MMBTA28

{
  "slug": "mmbta28",
  "version": "0.1.0",
  "type": "component",
  "description": "YONGYUTAI Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "transistors-thyristors",
    "mmbta28",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mmbta28.kicad_sym",
    "mmbta28.kicad_mod",
    "mmbta28.glb",
    "mmbta28.step",
    "mmbta28.lbr",
    "docs/hero.png",
    "docs/mmbta28-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mmbta28-hero.glb",
    "mmbta28-hero.overlay.json",
    "mmbta28-etched.glb"
  ],
  "component": {
    "mpn": "MMBTA28",
    "manufacturer": "YONGYUTAI",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/90bb1993f41f31ae08e4a7f05a5891b4.pdf",
    "parts": {
      "symbol": "mmbta28.kicad_sym",
      "footprint": "mmbta28.kicad_mod",
      "model_3d": "mmbta28-hero.glb",
      "model_3d_plain": "mmbta28-etched.glb",
      "model_3d_step": "mmbta28-etched.step",
      "model_3d_step_plain": "mmbta28.step",
      "lbr": "mmbta28.lbr"
    },
    "distributor_links": {
      "lcsc": "C47147606"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T17:19:23Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BASE",
        "type": "passive",
        "description": "Base terminal of the NPN transistor; the datasheet rates emitter-base voltage VEBO at 12 V maximum and specifies V(BR)EBO of 12 V minimum at IE=10 µA."
      },
      {
        "number": "2",
        "name": "EMITTER",
        "type": "passive",
        "description": "Emitter terminal of the NPN transistor; the datasheet rates collector-emitter voltage VCEO at 80 V and emitter-base voltage VEBO at 12 V."
      },
      {
        "number": "3",
        "name": "COLLECTOR",
        "type": "passive",
        "description": "Collector terminal of the NPN transistor; the datasheet rates collector-base voltage VCBO at 80 V, collector current IC at 500 mA, and collector power dissipation PC at 200 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 SOT-23 pinout comes from the text listing '1.BASE 2.EMITTER 3.COLLECTOR' on page 1. The package "
        ],
        "pages_sent": 4,
        "cost_usd": 0.0197,
        "at": "2026-10-17T17:17:41"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/90bb1993f41f31ae08e4a7f05a5891b4.pdf",
        "pages": 4,
        "sha256": "548c9fea4f4bf7b5",
        "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": "mmbta28.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3.0,
          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mmbta28-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "45c308ac9deada6a8372757736e95e7a36c926401938e3a436a6c8ec0708a37b",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}