MJD127T4G

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  "title": "MJD127T4G",
  "brief": "MSKSEMI Bipolar (BJT), TO-252. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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    "mpn": "MJD127T4G",
    "manufacturer": "MSKSEMI",
    "package": "TO-252",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
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      "lcsc": "C22365382",
      "digikey": "MJD127T4GOSTR-ND",
      "mouser": "863-MJD127T4G"
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        "lifecycle": "Active"
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    "pins": [
      {
        "number": "1",
        "name": "BASE",
        "type": "input",
        "description": "Base terminal of the PNP device, with internal resistors R1 (typ. 5 kΩ) and R2 (typ. 210 Ω) shown in the datasheet schematic; emitter-base voltage limit is -5 V (VEBO)."
      },
      {
        "number": "2",
        "name": "COLLECTOR",
        "type": "passive",
        "description": "Collector terminal, rated for -8 A continuous collector current, -100 V VCBO and VCEO, and 1.5 W collector power dissipation."
      },
      {
        "number": "3",
        "name": "EMITTER",
        "type": "passive",
        "description": "Emitter terminal; a damper diode is built in between emitter and collector (E-C), per the datasheet features."
      }
    ],
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        "at": "2026-10-18T05:39:27"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
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        "refuses_to_fabricate": true
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
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  "metadata": {
    "specs": {
      "Manufacturer": "MSKSEMI",
      "Package": "TO-252",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    },
    "appearance": {
      "housing": {
        "quote": "COLLECTOR POWER DISSIPATION BASE-EMITTER SATURATION VOLTAGE VBEsat (V) COLLECTOR CURRENT IC (mA) DC CURRENT GAIN hFE PC (W)",
        "page": 4,
        "doc": "ds.pdf",
        "material": "PC"
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      "rows": [
        {
          "name": "Collector-base voltage",
          "symbol": "VCBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -100,
          "conditions": "Ta=25℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter voltage",
          "symbol": "VCEO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -100,
          "conditions": "Ta=25℃",
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        {
          "name": "Emitter-base voltage",
          "symbol": "VEBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -5,
          "conditions": "Ta=25℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector current, continuous",
          "symbol": "IC",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": -8,
          "conditions": "Ta=25℃",
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        {
          "name": "Collector power dissipation",
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          "min": null,
          "typ": null,
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          "conditions": "Ta=25℃",
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          "source": "datasheet"
        },
        {
          "name": "Operation junction and storage temperature range",
          "symbol": "TJ,Tstg",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "Ta=25℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-base breakdown voltage",
          "symbol": "V(BR)CBO",
          "kind": "electrical",
          "unit": "V",
          "min": -100,
          "typ": null,
          "max": null,
          "conditions": "IC=-1mA,IE=0",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter breakdown voltage",
          "symbol": "V(BR)CEO",
          "kind": "electrical",
          "unit": "V",
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          "typ": null,
          "max": null,
          "conditions": "IC=-30mA,IB=0",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Emitter-base breakdown voltage",
          "symbol": "V(BR)EBO",
          "kind": "electrical",
          "unit": "V",
          "min": -5,
          "typ": null,
          "max": null,
          "conditions": "IE=-10mA,IC=0",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Collector cut-off current",
          "symbol": "ICBO",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": -10,
          "conditions": "VCB=-100V,IE=0",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter cut-off current",
          "symbol": "ICEO",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": -10,
          "conditions": "VCE=-50V,IB=0",
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          "source": "datasheet"
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        {
          "name": "Emitter cut-off current",
          "symbol": "IEBO",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": -2,
          "conditions": "VEB=-5V,IC=0",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC current gain",
          "symbol": "hFE(1)",
          "kind": "electrical",
          "unit": "",
          "min": 1000,
          "typ": null,
          "max": 12000,
          "conditions": "VCE=-4V,IC=-4A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC current gain",
          "symbol": "hFE(2)",
          "kind": "electrical",
          "unit": "",
          "min": 100,
          "typ": null,
          "max": null,
          "conditions": "VCE=-4V,IC=-8A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter saturation voltage",
          "symbol": "VCE(sat) 1",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -2,
          "conditions": "IC=-4A,IB=-16mA; pulse test: pulse width≤380µs, duty cycle≤2%",
          "source_page": 3,
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        {
          "name": "Collector-emitter saturation voltage",
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          "unit": "V",
          "min": null,
          "typ": null,
          "max": -4,
          "conditions": "IC=-8A,IB=-80mA; pulse test: pulse width≤380µs, duty cycle≤2%",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Base-emitter saturation voltage",
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          "kind": "electrical",
          "unit": "V",
          "min": null,
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          "max": -4.5,
          "conditions": "IC=-8A,IB=-80mA; pulse test: pulse width≤380µs, duty cycle≤2%",
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          "name": "Base-emitter voltage",
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          "max": -2.8,
          "conditions": "VCE=-4V,IC=-4A; pulse test: pulse width≤380µs, duty cycle≤2%",
          "source_page": 3,
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        {
          "name": "Collector output capacitance",
          "symbol": "Cob",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "VCB=-10V,IE=0,f=0.1MHz",
          "source_page": 3,
          "source": "datasheet"
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    "name": "Ray",
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