main
Ray Set visibility: public f82f024 3d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "2sb776",
  "title": "2SB776",
  "brief": "Changjing Bipolar Transistors - BJT, TO-126. 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",
    "triode-mos tube-transistor",
    "2sb776",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "2SB776",
    "manufacturer": "Changjing",
    "package": "TO-126",
    "pin_count": 3,
    "category": "Triode/MOS Tube/Transistor",
    "subcategory": "Bipolar Transistors - BJT",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/66d76244fb0342f82e055b710f9ad3ca.pdf",
    "parts": {
      "symbol": "2sb776.kicad_sym",
      "footprint": "2sb776.kicad_mod",
      "model_3d": "2sb776-hero.glb",
      "model_3d_plain": "2sb776-etched.glb",
      "model_3d_step": "2sb776-etched.step",
      "model_3d_step_plain": "2sb776.step",
      "lbr": "2sb776.lbr"
    },
    "distributor_links": {
      "lcsc": "C2910297"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T01:48:11Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "EMITTER",
        "type": "passive",
        "description": "Emitter of the PNP transistor; the datasheet gives no emitter-specific limit, and the emitter-base voltage VEBO is -5 V with collector current IC -3 A continuous."
      },
      {
        "number": "2",
        "name": "COLLECTOR",
        "type": "passive",
        "description": "Collector of the PNP transistor; the maximum ratings give VCBO -50 V, VCEO -50 V and collector current IC -3 A continuous."
      },
      {
        "number": "3",
        "name": "BASE",
        "type": "passive",
        "description": "Base of the PNP transistor; the datasheet gives no base-specific limit, and saturation is tested at IC -2 A with IB -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 gives the TO-126 pin names (1 EMITTER, 2 COLLECTOR, 3 BASE) but no pin-specific limits"
        ],
        "pages_sent": 3,
        "cost_usd": 0.0029,
        "at": "2026-10-27T01:48:00"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/66d76244fb0342f82e055b710f9ad3ca.pdf",
        "pages": 3,
        "sha256": "87c01f0d45602954",
        "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": "2sb776.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          8,
          3.25,
          23.75
        ],
        "zmin_mm": -9.75,
        "centre_offset_mm": 0.375,
        "footprint_binding": "identity",
        "sha256": "6cb4ab2049af821a4bd7162ee7b11b91bdea76f43915d9c1fbb0cb1cdeeaa9c6",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "2sb776-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": [
          8,
          3.25,
          23.75
        ],
        "zmin_mm": -9.75,
        "centre_offset_mm": 0.375,
        "footprint_binding": "identity",
        "sha256": "66a1b842c32feb4fc4b407b52c089313fc417a8ef01e710e410366a7a46c9ee3",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Changjing",
      "Package": "TO-126",
      "Category": "Triode/MOS Tube/Transistor",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "87c01f0d4560295434bdd208a6da9d6ba7ae5d280b3eee2fe8ad383cf4c8aa20",
      "rows": [
        {
          "name": "Collector-Base Voltage",
          "symbol": "VCBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -50,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector-Emitter Voltage",
          "symbol": "VCEO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -50,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Emitter-Base Voltage",
          "symbol": "VEBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -5,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector Current Continuous",
          "symbol": "IC",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": -3,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector Power Dissipation",
          "symbol": "PC",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operation Junction and Storage Temperature Range",
          "symbol": "TJ,Tstg",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector-base breakdown voltage",
          "symbol": "V(BR)CBO",
          "kind": "electrical",
          "unit": "V",
          "min": -50,
          "typ": null,
          "max": null,
          "conditions": "IC=-100µA,IE=0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter breakdown voltage",
          "symbol": "V(BR)CEO",
          "kind": "electrical",
          "unit": "V",
          "min": -50,
          "typ": null,
          "max": null,
          "conditions": "IC=-5mA,IB=0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Emitter-base breakdown voltage",
          "symbol": "V(BR)EBO",
          "kind": "electrical",
          "unit": "V",
          "min": -5,
          "typ": null,
          "max": null,
          "conditions": "IE=-100µA,IC=0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector cut-off current",
          "symbol": "ICBO",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": -1,
          "conditions": "VCB=-50V,IE=0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Emitter cut-off current",
          "symbol": "IEBO",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": -1,
          "conditions": "VEB=-3V,IC=0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "DC current gain hFE(1)",
          "symbol": "hFE(1)",
          "kind": "electrical",
          "unit": "",
          "min": 100,
          "typ": null,
          "max": null,
          "conditions": "VCE=-2V,IC=-20mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "DC current gain hFE(2)",
          "symbol": "hFE(2)",
          "kind": "electrical",
          "unit": "",
          "min": 100,
          "typ": null,
          "max": 400,
          "conditions": "VCE=-2V,IC=-1A",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter saturation voltage",
          "symbol": "VCE(sat)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -0.5,
          "conditions": "IC=-2A,IB=-200mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Base-emitter saturation voltage",
          "symbol": "VBE(sat)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -2,
          "conditions": "IC=-2A,IB=-200mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Transition frequency",
          "symbol": "fT",
          "kind": "electrical",
          "unit": "MHz",
          "min": 80,
          "typ": null,
          "max": null,
          "conditions": "VCE=-5V,IC=-100mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector output capacitance",
          "symbol": "Cob",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 45,
          "conditions": "VCB=-10V,IE=0,f=1MHz",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "2sb776"
  ],
  "discovery_pitch": "2SB776 (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",
    "2sb776.kicad_sym",
    "2sb776.kicad_mod",
    "2sb776.glb",
    "2sb776.step",
    "2sb776.lbr",
    "docs/hero.png",
    "docs/2sb776-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "2sb776-hero.glb",
    "2sb776-hero.overlay.json",
    "2sb776-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}