TIP42B

{
  "slug": "tip42b",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi Bipolar Transistors - BJT, TO-220-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "triode-mos tube-transistor",
    "tip42b",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tip42b.kicad_sym",
    "tip42b.kicad_mod",
    "tip42b.glb",
    "tip42b.step",
    "tip42b.lbr",
    "docs/hero.png",
    "docs/tip42b-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tip42b-hero.glb",
    "tip42b-hero.overlay.json",
    "tip42b-etched.glb"
  ],
  "component": {
    "mpn": "TIP42B",
    "manufacturer": "onsemi",
    "package": "TO-220-3",
    "pin_count": 3,
    "category": "Triode/MOS Tube/Transistor",
    "subcategory": "Bipolar Transistors - BJT",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/tip42b-d.pdf",
    "parts": {
      "symbol": "tip42b.kicad_sym",
      "footprint": "tip42b.kicad_mod",
      "model_3d": "tip42b-hero.glb",
      "model_3d_plain": "tip42b-etched.glb",
      "model_3d_step": "tip42b-etched.step",
      "model_3d_step_plain": "tip42b.step",
      "lbr": "tip42b.lbr"
    },
    "distributor_links": {
      "lcsc": "C3200976",
      "digikey": "2156-TIP42B-ON-ND",
      "mouser": "863-TIP42B"
    },
    "distributor_check": {
      "checked_at": "2026-11-02T17:18:15Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-TIP42B-ON-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "863-TIP42B",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Base",
        "type": "input",
        "description": "Base terminal of the PNP transistor; the datasheet gives a base current rating of -2 A (IB) as an absolute maximum."
      },
      {
        "number": "2",
        "name": "Collector",
        "type": "passive",
        "description": "Collector terminal of the PNP transistor; the datasheet gives a collector current rating of -6 A DC and -10 A pulse (IC, ICP) as absolute maximums."
      },
      {
        "number": "3",
        "name": "Emitter",
        "type": "passive",
        "description": "Emitter terminal of the PNP transistor; the datasheet gives an emitter-base voltage rating of -5 V (VEBO) as an absolute maximum."
      }
    ],
    "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-220 pinout only as a pin-name list on page 1 (1.Base 2.Collector 3.Emitte"
        ],
        "pages_sent": 5,
        "cost_usd": 0.0063,
        "at": "2026-11-02T17:18:00"
      },
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/tip42b-d.pdf",
        "pages": 5,
        "sha256": "6de79efcef19d13b",
        "source_tier": "mfr"
      },
      "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": "tip42b.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          10.25,
          4.455,
          28.525
        ],
        "zmin_mm": -9.75,
        "centre_offset_mm": 0.932,
        "footprint_binding": "identity",
        "sha256": "7cb065d935df5771f0ba6e48ddd180863a121af76483dad7f18e667a7b68204a",
        "checked": "2026-11-02",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tip42b-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": [
          10.25,
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        ],
        "zmin_mm": -9.75,
        "centre_offset_mm": 0.932,
        "footprint_binding": "identity",
        "sha256": "aeef02c8c1a94ff5e8ced9e27e78d6341718484e7c3265363b68389de4319f60",
        "checked": "2026-11-02",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}