ZTX551

{
  "schema_version": 1,
  "type": "component",
  "slug": "ztx551",
  "title": "ZTX551",
  "brief": "Diodes Incorporated Bipolar (BJT), TO-92. 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",
    "ztx551",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ZTX551",
    "manufacturer": "Diodes Incorporated",
    "package": "TO-92",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
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      "footprint": "ztx551.kicad_mod",
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      "lbr": "ztx551.lbr"
    },
    "distributor_links": {
      "lcsc": "C460763",
      "digikey": "ZTX551-ND",
      "mouser": "522-ZTX551"
    },
    "distributor_check": {
      "checked_at": "2026-10-15T19:37:39Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "ZTX551-ND",
        "status": "found",
        "lifecycle": "Last Time Buy"
      },
      "mouser": {
        "pn": "522-ZTX551",
        "status": "found",
        "lifecycle": "End of Life"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "C",
        "type": "passive",
        "description": "Collector; PNP collector with VCEO of -65V (ZTX551), continuous IC of -1A and peak pulse ICM of -2A."
      },
      {
        "number": "2",
        "name": "B",
        "type": "passive",
        "description": "Base; the emitter-base voltage VEBO is limited to -5V."
      },
      {
        "number": "3",
        "name": "E",
        "type": "passive",
        "description": "Emitter; the device symbol shows the emitter arrow pointing into the emitter (PNP)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The pinout drawing (rounded face view, leads down, and bottom view) shows C B E left to right. The d",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 6,
        "cost_usd": 0.1484,
        "at": "2026-10-15T19:37:25"
      },
      "datasheet": {
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        "pages": 6,
        "sha256": "76f60ee5e422f8a2",
        "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": "ztx551.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          4.83,
          3.745,
          9.8
        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
        "sha256": "f0b61c32ecbf0067157adc5a3d4966ceadf5d6dafe93c51af35f76c41c71a54a",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ztx551-etched.step",
        "role": "eda",
        "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,
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        "sha256": "8460dbe674659583699ce3b1a9fdea49bea095213a01e3b27c150dea907d6af0",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Diodes Incorporated",
      "Package": "TO-92",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "76f60ee5e422f8a27c191b5a43db2afbec04b1afe2e2d8bf2fb28e8c403cc3cd",
      "rows": [
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          "name": "Collector-Base Breakdown Voltage (ZTX551)",
          "symbol": "BVCBO",
          "kind": "electrical",
          "unit": "V",
          "min": -80,
          "typ": null,
          "max": null,
          "conditions": "IC = -100µA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Collector-Emitter Breakdown Voltage (ZTX551)",
          "symbol": "BVCEO",
          "kind": "electrical",
          "unit": "V",
          "min": -65,
          "typ": null,
          "max": null,
          "conditions": "IC = -10mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Emitter-Base Breakdown Voltage",
          "symbol": "BVEBO",
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          "typ": null,
          "max": null,
          "conditions": "IE = -100µA",
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          "source": "datasheet"
        },
        {
          "name": "Collector Cut-off Current (ZTX551)",
          "symbol": "ICBO",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": -0.1,
          "conditions": "VCB = -65V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Emitter Cut-off Current",
          "symbol": "IEBO",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": -0.1,
          "conditions": "VEB = -4V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Collector-Emitter Saturation Voltage (ZTX551)",
          "symbol": "VCE(sat)",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": -350,
          "conditions": "IC = -150mA, IB = -15mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Base-Emitter Saturation Voltage",
          "symbol": "VBE(sat)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -1.1,
          "conditions": "IC = -150mA, IB = -15mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC Current Gain (ZTX551)",
          "symbol": "hFE",
          "kind": "electrical",
          "unit": "",
          "min": 50,
          "typ": null,
          "max": 150,
          "conditions": "IC = -150mA, VCE = -10V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "DC Current Gain (ZTX551)",
          "symbol": "hFE",
          "kind": "electrical",
          "unit": "",
          "min": 10,
          "typ": null,
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          "conditions": "IC = -1A, VCE = -10V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Collector-Base Voltage (ZTX551)",
          "symbol": "VCBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -80,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-Emitter Voltage (ZTX551)",
          "symbol": "VCEO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -65,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Emitter-Base Voltage",
          "symbol": "VEBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -5,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Continuous Collector Current",
          "symbol": "IC",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": -1,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Peak Pulse Current",
          "symbol": "ICM",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": -2,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1.5,
          "conditions": "Note 5: through-hole at seating plane, 2.5mm lead length, collector lead on 25mm x 25mm 1oz Cu, single-sided FR4, still air",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "Note 6: minimum recommended pad layout, 12mm lead length, still air",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction to Ambient",
          "symbol": "RJA",
          "kind": "thermal",
          "unit": "C/W",
          "min": null,
          "typ": null,
          "max": 116,
          "conditions": "Note 5: as PD note 5",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction to Ambient",
          "symbol": "RJA",
          "kind": "thermal",
          "unit": "C/W",
          "min": null,
          "typ": null,
          "max": 175,
          "conditions": "Note 6: as PD note 6",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction to Lead",
          "symbol": "RJL",
          "kind": "thermal",
          "unit": "C/W",
          "min": null,
          "typ": null,
          "max": 63.75,
          "conditions": "Note 7: junction to solder point at seating plane, 2.5mm from package bottom along collector lead",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating and Storage Temperature Range",
          "symbol": "TJ, TSTG",
          "kind": "absolute_maximum",
          "unit": "C",
          "min": -55,
          "typ": null,
          "max": 200,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Electrostatic Discharge - Human Body Model",
          "symbol": "ESD HBM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 4000,
          "conditions": "JEDEC Class 3A, JESD22-A114",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Electrostatic Discharge - Machine Model",
          "symbol": "ESD MM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "JEDEC Class C, JESD22-A115",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "ZTX551 (Diodes Incorporated) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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  "visibility": {
    "public": true
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}