MM1Z51

{
  "schema_version": 1,
  "type": "component",
  "slug": "mm1z51",
  "title": "MM1Z51",
  "brief": "Shandong Jingdao Microelectronics Zener Diodes, SOD-123. 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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  "component": {
    "mpn": "MM1Z51",
    "manufacturer": "Shandong Jingdao Microelectronics",
    "package": "SOD-123",
    "pin_count": 2,
    "category": "Diodes",
    "subcategory": "Zener Diodes",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588880619904913408",
    "parts": {
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      "footprint": "mm1z51.kicad_mod",
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      "model_3d_step": "mm1z51-etched.step",
      "model_3d_step_plain": "mm1z51.step",
      "lbr": "mm1z51.lbr"
    },
    "distributor_links": {
      "lcsc": "C169491"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T16:11:23Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Cathode",
        "type": "passive",
        "description": "Cathode terminal of the zener diode, listed as PIN 1 'Cathode' in the datasheet pinning table; the datasheet gives no additional pin-specific limits."
      },
      {
        "number": "2",
        "name": "Anode",
        "type": "passive",
        "description": "Anode terminal of the zener diode, listed as PIN 2 'Anode' in the datasheet pinning table; the datasheet gives no additional pin-specific limits."
      }
    ],
    "provenance": {
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      "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 datasheet is a family datasheet (MM1Z2V0 THRU MM1Z75). MM1Z51 appears in the Page 2 characterist; Pin types are set to 'passive' (KiCad class for diode terminals) because the datasheet does not spec"
        ],
        "pages_sent": 3,
        "cost_usd": 0.0248,
        "at": "2026-10-17T16:09:43"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588880619904913408",
        "pages": 3,
        "sha256": "8602e76c9086db90",
        "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": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.5,
          1.6,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "132323445e3d1f9231e81c083cd88a33cd204dd8b96063bb2ed1f3ab4470c7e7",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mm1z51-etched.step",
        "role": "eda",
        "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",
        "sha256": "f27ca3370a4bb18c972c56ba3ca1ffe46efa7fc348cc3f99945df8758c3ae9a7",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Shandong Jingdao Microelectronics",
      "Package": "SOD-123",
      "Category": "Diodes",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "8602e76c9086db901040dd326fc2c8582879db32f6ba52df06fbcf8cb4d2667f",
      "rows": [
        {
          "name": "Zener voltage (VZT) minimum",
          "symbol": "VZT",
          "kind": "electrical",
          "unit": "V",
          "min": 48,
          "typ": null,
          "max": null,
          "conditions": "VZT tested with pulses (20 ms)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Zener voltage (VZT) maximum",
          "symbol": "VZT",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 54,
          "conditions": "VZT tested with pulses (20 ms)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Zener voltage tolerance",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "Tolerance approximately ±5%",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Total power dissipation",
          "symbol": "Ptot",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "Ta = 25 °C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating and storage temperature range",
          "symbol": "Tj, Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to ambient",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 340,
          "max": null,
          "conditions": "Junction to ambient, PCB mounted with 2.0\" X 2.0\" (54 X 5 cm) copper area pads",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "mm1z51"
  ],
  "discovery_pitch": "MM1Z51 (Shandong Jingdao Microelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
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}