ZMM5248B

{
  "schema_version": 1,
  "type": "component",
  "slug": "zmm5248b",
  "title": "ZMM5248B",
  "brief": "LGE Zener Diodes, LL-34. 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": "ZMM5248B",
    "manufacturer": "LGE",
    "package": "LL-34",
    "pin_count": 2,
    "category": "Diodes",
    "subcategory": "Zener Diodes",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/bb9e9a87f5c960ec0bc99b837dd23aea.pdf",
    "parts": {
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    },
    "distributor_links": {
      "lcsc": "C48578703"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T22:02:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "K",
        "type": "passive",
        "description": "Cathode, marked by the color band at the end of the LL-34 glass case; the Zener (VZ) is 17.1V min to 18.9V max at IZT=7.0mA for the ZMM5248B (18V nominal)."
      },
      {
        "number": "2",
        "name": "A",
        "type": "passive",
        "description": "Anode, the end opposite the color band; the datasheet gives a 500mW power dissipation limit and a junction temperature of 175 °C."
      }
    ],
    "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",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet has no pin numbers. It only says the color band marks the cathode end. The numbering 1; The mechanical drawing (MINI-MELF dimensions) did not come through in the extracted text, so no dime"
        ],
        "pages_sent": 3,
        "cost_usd": 0.045,
        "at": "2026-10-22T22:02:02"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/bb9e9a87f5c960ec0bc99b837dd23aea.pdf",
        "pages": 3,
        "sha256": "a273cd0042ff9dec",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 2,
        "described": 2,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "zmm5248b.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.6,
          1.4,
          1.4
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "bab3a3356a14efb0438caca9adf53472dea34425715606e933f092f87f73f650",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "LGE",
      "Package": "LL-34",
      "Category": "Diodes",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "a273cd0042ff9dec3fa0daddb5e13adfe66f892523e408557d074485e5536c86",
      "rows": [
        {
          "name": "Zener Voltage",
          "symbol": "VZ",
          "kind": "electrical",
          "unit": "V",
          "min": 17.1,
          "typ": 18,
          "max": 18.9,
          "conditions": "IZ=7.0mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Zener Voltage Tolerance",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "Suffix B",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Max Zener Impedance",
          "symbol": "ZZT",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 21,
          "conditions": "IZT=7.0mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Max Zener Knee Impedance",
          "symbol": "ZZK",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 600,
          "conditions": "IZK=0.25mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reverse Leakage Current",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "VR=14.0V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Forward Voltage",
          "symbol": "VF",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.1,
          "conditions": "IF=200mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation",
          "symbol": "Pd",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature",
          "symbol": "Tj",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 175,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "Ts",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 175,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "readme",
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  "discovery_triggers": [
    "zmm5248b"
  ],
  "discovery_pitch": "ZMM5248B (LGE) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "path": "docs/hero.png"
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  "visibility": {
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}