MJD31CT4

{
  "schema_version": 1,
  "type": "component",
  "slug": "mjd31ct4",
  "title": "MJD31CT4",
  "brief": "STMicroelectronics Bipolar (BJT), DPAK. 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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    "transistors-thyristors",
    "mjd31ct4",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "MJD31CT4",
    "manufacturer": "STMicroelectronics",
    "package": "DPAK",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://www.st.com/resource/en/datasheet/mjd31ct4.pdf",
    "parts": {
      "symbol": "mjd31ct4.kicad_sym",
      "footprint": "mjd31ct4.kicad_mod",
      "model_3d": "mjd31ct4-etched.glb",
      "model_3d_plain": "mjd31ct4.glb",
      "model_3d_step": "mjd31ct4-etched.step",
      "model_3d_step_plain": "mjd31ct4.step",
      "lbr": "mjd31ct4.lbr"
    },
    "distributor_links": {
      "lcsc": "C2969834"
    },
    "pins": [
      {
        "number": "1",
        "name": "B",
        "type": "input",
        "description": "Base control terminal with absolute maximum input current rating of 1 A for controlling collector current."
      },
      {
        "number": "2",
        "name": "C",
        "type": "output",
        "description": "Collector terminal with TAB providing thermal connection, rated for maximum 3 A continuous current and 100 V collector-emitter voltage."
      },
      {
        "number": "3",
        "name": "E",
        "type": "output",
        "description": "Emitter terminal providing the return current path for this NPN power transistor."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "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": 13,
        "cost_usd": 0.0747,
        "at": "2026-09-22T17:53:20"
      },
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/mjd31ct4.pdf",
        "pages": 13,
        "sha256": "339d9033aceba953",
        "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": [
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        "file": "mjd31ct4.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9.9,
          6.5,
          2.32
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3eb4c99603a4fe837c2fe9308bc174769ded87a785a0df48d2dc441432ee8b4c",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mjd31ct4-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          2.32
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "f486856bb25e4c05a2583ae8cfc7fa03ffda0f46676f0e44a592628f9b0d2f70",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "DPAK",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "mjd31ct4"
  ],
  "discovery_pitch": "MJD31CT4 (STMicroelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mjd31ct4.kicad_sym",
    "mjd31ct4.kicad_mod",
    "mjd31ct4.glb",
    "mjd31ct4.step",
    "mjd31ct4.lbr",
    "docs/hero.png",
    "docs/mjd31ct4-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-25T02:04:17.828Z"
}