main
Ray Set visibility: public 836180d 16d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "bd142",
  "title": "BD142",
  "brief": "SPTECH Bipolar (BJT), TO-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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  ],
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    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
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    "parts": {
      "symbol": "bd142.kicad_sym",
      "footprint": "bd142.kicad_mod",
      "model_3d": "bd142-etched.glb",
      "model_3d_plain": "bd142.glb",
      "model_3d_step": "bd142-etched.step",
      "model_3d_step_plain": "bd142.step",
      "lbr": "bd142.lbr"
    },
    "distributor_links": {
      "lcsc": "C2907836"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T09:50:35Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "error"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "B",
        "type": "input",
        "description": "Base; maximum base current 7 A and emitter-base voltage 7 V."
      },
      {
        "number": "2",
        "name": "E",
        "type": "passive",
        "description": "Emitter; collector current up to 15 A continuous."
      },
      {
        "number": "3",
        "name": "C",
        "type": "passive",
        "description": "Collector, connected to the metal case; VCBO 50 V, VCEO 45 V, IC 15 A continuous, 117 W dissipation at TC=25℃."
      }
    ],
    "provenance": {
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      "factory_chain": {
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        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet states the TO-3 package pins as 1 Base, 2 Emitter, 3 Collector (case). The collector i",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 2,
        "cost_usd": 0.155,
        "at": "2026-10-19T09:50:21"
      },
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        "pages": 2,
        "sha256": "a9db8707e503276d",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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    },
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        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
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        ],
        "zmin_mm": -10,
        "centre_offset_mm": 0.01,
        "footprint_binding": "identity",
        "sha256": "10d36da80a7f328482e27916f3044cc4bfec83922e402c41ed3552aa777116bb",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
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        "file": "bd142-etched.step",
        "role": "eda",
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        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
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        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "SPTECH",
      "Package": "TO-3",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    },
    "appearance": {
      "housing": {
        "quote": "IB Base Current 7 A PC Collector Power Dissipation@TC=25℃ 117 W",
        "page": 1,
        "doc": "ds.pdf",
        "material": "PC"
      },
      "version": 1,
      "datasheet_sha256": "a9db8707e503276d732022875c9acd8f0141d68ecfed4ca3ce48603967c1ea4d"
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    "characteristics": {
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          "symbol": "V(BR)CEO",
          "kind": "electrical",
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          "min": 45,
          "typ": null,
          "max": null,
          "conditions": "IC=10mA; IB=0",
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          "source": "datasheet"
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          "name": "Collector-Emitter Saturation Voltage",
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        },
        {
          "name": "Base-Emitter On Voltage",
          "symbol": "VBE(on)",
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        },
        {
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        },
        {
          "name": "Emitter Cutoff Current",
          "symbol": "IEBO",
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          "min": null,
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          "max": 1,
          "conditions": "VEB= 7V; IC= 0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "DC Current Gain",
          "symbol": "hFE-1",
          "kind": "electrical",
          "unit": "",
          "min": 12.5,
          "typ": null,
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          "unit": "",
          "min": 20,
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        },
        {
          "name": "Second Breakdown Collector Current with Base Forward Biased",
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          "min": 3,
          "typ": null,
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          "source_page": 2,
          "source": "datasheet"
        },
        {
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          "max": 50,
          "conditions": "Ta=25℃",
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          "source": "datasheet"
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          "name": "Collector-Emitter Voltage",
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        {
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        },
        {
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          "min": null,
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          "max": 7,
          "conditions": "Ta=25℃",
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        },
        {
          "name": "Collector Power Dissipation",
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          "unit": "W",
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          "typ": null,
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          "conditions": "TC=25℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
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          "unit": "℃",
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          "typ": null,
          "max": 200,
          "conditions": "Ta=25℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -65,
          "typ": null,
          "max": 200,
          "conditions": "Ta=25℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction to Case",
          "symbol": "Rth j-c",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
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        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
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  "discovery_triggers": [
    "bd142"
  ],
  "discovery_pitch": "BD142 (SPTECH) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "bd142.step",
    "bd142.lbr",
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    "viewers/symbol.html",
    "viewers/footprint.html"
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  "visibility": {
    "public": true
  }
}