KTC4379-Y-RTF

{
  "slug": "ktc4379-y-rtf",
  "version": "0.1.0",
  "type": "component",
  "description": "KEC Semicon Bipolar Transistors - BJT, SOT-89. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "triode-mos tube-transistor",
    "ktc4379-y-rtf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ktc4379-y-rtf.kicad_sym",
    "ktc4379-y-rtf.kicad_mod",
    "ktc4379-y-rtf.glb",
    "ktc4379-y-rtf.step",
    "ktc4379-y-rtf.lbr",
    "docs/hero.png",
    "docs/ktc4379-y-rtf-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ktc4379-y-rtf-hero.glb",
    "ktc4379-y-rtf-hero.overlay.json",
    "ktc4379-y-rtf-etched.glb"
  ],
  "component": {
    "mpn": "KTC4379-Y-RTF",
    "manufacturer": "KEC Semicon",
    "package": "SOT-89",
    "pin_count": 3,
    "category": "Triode/MOS Tube/Transistor",
    "subcategory": "Bipolar Transistors - BJT",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/fa45f498f8699cd5dd5eb6de04d96f45.pdf",
    "parts": {
      "symbol": "ktc4379-y-rtf.kicad_sym",
      "footprint": "ktc4379-y-rtf.kicad_mod",
      "model_3d": "ktc4379-y-rtf-hero.glb",
      "model_3d_plain": "ktc4379-y-rtf-etched.glb",
      "model_3d_step": "ktc4379-y-rtf-etched.step",
      "model_3d_step_plain": "ktc4379-y-rtf.step",
      "lbr": "ktc4379-y-rtf.lbr"
    },
    "distributor_links": {
      "lcsc": "C5274819"
    },
    "distributor_check": {
      "checked_at": "2026-11-05T03:47:34Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BASE",
        "type": "input",
        "description": "Base terminal of the NPN transistor, labelled BASE in the SOT-89 pin figure."
      },
      {
        "number": "2",
        "name": "COLLECTOR (HEAT SINK)",
        "type": "passive",
        "description": "Collector terminal, which is also the heat sink tab of the SOT-89 package, as labelled in the pin figure."
      },
      {
        "number": "3",
        "name": "EMITTER",
        "type": "passive",
        "description": "Emitter terminal of the NPN transistor, labelled EMITTER in the SOT-89 pin figure."
      }
    ],
    "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 SOT-89 pin names only. It states no per-pin electrical limits or functions b"
        ],
        "pages_sent": 4,
        "cost_usd": 0.0249,
        "at": "2026-11-05T03:47:27"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/fa45f498f8699cd5dd5eb6de04d96f45.pdf",
        "pages": 4,
        "sha256": "f54b49df81db07d0",
        "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": "ktc4379-y-rtf.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.5,
          1.52
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "844c0bb504d0c383535d9845c6376fe7a4053241a2ede8d8ef694df3fcfc37c8",
        "checked": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ktc4379-y-rtf-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.5,
          1.52
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "ba7fa5601658c913be432119ec688116c322703045d3bf5cc7f4c548ca799fc5",
        "checked": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "SOT-89",
      "source_page": 1,
      "D": {
        "nom_mm": 4.7,
        "range_mm": [
          null,
          4.7
        ]
      },
      "E1": {
        "nom_mm": 2.5,
        "range_mm": [
          null,
          null
        ]
      },
      "e": {
        "nom_mm": 1.5,
        "range_mm": [
          null,
          null
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "ktc4379-y-rtf.step",
        "verdict": "SKIP",
        "reasons": [
          "the datasheet dimensions give no height or body size to compare"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}