main
Ray Set visibility: public 3980d4b 5h ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "2n4401tfr",
  "title": "2N4401TFR",
  "brief": "onsemi Bipolar (BJT), TO-92-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "transistors-thyristors",
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    "extractor-text"
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  "component": {
    "mpn": "2N4401TFR",
    "manufacturer": "onsemi",
    "package": "TO-92-3",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588895114546040833",
    "parts": {
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      "footprint": "2n4401tfr.kicad_mod",
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      "model_3d_plain": "2n4401tfr-etched.glb",
      "model_3d_step": "2n4401tfr-etched.step",
      "model_3d_step_plain": "2n4401tfr.step",
      "lbr": "2n4401tfr.lbr"
    },
    "distributor_links": {
      "lcsc": "C258189"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T15:03:07Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "EMITTER",
        "type": "passive",
        "description": "Emitter of the NPN transistor; the datasheet limits emitter-base voltage VEBO to 6.0 Vdc."
      },
      {
        "number": "2",
        "name": "BASE",
        "type": "passive",
        "description": "Base of the NPN transistor; the datasheet specifies VBE(sat) of 0.75 to 0.95 Vdc at IC = 150 mAdc, IB = 15 mAdc, and 1.2 Vdc maximum at IC = 500 mAdc, IB = 50 mAdc."
      },
      {
        "number": "3",
        "name": "COLLECTOR",
        "type": "passive",
        "description": "Collector of the NPN transistor; the datasheet limits collector-emitter voltage VCEO to 40 Vdc, collector-base voltage VCBO to 60 Vdc, and continuous collector current IC to 600 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: The MPN 2N4401TFR does not appear in the datasheet ordering table (which lists 2N4401, 2N4401G, 2N44; Pin types were assigned as 'passive' following the usual KiCad convention for BJT terminals; the dat"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0461,
        "at": "2026-10-18T15:02:54"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588895114546040833",
        "pages": 7,
        "sha256": "17be224434ed49e1",
        "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"
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        "file": "2n4401tfr.step",
        "role": "plain",
        "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": "f0b61c32ecbf0067157adc5a3d4966ceadf5d6dafe93c51af35f76c41c71a54a",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "2n4401tfr-etched.step",
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        "sha256": "65b68d27c7e2d3c386da5bdc43a1ae677f27f06899abedb96242fcd3323a8376",
        "checked": "2026-10-18",
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      "Package": "TO-92-3",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
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        {
          "name": "Emitter-Base Breakdown Voltage",
          "symbol": "V(BR)EBO",
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          "min": 6,
          "typ": null,
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          "conditions": "IE = 0.1 mAdc, IC = 0",
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        },
        {
          "name": "Base Cutoff Current",
          "symbol": "IBEV",
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          "unit": "Adc",
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          "conditions": "VCE = 35 Vdc, VEB = 0.4 Vdc",
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          "conditions": "IC = 150 mAdc, VCE = 1.0 Vdc",
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        },
        {
          "name": "Collector-Emitter Saturation Voltage",
          "symbol": "VCE(sat)",
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        {
          "name": "Collector-Emitter Saturation Voltage",
          "symbol": "VCE(sat)",
          "kind": "electrical",
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        {
          "name": "Base-Emitter Saturation Voltage",
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          "min": 0.75,
          "typ": null,
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        {
          "name": "Base-Emitter Saturation Voltage",
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          "unit": "Vdc",
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          "conditions": "IC = 500 mAdc, IB = 50 mAdc",
          "source_page": 2,
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        },
        {
          "name": "Current-Gain - Bandwidth Product",
          "symbol": "fT",
          "kind": "electrical",
          "unit": "MHz",
          "min": 250,
          "typ": null,
          "max": null,
          "conditions": "IC = 20 mAdc, VCE = 10 Vdc, f = 100 MHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-Base Capacitance",
          "symbol": "Ccb",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
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          "max": 6.5,
          "conditions": "VCB = 5.0 Vdc, IE = 0, f = 1.0 MHz",
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        {
          "name": "Emitter-Base Capacitance",
          "symbol": "Ceb",
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          "conditions": "VEB = 0.5 Vdc, IC = 0, f = 1.0 MHz",
          "source_page": 2,
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        {
          "name": "Input Impedance",
          "symbol": "hie",
          "kind": "electrical",
          "unit": "k",
          "min": 1,
          "typ": null,
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          "conditions": "IC = 1.0 mAdc, VCE = 10 Vdc, f = 1.0 kHz",
          "source_page": 2,
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        {
          "name": "Voltage Feedback Ratio",
          "symbol": "hre",
          "kind": "electrical",
          "unit": "X 10-4",
          "min": 0.1,
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          "conditions": "IC = 1.0 mAdc, VCE = 10 Vdc, f = 1.0 kHz",
          "source_page": 2,
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        {
          "name": "Small-Signal Current Gain",
          "symbol": "hfe",
          "kind": "electrical",
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          "conditions": "IC = 1.0 mAdc, VCE = 10 Vdc, f = 1.0 kHz",
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        {
          "name": "Output Admittance",
          "symbol": "hoe",
          "kind": "electrical",
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          "conditions": "IC = 1.0 mAdc, VCE = 10 Vdc, f = 1.0 kHz",
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        {
          "name": "Delay Time",
          "symbol": "td",
          "kind": "timing",
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          "conditions": "VCC = 30 Vdc, VBE = 2.0 Vdc, IC = 150 mAdc, IB1 = 15 mAdc",
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        {
          "name": "Rise Time",
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          "kind": "timing",
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          "conditions": "",
          "source_page": 2,
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        {
          "name": "Storage Time",
          "symbol": "ts",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 225,
          "conditions": "VCC = 30 Vdc, IC = 150 mAdc, IB1 = IB2 = 15 mAdc",
          "source_page": 2,
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        },
        {
          "name": "Fall Time",
          "symbol": "tf",
          "kind": "timing",
          "unit": "ns",
          "min": null,
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        },
        {
          "name": "Collector-Emitter Voltage",
          "symbol": "VCEO",
          "kind": "absolute_maximum",
          "unit": "Vdc",
          "min": null,
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          "conditions": "Maximum rating",
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        },
        {
          "name": "Collector-Base Voltage",
          "symbol": "VCBO",
          "kind": "absolute_maximum",
          "unit": "Vdc",
          "min": null,
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        {
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          "name": "Total Device Dissipation",
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          "unit": "mW",
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          "conditions": "TC = 25°C",
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        },
        {
          "name": "Operating and Storage Junction Temperature Range",
          "symbol": "TJ, Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
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        {
          "name": "Thermal Resistance, Junction-to-Ambient",
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        {
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          "kind": "thermal",
          "unit": "°C/W",
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  "discovery_pitch": "2N4401TFR (onsemi) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}