ND"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T03:50:30Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "6557-BC857BSTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "E1",
        "type": "passive",
        "description": "Emitter of transistor 1 (PNP); emitter-base voltage limit -5 V, continuous collector current -0.2 A per the maximum ratings."
      },
      {
        "number": "2",
        "name": "B1",
        "type": "passive",
        "description": "Base of transistor 1 (PNP); VCE(sat) max -0.3 V at IC=-10 mA, IB=-0.5 mA."
      },
      {
        "number": "3",
        "name": "C2",
        "type": "passive",
        "description": "Collector of transistor 2 (PNP); collector-emitter voltage limit -45 V and collector-base voltage limit -50 V."
      },
      {
        "number": "4",
        "name": "E2",
        "type": "passive",
        "description": "Emitter of transistor 2 (PNP); emitter-base voltage limit -5 V."
      },
      {
        "number": "5",
        "name": "B2",
        "type": "passive",
        "description": "Base of transistor 2 (PNP); hFE 250-475 for the BC857BS rank at VCE=-5 V, IC=-2 mA."
      },
      {
        "number": "6",
        "name": "C1",
        "type": "passive",
        "description": "Collector of transistor 1 (PNP); collector-emitter voltage limit -45 V and collector-base voltage limit -50 V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet page 1 pin diagram shows only pin numbers 1-6 beside two PNP transistor symbols and gi; The part is a passive-type transistor with no supply pins, so I used the passive class for all pins.",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 3,
        "cost_usd": 0.2263,
        "at": "2026-10-09T03:49:14"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590908595498266624",
        "pages": 3,
        "sha256": "7a58bf4848642643",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "bc857bs.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.1,
          2,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "045cc95e18ee7a13d1623c3ce6604fc833049bdb4f952f68c26e3c5767d122e4",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bc857bs-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.1,
          2,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "a6290221b5a816d4801120ef3f98f177e749c366eedb8c6a00faf1b24b1a80ae",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "FUXINSEMI",
      "Package": "SOT-363",
      "Category": "Transistors/Thyristors",
      "Pins": "6"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "bc857bs"
  ],
  "discovery_pitch": "BC857BS (FUXINSEMI) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bc857bs.kicad_sym",
    "bc857bs.kicad_mod",
    "bc857bs.glb",
    "bc857bs.step",
    "bc857bs.lbr",
    "docs/hero.png",
    "docs/bc857bs-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bc857bs-hero.glb",
    "bc857bs-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}