BC857CQ-7-F

{
  "slug": "bc857cq-7-f",
  "version": "0.1.0",
  "type": "component",
  "description": "Diodes Incorporated Bipolar (BJT), SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "transistors-thyristors",
    "bc857cq-7-f",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bc857cq-7-f.kicad_sym",
    "bc857cq-7-f.kicad_mod",
    "bc857cq-7-f.glb",
    "bc857cq-7-f.step",
    "bc857cq-7-f.lbr",
    "docs/hero.png",
    "docs/bc857cq-7-f-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bc857cq-7-f-hero.glb",
    "bc857cq-7-f-hero.overlay.json"
  ],
  "component": {
    "mpn": "BC857CQ-7-F",
    "manufacturer": "Diodes Incorporated",
    "package": "SOT-23-3",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://www.diodes.com/assets/Datasheets/BC857CQ-7-F.pdf",
    "parts": {
      "symbol": "bc857cq-7-f.kicad_sym",
      "footprint": "bc857cq-7-f.kicad_mod",
      "model_3d": "bc857cq-7-f-hero.glb",
      "model_3d_plain": "bc857cq-7-f.glb",
      "model_3d_step": "bc857cq-7-f-etched.step",
      "model_3d_step_plain": "bc857cq-7-f.step",
      "lbr": "bc857cq-7-f.lbr"
    },
    "distributor_links": {
      "lcsc": "C6751505",
      "digikey": "31-BC857CQ-7-FTR-ND",
      "mouser": "621-BC857CQ-7-F"
    },
    "distributor_check": {
      "checked_at": "2026-11-12T21:05:11Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "31-BC857CQ-7-FTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "621-BC857CQ-7-F",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "B",
        "type": "passive",
        "description": "Base terminal; the peak base current IBM is limited to -200 mA."
      },
      {
        "number": "2",
        "name": "E",
        "type": "passive",
        "description": "Emitter terminal; the emitter-base voltage VEBO is -5.0 V and the peak emitter current IEM is -200 mA."
      },
      {
        "number": "3",
        "name": "C",
        "type": "passive",
        "description": "Collector terminal; the collector-emitter voltage VCEO is -45 V and the continuous collector current IC is -100 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's SOT23 pinout drawing labels the terminals C, B and E but does not print pin numbers.; Pin descriptions are based on the absolute maximum ratings (page 2) and are not datasheet statements"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0022,
        "at": "2026-11-12T21:04:59"
      },
      "datasheet": {
        "url": "https://www.diodes.com/assets/Datasheets/BC857CQ-7-F.pdf",
        "pages": 7,
        "sha256": "ce26d6bf1b6f9359",
        "source_tier": "mfr"
      },
      "cad": "land: KiCad official (CC-BY-SA 4.0); 3D: generated from the datasheet",
      "model_3d_generated": {
        "generator": "factory/gen_pkg3d.py",
        "family": "SOT",
        "height_mm": 1.025,
        "height_basis": "datasheet A, nominal",
        "standoff_mm": 0.05,
        "standoff_basis": "family nominal (no datasheet A1 read)",
        "lead_width_mm": 0.36,
        "lead_width_basis": "default: 0.6 x pad width across the lead, at most 0.45 x pitch 1.90 mm; a tab 0.9 x its width (no datasheet b read)",
        "lead_thickness_mm": 0.2,
        "lead_thickness_basis": "default for pitch 1.90 mm, height 1.025 mm (no datasheet c read)"
      },
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "bc857cq-7-f.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.4,
          2.9,
          1.025
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "abeaaa169e6628b36ac5e235e60fec918a602c80e3cdaa3e2555d582e00ce52c",
        "checked": "2026-11-12",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bc857cq-7-f-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.4,
          2.9,
          1.025
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b0f6ce81622018432ae452137ac554d34122d431e680d545a174ede2b4b6ee43",
        "checked": "2026-11-12",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "SOT23",
      "source_page": 6,
      "D": {
        "nom_mm": 2.9,
        "range_mm": [
          2.8,
          3.0
        ]
      },
      "E1": {
        "nom_mm": 1.3,
        "range_mm": [
          1.2,
          1.4
        ]
      },
      "E": {
        "nom_mm": 2.4,
        "range_mm": [
          2.3,
          2.5
        ]
      },
      "A": {
        "nom_mm": 1.025,
        "range_mm": [
          0.903,
          1.1
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "bc857cq-7-f.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}