2N5551

{
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  "type": "component",
  "slug": "2n5551",
  "title": "2N5551",
  "brief": "RUILON Shenzhen Ruilongyuan Elec 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",
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  "component": {
    "mpn": "2N5551",
    "manufacturer": "RUILON Shenzhen Ruilongyuan Elec",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602891778404474880",
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      "lbr": "2n5551.lbr"
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    "distributor_links": {
      "lcsc": "C7529570",
      "digikey": "4878-2N5551CT-ND",
      "mouser": "637-2N5551"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T00:34:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "4878-2N5551CT-ND",
        "status": "found",
        "lifecycle": "Active"
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        "pn": "637-2N5551",
        "status": "found"
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    },
    "pins": [
      {
        "number": "1",
        "name": "BASE",
        "type": "passive",
        "description": "Base terminal of the transistor; the datasheet limits for the device are VEBO 6 V (emitter-base) and continuous collector current IC 600 mA."
      },
      {
        "number": "2",
        "name": "EMITTER",
        "type": "passive",
        "description": "Emitter terminal; the datasheet gives an emitter-base breakdown voltage V(BR)EBO minimum of 6 V at IE = 10 µA."
      },
      {
        "number": "3",
        "name": "COLLECTOR",
        "type": "passive",
        "description": "Collector terminal; the datasheet limits are VCEO 160 V (collector-emitter) and continuous collector current IC 600 mA."
      }
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pinout taken from the SOT23 package drawing labels in the datasheet text: 1 = BASE, 2 = EMITTER, 3 =; The datasheet never states the transistor polarity explicitly (NPN/PNP). The part is a high-voltage ; Pin types are set to 'passive' following the KiCad convention for BJT terminals; the datasheet does "
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        "cost_usd": 0.0301,
        "at": "2026-10-09T00:33:17"
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        "sha256": "b5cf0a9a4c572402",
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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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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
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        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "RUILON Shenzhen Ruilongyuan Elec",
      "Package": "SOT-23",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
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          "name": "Collector-Emitter Breakdown Voltage",
          "symbol": "V(BR)CEO",
          "kind": "electrical",
          "unit": "V",
          "min": 160,
          "typ": null,
          "max": null,
          "conditions": "IC = 1.0 mA, IB = 0",
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        },
        {
          "name": "Collector-Base Breakdown Voltage",
          "symbol": "V(BR)CBO",
          "kind": "electrical",
          "unit": "V",
          "min": 180,
          "typ": null,
          "max": null,
          "conditions": "IC = 100µA, IE = 0",
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        },
        {
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          "symbol": "V(BR)EBO",
          "kind": "electrical",
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          "min": 6,
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          "max": null,
          "conditions": "IE = 10 µA, IC = 0",
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        {
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          "symbol": "ICBO",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
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          "conditions": "VCB = 120 V, IE = 0",
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          "source": "datasheet"
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        {
          "name": "Collector Cutoff Current",
          "symbol": "ICBO",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
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          "conditions": "VCB = 120 V, IE = 0, TA = 100°C",
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        {
          "name": "Emitter Cutoff Current",
          "symbol": "IEBO",
          "kind": "electrical",
          "unit": "nA",
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          "max": 50,
          "conditions": "VEB = 4.0 V, IC = 0",
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        {
          "name": "DC Current Gain",
          "symbol": "HFE",
          "kind": "electrical",
          "unit": "",
          "min": 80,
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          "max": null,
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          "symbol": "HFE",
          "kind": "electrical",
          "unit": "",
          "min": 30,
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        },
        {
          "name": "Collector-Emitter Saturation Voltage",
          "symbol": "VCE(S)",
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        {
          "name": "Collector-Emitter Saturation Voltage",
          "symbol": "VCE(S)",
          "kind": "electrical",
          "unit": "V",
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          "typ": null,
          "max": 0.15,
          "conditions": "IC = 50 mA, IB = 5.0 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Base-Emitter Saturation Voltage",
          "symbol": "VBE(S)",
          "kind": "electrical",
          "unit": "V",
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          "max": 1,
          "conditions": "IC = 10 mA, IB = 1.0 mA",
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        },
        {
          "name": "Collector Emitter Cut-off Current",
          "symbol": "ICES",
          "kind": "electrical",
          "unit": "nA",
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          "conditions": "VCB = 10 V",
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        {
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          "symbol": "ICES",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "VCB = 75 V",
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        {
          "name": "Collector-Emitter Voltage",
          "symbol": "VCEO",
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          "typ": null,
          "max": 160,
          "conditions": "",
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        {
          "name": "Collector-Base Voltage",
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          "conditions": "",
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          "name": "Collector Current - Continuous",
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          "name": "Junction and Storage Temperature",
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  "discovery_pitch": "2N5551 (RUILON Shenzhen Ruilongyuan Elec) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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