CZT31C

{
  "slug": "czt31c",
  "version": "0.1.0",
  "type": "component",
  "description": "Changjing Bipolar (BJT), SOT-223. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "transistors-thyristors",
    "czt31c",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "czt31c.kicad_sym",
    "czt31c.kicad_mod",
    "czt31c.glb",
    "czt31c.step",
    "czt31c.lbr",
    "docs/hero.png",
    "docs/czt31c-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "czt31c-hero.glb",
    "czt31c-hero.overlay.json",
    "czt31c-etched.glb"
  ],
  "component": {
    "mpn": "CZT31C",
    "manufacturer": "Changjing",
    "package": "SOT-223",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588944431127146496",
    "parts": {
      "symbol": "czt31c.kicad_sym",
      "footprint": "czt31c.kicad_mod",
      "model_3d": "czt31c-hero.glb",
      "model_3d_plain": "czt31c-etched.glb",
      "model_3d_step": "czt31c-etched.step",
      "model_3d_step_plain": "czt31c.step",
      "lbr": "czt31c.lbr"
    },
    "distributor_links": {
      "lcsc": "C2875434"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T23:03:23Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BASE",
        "type": "input",
        "description": "Base terminal of the CZT31C NPN transistor; the datasheet gives VBE of 1.8 V max at VCE=4 V, IC=3 A, and emitter-base breakdown of 5 V min."
      },
      {
        "number": "2",
        "name": "COLLECTOR",
        "type": "passive",
        "description": "Collector terminal rated for VCBO and VCEO of 100 V and continuous collector current of 3 A, with VCE(sat) of 1.2 V at IC=3.0 A and IB=375 mA."
      },
      {
        "number": "3",
        "name": "EMITTER",
        "type": "passive",
        "description": "Emitter terminal of the NPN device; the datasheet specifies emitter-base voltage VEBO of 5 V and states the part is complementary to CZT32C."
      }
    ],
    "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 lists only three pins (1 BASE, 2 COLLECTOR, 3 EMITTER) for the SOT-223 package and doe; Pin types are inferred from the transistor function using KiCad classes (base as input, collector an"
        ],
        "pages_sent": 4,
        "cost_usd": 0.0274,
        "at": "2026-10-18T23:01:24"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588944431127146496",
        "pages": 4,
        "sha256": "80f563bfeeed236f",
        "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": "czt31c.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.0,
          6.5,
          1.7
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "77ad6dbacc493cb619c728f26d2ddcf461eb0feb6b977b47d01d51e67016f654",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "czt31c-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.0,
          6.5,
          1.7
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "8a054be403c73b5961252263ca22dbed0d69f540cef397acd7ab3dcece473f46",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}