MMBTH81

{
  "schema_version": 1,
  "type": "component",
  "slug": "mmbth81",
  "title": "MMBTH81",
  "brief": "onsemi Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "transistors-thyristors",
    "mmbth81",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MMBTH81",
    "manufacturer": "onsemi",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586188983088910336",
    "parts": {
      "symbol": "mmbth81.kicad_sym",
      "footprint": "mmbth81.kicad_mod",
      "model_3d": "mmbth81-hero.glb",
      "model_3d_plain": "mmbth81.glb",
      "model_3d_step": "mmbth81-etched.step",
      "model_3d_step_plain": "mmbth81.step",
      "lbr": "mmbth81.lbr"
    },
    "distributor_links": {
      "lcsc": "C190349",
      "digikey": "MMBTH81TR-ND",
      "mouser": "512-MMBTH81"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T07:07:40Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "MMBTH81TR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "512-MMBTH81",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "B",
        "type": "passive",
        "description": "Base terminal of the PNP RF transistor; the datasheet's emitter-base reverse limit is VEBO 3.0 V and the IEBO test uses VEB = 2.0 V."
      },
      {
        "number": "2",
        "name": "E",
        "type": "passive",
        "description": "Emitter terminal of the PNP RF transistor; the datasheet rates the emitter-base breakdown at V(BR)EBO 3.0 V minimum with IE = 10 µA."
      },
      {
        "number": "3",
        "name": "C",
        "type": "passive",
        "description": "Collector terminal of the PNP RF transistor; the datasheet limits are VCEO 20 V, VCBO 20 V and continuous IC 50 mA."
      }
    ],
    "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 text gives the SOT-23 diagram labels only as 'C / B / E' with no printed pin numbers. ; The datasheet's electrical limits apply to a PNP device, so voltages and currents are negative in po"
        ],
        "pages_sent": 13,
        "cost_usd": 0.1463,
        "at": "2026-10-09T07:02:46"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586188983088910336",
        "pages": 13,
        "sha256": "6401dce6c10b9144",
        "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": "mmbth81.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mmbth81-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "7bd7ee9da5f809849018e0dd7cf2a6458ff13058eb7a2ddadba8377766bd9ab6",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "SOT-23",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "6401dce6c10b9144",
      "rows": [
        {
          "name": "Collector-Emitter Voltage",
          "symbol": "VCEO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-Base Voltage",
          "symbol": "VCBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Emitter-Base Voltage",
          "symbol": "VEBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 3,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector Current - Continuous",
          "symbol": "IC",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating and Storage Junction Temperature Range",
          "symbol": "TJ, Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Total Device Dissipation",
          "symbol": "PD",
          "kind": "thermal",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 225,
          "conditions": "TA = 25°C; device mounted on FR-4 PCB 1.6\" X 1.6\" X 0.06\"",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction to Ambient",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 556,
          "conditions": "Device mounted on FR-4 PCB 1.6\" X 1.6\" X 0.06\"",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction to Case",
          "symbol": "RθJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-Emitter Breakdown Voltage",
          "symbol": "V(BR)CEO",
          "kind": "electrical",
          "unit": "V",
          "min": 20,
          "typ": null,
          "max": null,
          "conditions": "IC = 1.0 mA, IB = 0",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Collector-Base Breakdown Voltage",
          "symbol": "V(BR)CBO",
          "kind": "electrical",
          "unit": "V",
          "min": 20,
          "typ": null,
          "max": null,
          "conditions": "IC = 10 µA, IE = 0",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Emitter-Base Breakdown Voltage",
          "symbol": "V(BR)EBO",
          "kind": "electrical",
          "unit": "V",
          "min": 3,
          "typ": null,
          "max": null,
          "conditions": "IE = 10 µA, IC = 0",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Collector Cutoff Current",
          "symbol": "ICBO",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "VCB = 10 V, IE = 0",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Emitter Cutoff Current",
          "symbol": "IEBO",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "VEB = 2.0 V, IC = 0",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC Current Gain",
          "symbol": "hFE",
          "kind": "electrical",
          "unit": "",
          "min": 60,
          "typ": null,
          "max": null,
          "conditions": "IC = 5.0 mA, VCE = 10 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Collector-Emitter Saturation Voltage",
          "symbol": "VCE(sat)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "IC = 5.0 mA, IB = 0.5 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Base-Emitter On Voltage",
          "symbol": "VBE(on)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.9,
          "conditions": "IC = 5.0 mA, VCE = 10 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Current Gain - Bandwidth Product",
          "symbol": "fT",
          "kind": "electrical",
          "unit": "MHz",
          "min": 600,
          "typ": null,
          "max": null,
          "conditions": "IC = 5.0 mA, VCE = 10 V, f = 100 MHz",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Collector-Base Capacitance",
          "symbol": "Ccb",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 0.85,
          "conditions": "VCB = 10 V, IE = 0, f = 1.0 MHz",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Collector Emitter Capacitance",
          "symbol": "Cce",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 0.65,
          "conditions": "VCB = 10 V, IB = 0, f = 1.0 MHz",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "mmbth81"
  ],
  "discovery_pitch": "MMBTH81 (onsemi) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mmbth81.kicad_sym",
    "mmbth81.kicad_mod",
    "mmbth81.glb",
    "mmbth81.step",
    "mmbth81.lbr",
    "docs/hero.png",
    "docs/mmbth81-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mmbth81-hero.glb",
    "mmbth81-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}