main
Ray Set visibility: public 600850a 17d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "lmbz5229blt1g",
  "title": "LMBZ5229BLT1G",
  "brief": "LRC Zener Diodes, 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",
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  "component": {
    "mpn": "LMBZ5229BLT1G",
    "manufacturer": "LRC",
    "package": "SOT-23-3",
    "pin_count": 3,
    "category": "Diodes",
    "subcategory": "Zener Diodes",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590226493000753153",
    "parts": {
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      "footprint": "lmbz5229blt1g.kicad_mod",
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      "model_3d_step": "lmbz5229blt1g-etched.step",
      "model_3d_step_plain": "lmbz5229blt1g.step",
      "lbr": "lmbz5229blt1g.lbr"
    },
    "distributor_links": {
      "lcsc": "C131771"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T02:55:32Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Anode",
        "type": "passive",
        "description": "Anode terminal of the Zener diode per the stated pinout (1-Anode); the datasheet gives no pin-specific voltage or current limit for this terminal beyond the device ratings."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection; the datasheet lists pin 2 as No Connection and it should be left unconnected."
      },
      {
        "number": "3",
        "name": "Cathode",
        "type": "passive",
        "description": "Cathode terminal, identified by the polarity band on the package; the device is a Zener regulator with nominal VZ of 4.3 V (4.08 V min, 4.52 V max) at IZT 20 mA for LMBZ5229BLT1G."
      }
    ],
    "provenance": {
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      "factory_chain": {
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        "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 datasheet gives no electrical limits specific to the anode or cathode pins; the descriptions ref"
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        "pages_sent": 6,
        "cost_usd": 0.0387,
        "at": "2026-10-17T02:55:16"
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      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590226493000753153",
        "pages": 6,
        "sha256": "2c2e315ad416a912",
        "source_tier": "lcsc"
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      "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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    "models_3d": [
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        "file": "lmbz5229blt1g.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": "lmbz5229blt1g-etched.step",
        "role": "eda",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
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        "sha256": "093ffb15ce6f6a654bf923aadce333f8242115dc9ef23aa8fe1e30d541d7602c",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "LRC",
      "Package": "SOT-23-3",
      "Category": "Diodes",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "2c2e315ad416a912e3eb6ac9564c9577e789c64a8bbb6d142502de89a98583ae",
      "rows": [
        {
          "name": "Reverse Zener Voltage (VZ), nominal 4.3 V",
          "symbol": "VZ",
          "kind": "tolerance",
          "unit": "Volts",
          "min": 4.08,
          "typ": 4.3,
          "max": 4.52,
          "conditions": "@ IZT = 20 mA; pulse test at TA = 25°C (Note 3)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum Zener Impedance",
          "symbol": "ZZT",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 22,
          "max": 22,
          "conditions": "@ IZT = 20 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum Zener Impedance",
          "symbol": "ZZK",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 2000,
          "max": 2000,
          "conditions": "@ IZK = 0.25 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Reverse Leakage Current",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 5,
          "max": 5,
          "conditions": "@ VR = 1 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Forward Voltage",
          "symbol": "VF",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.9,
          "conditions": "@ IF = 10 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Total Power Dissipation on FR-5 Board (Note 1)",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 225,
          "conditions": "@ TA = 25°C; FR-5 board, 1.0 X 0.75 X 0.62 in. (Note 1)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Derating above 25°C, FR-5 Board",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW/°C",
          "min": null,
          "typ": null,
          "max": 1.8,
          "conditions": "derated above TA = 25°C; FR-5 board (Note 1)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Total Power Dissipation on Alumina Substrate (Note 2)",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "@ TA = 25°C; alumina substrate 0.4 X 0.3 X 0.024 in. (Note 2)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Derating above 25°C, Alumina Substrate",
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          "min": null,
          "typ": null,
          "max": 2.4,
          "conditions": "derated above TA = 25°C; alumina substrate (Note 2)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction-to-Ambient (FR-5 Board)",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 556,
          "conditions": "FR-5 board (Note 1)",
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          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction-to-Ambient (Alumina Substrate)",
          "symbol": "RθJA",
          "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 Range",
          "symbol": "TJ, Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_pitch": "LMBZ5229BLT1G (LRC) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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