main
Ray Set visibility: public d26d561 17d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "mmbt4124lt1g",
  "title": "MMBT4124LT1G",
  "brief": "onsemi Bipolar (BJT), SOT-23-3. 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",
    "mmbt4124lt1g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MMBT4124LT1G",
    "manufacturer": "onsemi",
    "package": "SOT-23-3",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588928606727262208",
    "parts": {
      "symbol": "mmbt4124lt1g.kicad_sym",
      "footprint": "mmbt4124lt1g.kicad_mod",
      "model_3d": "mmbt4124lt1g-hero.glb",
      "model_3d_plain": "mmbt4124lt1g-etched.glb",
      "model_3d_step": "mmbt4124lt1g-etched.step",
      "model_3d_step_plain": "mmbt4124lt1g.step",
      "lbr": "mmbt4124lt1g.lbr"
    },
    "distributor_links": {
      "lcsc": "C891691"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T23:35:49Z",
      "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 NPN general-purpose transistor; the datasheet specifies emitter-base voltage VEBO of 5.0 Vdc maximum and emitter-base breakdown V(BR)EBO of 5.0 Vdc minimum."
      },
      {
        "number": "2",
        "name": "EMITTER",
        "type": "passive",
        "description": "Emitter terminal of the NPN general-purpose transistor; collector-emitter voltage is limited to VCEO 25 Vdc and continuous collector current to 200 mAdc."
      },
      {
        "number": "3",
        "name": "COLLECTOR",
        "type": "passive",
        "description": "Collector terminal of the NPN general-purpose transistor; collector-base voltage is limited to VCBO 30 Vdc and continuous collector current to 200 mAdc."
      }
    ],
    "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: Pin numbers and names come from the STYLE 6 outline on page 6 (PIN 1 BASE, PIN 2 EMITTER, PIN 3 COLL; The datasheet's page 6 outline lists many package styles (STYLE 1 through STYLE 28). Only STYLE 6 ap"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0078,
        "at": "2026-10-17T23:34:09"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588928606727262208",
        "pages": 7,
        "sha256": "5da228e2bb1af360",
        "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": "mmbt4124lt1g.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": "16964b14f93e6c778288a0c110b35f670fab733109c26f0da7dfc07cc3350040",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mmbt4124lt1g-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": "772ce986c0393957c98d8ade6fdfcb3dd64b258038c419db6cd889a7a2156620",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "SOT-23-3",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "5da228e2bb1af3603c99d6238d855784f4e0e7bc3144d1f123124718d367cf93",
      "rows": [
        {
          "name": "Collector−Emitter Breakdown Voltage",
          "symbol": "V(BR)CEO",
          "kind": "electrical",
          "unit": "Vdc",
          "min": 25,
          "typ": null,
          "max": null,
          "conditions": "IC = 1.0 mAdc, IE = 0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector−Base Breakdown Voltage",
          "symbol": "V(BR)CBO",
          "kind": "electrical",
          "unit": "Vdc",
          "min": 30,
          "typ": null,
          "max": null,
          "conditions": "IC = 10 Adc, IE = 0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Emitter−Base Breakdown Voltage",
          "symbol": "V(BR)EBO",
          "kind": "electrical",
          "unit": "Vdc",
          "min": 5,
          "typ": null,
          "max": null,
          "conditions": "IE = 10 Adc, IC = 0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector Cutoff Current",
          "symbol": "ICBO",
          "kind": "electrical",
          "unit": "nAdc",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "VCB = 20 Vdc, IE = 0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Emitter Cutoff Current",
          "symbol": "IEBO",
          "kind": "electrical",
          "unit": "nAdc",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "VEB = 3.0 Vdc, IC = 0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "DC Current Gain",
          "symbol": "hFE",
          "kind": "electrical",
          "unit": "−",
          "min": 120,
          "typ": null,
          "max": 360,
          "conditions": "IC = 2.0 mAdc, VCE = 1.0 Vdc",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "DC Current Gain",
          "symbol": "hFE",
          "kind": "electrical",
          "unit": "−",
          "min": 60,
          "typ": null,
          "max": null,
          "conditions": "IC = 50 mAdc, VCE = 1.0 Vdc",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector−Emitter Saturation Voltage",
          "symbol": "VCE(sat)",
          "kind": "electrical",
          "unit": "Vdc",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "IC = 50 mAdc, IB = 5.0 mAdc",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Base−Emitter Saturation Voltage",
          "symbol": "VBE(sat)",
          "kind": "electrical",
          "unit": "Vdc",
          "min": null,
          "typ": null,
          "max": 0.95,
          "conditions": "IC = 50 mAdc, IB = 5.0 mAdc",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Current−Gain − Bandwidth Product",
          "symbol": "fT",
          "kind": "electrical",
          "unit": "MHz",
          "min": 300,
          "typ": null,
          "max": null,
          "conditions": "IC = 10 mAdc, VCE = 20 Vdc, f = 100 MHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input Capacitance",
          "symbol": "Cibo",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 8,
          "conditions": "VEB = 0.5 Vdc, IC = 0, f = 1.0 MHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector−Base Capacitance",
          "symbol": "Ccb",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "IE = 0, VCB = 5.0 V, f = 1.0 MHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Small−Signal Current Gain",
          "symbol": "hfe",
          "kind": "electrical",
          "unit": "−",
          "min": 120,
          "typ": null,
          "max": 480,
          "conditions": "IC = 2.0 mAdc, VCE = 10 Vdc, RS = 10 k, f = 1.0 kHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Current Gain − High Frequency",
          "symbol": "|hfe|",
          "kind": "electrical",
          "unit": "−",
          "min": 3,
          "typ": null,
          "max": null,
          "conditions": "IC = 10 mAdc, VCE = 20 Vdc, f = 100 MHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Current Gain − High Frequency",
          "symbol": "|hfe|",
          "kind": "electrical",
          "unit": "−",
          "min": 120,
          "typ": null,
          "max": 480,
          "conditions": "IC = 2.0 mAdc, VCE = 10 V, f = 1.0 kHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Noise Figure",
          "symbol": "NF",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "IC = 100 Adc, VCE = 5.0 Vdc, RS = 1.0 k, f = 1.0 kHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector−Emitter Voltage",
          "symbol": "VCEO",
          "kind": "absolute_maximum",
          "unit": "Vdc",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector−Base Voltage",
          "symbol": "VCBO",
          "kind": "absolute_maximum",
          "unit": "Vdc",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Emitter−Base Voltage",
          "symbol": "VEBO",
          "kind": "absolute_maximum",
          "unit": "Vdc",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector Current − Continuous",
          "symbol": "IC",
          "kind": "absolute_maximum",
          "unit": "mAdc",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Total Device Dissipation, FR−5 Board",
          "symbol": "PD",
          "kind": "thermal",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 225,
          "conditions": "FR−5 Board (Note 1) @ TA = 25°C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction−to−Ambient, FR−5 Board",
          "symbol": "RJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 556,
          "conditions": "FR−5 Board (Note 1)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Total Device Dissipation, Alumina Substrate",
          "symbol": "PD",
          "kind": "thermal",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "Alumina Substrate (Note 2) @ TA = 25°C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction−to−Ambient, Alumina Substrate",
          "symbol": "RJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 417,
          "conditions": "Alumina Substrate (Note 2)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Junction and Storage Temperature",
          "symbol": "TJ, Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "mmbt4124lt1g"
  ],
  "discovery_pitch": "MMBT4124LT1G (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",
    "mmbt4124lt1g.kicad_sym",
    "mmbt4124lt1g.kicad_mod",
    "mmbt4124lt1g.glb",
    "mmbt4124lt1g.step",
    "mmbt4124lt1g.lbr",
    "docs/hero.png",
    "docs/mmbt4124lt1g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mmbt4124lt1g-hero.glb",
    "mmbt4124lt1g-hero.overlay.json",
    "mmbt4124lt1g-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}