TIP31C

{
  "schema_version": 1,
  "type": "component",
  "slug": "tip31c",
  "title": "TIP31C",
  "brief": "STMicroelectronics Bipolar (BJT), TO-220. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
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  "component": {
    "mpn": "TIP31C",
    "manufacturer": "STMicroelectronics",
    "package": "TO-220",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://www.st.com/resource/en/datasheet/tip31c.pdf",
    "parts": {
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      "footprint": "tip31c.kicad_mod",
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    "distributor_links": {
      "lcsc": "C13506"
    },
    "pins": [
      {
        "number": "1",
        "name": "Base",
        "type": "input",
        "description": "Base terminal of the NPN power transistor; base current IB is rated up to 1 A absolute maximum."
      },
      {
        "number": "2",
        "name": "Collector",
        "type": "passive",
        "description": "Collector terminal, internally connected to the metal mounting tab; rated for collector-emitter voltage up to 100 V and collector current up to 3 A (5 A peak)."
      },
      {
        "number": "3",
        "name": "Emitter",
        "type": "passive",
        "description": "Emitter terminal of the NPN power transistor; emitter-base voltage rated up to 5 V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
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        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 10,
        "cost_usd": 0.1174,
        "at": "2026-09-22T19:03:42"
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      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/tip31c.pdf",
        "pages": 10,
        "sha256": "01acd35a9e756d39",
        "source_tier": "mfr"
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      "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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      "footprint": "viewers/footprint.html"
    },
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        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
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          28.525
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        "zmin_mm": -9.75,
        "centre_offset_mm": 0.932,
        "footprint_binding": "identity",
        "sha256": "7cb065d935df5771f0ba6e48ddd180863a121af76483dad7f18e667a7b68204a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "TO-220",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "01acd35a9e756d39",
      "rows": [
        {
          "name": "Collector-base voltage",
          "symbol": "VCBO",
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          "typ": null,
          "max": 100,
          "conditions": "IE = 0",
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          "source": "datasheet"
        },
        {
          "name": "Collector-emitter voltage",
          "symbol": "VCEO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "IB = 0",
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        },
        {
          "name": "Emitter-base voltage",
          "symbol": "VEBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
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          "conditions": "IC = 0",
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        {
          "name": "Collector current",
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        {
          "name": "Collector peak current",
          "symbol": "ICM",
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          "typ": null,
          "max": 5,
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        },
        {
          "name": "Base current",
          "symbol": "IB",
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          "unit": "A",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "",
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        },
        {
          "name": "Total dissipation",
          "symbol": "PTOT",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "Tcase = 25°C",
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        },
        {
          "name": "Total dissipation",
          "symbol": "PTOT",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "Tamb = 25°C",
          "source_page": 3,
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        },
        {
          "name": "Storage temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
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        },
        {
          "name": "Max. operating junction temperature",
          "symbol": "TJ",
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          "unit": "°C",
          "min": null,
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        },
        {
          "name": "Collector cut-off current",
          "symbol": "ICEO",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "IB = 0, VCE = 60V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Emitter cut-off current",
          "symbol": "IEBO",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "IC = 0, VEB = 5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Collector cut-off current",
          "symbol": "ICES",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.2,
          "conditions": "VBE = 0, VCE = 100V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter sustaining voltage",
          "symbol": "VCEO(sus)",
          "kind": "electrical",
          "unit": "V",
          "min": 100,
          "typ": null,
          "max": null,
          "conditions": "IB = 0, IC = 30mA; pulsed duration = 300 ms, duty cycle ≥ 1.5%",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter saturation voltage",
          "symbol": "VCE(sat)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.2,
          "conditions": "IC = 3A, IB = 375mA; pulsed duration = 300 ms, duty cycle ≥ 1.5%",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Base-emitter voltage",
          "symbol": "VBE(on)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.8,
          "conditions": "IC = 3A, VCE = 4V",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  "discovery_pitch": "TIP31C (STMicroelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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  "visibility": {
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  "updated_at": "2026-09-25T09:41:10.976Z"
}