main
Ray Set visibility: public 87a55c8 17d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "bc337-25",
  "title": "BC337-25",
  "brief": "Changjing Bipolar (BJT), TO-92. 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",
    "bc337-25",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "BC337-25",
    "manufacturer": "Changjing",
    "package": "TO-92",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588900129877741568",
    "parts": {
      "symbol": "bc337-25.kicad_sym",
      "footprint": "bc337-25.kicad_mod",
      "model_3d": "bc337-25-hero.glb",
      "model_3d_plain": "bc337-25-etched.glb",
      "model_3d_step": "bc337-25-etched.step",
      "model_3d_step_plain": "bc337-25.step",
      "lbr": "bc337-25.lbr"
    },
    "distributor_links": {
      "lcsc": "C14579",
      "digikey": "4878-BC337-25CT-ND",
      "mouser": "637-BC337-25"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T07:14:49Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "4878-BC337-25CT-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "637-BC337-25",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COLLECTOR",
        "type": "passive",
        "description": "Collector terminal of the NPN transistor; the datasheet rates collector-emitter voltage VCEO at 45 V (BC337) and continuous collector current IC at 800 mA."
      },
      {
        "number": "2",
        "name": "BASE",
        "type": "passive",
        "description": "Base terminal of the NPN transistor; the datasheet specifies VBE(sat) of 1.2 V at IC=500 mA, IB=50 mA."
      },
      {
        "number": "3",
        "name": "EMITTER",
        "type": "passive",
        "description": "Emitter terminal of the NPN transistor; the datasheet specifies emitter-base voltage VEBO of 5 V."
      }
    ],
    "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 gives only one TO-92 pinout (1 COLLECTOR, 2 BASE, 3 EMITTER) and does not specify the ; Pin types are KiCad BJT-style 'passive' assignments chosen by the extractor; the datasheet does not ; The hFE table in the datasheet text is garbled, so the BC337-25 DC current gain range was not extrac"
        ],
        "pages_sent": 2,
        "cost_usd": 0.0063,
        "at": "2026-10-18T07:13:14"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588900129877741568",
        "pages": 2,
        "sha256": "d08d24484cb68faf",
        "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": "bc337-25.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          4.83,
          3.745,
          9.8
        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
        "sha256": "f0b61c32ecbf0067157adc5a3d4966ceadf5d6dafe93c51af35f76c41c71a54a",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bc337-25-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          4.83,
          3.745,
          9.8
        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
        "sha256": "86d665c640bbd60e5eff94d7c71c742d78ddf7a521467880defcaaa13be2453e",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Changjing",
      "Package": "TO-92",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "d08d24484cb68fafcf009435d5ef1b6c3e49b31280d8cf31e3966934c5ad49c4",
      "rows": [
        {
          "name": "DC current gain hFE(1), BC337-25 group",
          "symbol": "hFE(1)",
          "kind": "electrical",
          "unit": "",
          "min": 160,
          "typ": null,
          "max": 400,
          "conditions": "VCE=1V, IC= 100mA",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector-base breakdown voltage (BC337)",
          "symbol": "VCBO",
          "kind": "electrical",
          "unit": "V",
          "min": 50,
          "typ": null,
          "max": null,
          "conditions": "IC= 100uA, IE=0",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter breakdown voltage (BC337)",
          "symbol": "VCEO",
          "kind": "electrical",
          "unit": "V",
          "min": 45,
          "typ": null,
          "max": null,
          "conditions": "IC= 10mA, IB=0",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Emitter-base breakdown voltage",
          "symbol": "VEBO",
          "kind": "electrical",
          "unit": "V",
          "min": 5,
          "typ": null,
          "max": null,
          "conditions": "IE= 10uA, IC=0",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector cut-off current (BC337)",
          "symbol": "ICBO",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "VCB= 45V, IE=0",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector cut-off current (BC337)",
          "symbol": "ICEO",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 0.2,
          "conditions": "VCE= 40V, IB=0",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Emitter cut-off current",
          "symbol": "IEBO",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "VEB= 4 V, IC=0",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "DC current gain hFE(2)",
          "symbol": "hFE(2)",
          "kind": "electrical",
          "unit": "",
          "min": null,
          "typ": 60,
          "max": null,
          "conditions": "VCE=1V, IC= 300mA",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter saturation voltage",
          "symbol": "VCE(sat)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.7,
          "max": null,
          "conditions": "IC=500mA, IB= 50mA",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Base-emitter saturation voltage",
          "symbol": "VBE(sat)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.2,
          "max": null,
          "conditions": "IC= 500mA, IB=50mA",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Base-emitter voltage",
          "symbol": "VBE",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.2,
          "max": null,
          "conditions": "VCE=1V, IC= 300mA",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Transition frequency",
          "symbol": "fT",
          "kind": "electrical",
          "unit": "MHz",
          "min": null,
          "typ": 210,
          "max": null,
          "conditions": "VCE= 5V, IC= 10mA, f = 100MHz",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector output capacitance",
          "symbol": "Cob",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 15,
          "max": null,
          "conditions": "VCB=10V, IE=0, f=1MHz",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector-base voltage (absolute maximum, BC337)",
          "symbol": "VCBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "Ta=25℃ (maximum ratings header)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter voltage (absolute maximum, BC337)",
          "symbol": "VCEO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 45,
          "conditions": "Ta=25℃ (maximum ratings header)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Emitter-base voltage (absolute maximum)",
          "symbol": "VEBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "Ta=25℃ (maximum ratings header)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector current, continuous (absolute maximum)",
          "symbol": "IC",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 800,
          "conditions": "Continuous, Ta=25℃ (maximum ratings header)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Total device dissipation (absolute maximum)",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 625,
          "conditions": "Ta=25℃ (maximum ratings header)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature (absolute maximum)",
          "symbol": "Tj",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "bc337-25"
  ],
  "discovery_pitch": "BC337-25 (Changjing) 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",
    "bc337-25.kicad_sym",
    "bc337-25.kicad_mod",
    "bc337-25.glb",
    "bc337-25.step",
    "bc337-25.lbr",
    "docs/hero.png",
    "docs/bc337-25-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bc337-25-hero.glb",
    "bc337-25-hero.overlay.json",
    "bc337-25-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}