S8550D331

{
  "slug": "s8550d331",
  "version": "0.1.0",
  "type": "component",
  "description": "ALJ Bipolar (BJT), TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "transistors-thyristors",
    "s8550d331",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "s8550d331.kicad_sym",
    "s8550d331.kicad_mod",
    "s8550d331.glb",
    "s8550d331.step",
    "s8550d331.lbr",
    "docs/hero.png",
    "docs/s8550d331-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "s8550d331-hero.glb",
    "s8550d331-hero.overlay.json",
    "s8550d331-etched.glb"
  ],
  "component": {
    "mpn": "S8550D331",
    "manufacturer": "ALJ",
    "package": "TO-92",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603352155009003520",
    "parts": {
      "symbol": "s8550d331.kicad_sym",
      "footprint": "s8550d331.kicad_mod",
      "model_3d": "s8550d331-hero.glb",
      "model_3d_plain": "s8550d331-etched.glb",
      "model_3d_step": "s8550d331-etched.step",
      "model_3d_step_plain": "s8550d331.step",
      "lbr": "s8550d331.lbr"
    },
    "distributor_links": {
      "lcsc": "C22751470"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T01:54:53Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Emitter",
        "type": "passive",
        "description": "Emitter terminal of the PNP transistor; the datasheet's absolute maximum emitter-base voltage VEBO is -5 V and emitter-base breakdown V(BR)EBO is -5 V at IE=-100µA."
      },
      {
        "number": "2",
        "name": "Base",
        "type": "passive",
        "description": "Base terminal; the datasheet's saturation test uses IB=-50mA with IC=-500mA, giving VBE(sat) of -1.2 V max, and emitter-base cut-off current IEBO is -100 nA max at VEB=-3V."
      },
      {
        "number": "3",
        "name": "Collector",
        "type": "passive",
        "description": "Collector terminal; the datasheet limits are VCBO -40 V, VCEO -25 V, IC -800 mA and PC 625 mW."
      }
    ],
    "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 pin list only as a numbered legend (1. Emitter, 2. Base, 3. Collector) with ; The MPN suffix 'D331' (packing/variant code) is not explained anywhere in the text. The package is c; The pin types are assigned as 'passive' because the datasheet does not classify BJT terminals; they "
        ],
        "pages_sent": 2,
        "cost_usd": 0.0104,
        "at": "2026-10-18T01:52:56"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603352155009003520",
        "pages": 2,
        "sha256": "81c15b1760cef7cf",
        "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": "s8550d331.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          4.83,
          3.745,
          9.8
        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
        "sha256": "f0b61c32ecbf0067157adc5a3d4966ceadf5d6dafe93c51af35f76c41c71a54a",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "s8550d331-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": [
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        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
        "sha256": "459514e9799a371822ec950f4601bdcd075142d67e9028e2a6cfba2c552a7211",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}