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Ray Set visibility: public 0482f35 4h ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "mmsz5237b-e3-08",
  "title": "MMSZ5237B-E3-08",
  "brief": "Vishay Intertech 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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    "diodes",
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    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MMSZ5237B-E3-08",
    "manufacturer": "Vishay Intertech",
    "package": "SOD-123",
    "pin_count": 2,
    "category": "Diodes",
    "subcategory": "Zener Diodes",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8763476522282176512",
    "parts": {
      "symbol": "mmsz5237b-e3-08.kicad_sym",
      "footprint": "mmsz5237b-e3-08.kicad_mod",
      "model_3d": "mmsz5237b-e3-08-hero.glb",
      "model_3d_plain": "mmsz5237b-e3-08-etched.glb",
      "model_3d_step": "mmsz5237b-e3-08-etched.step",
      "model_3d_step_plain": "mmsz5237b-e3-08.step",
      "lbr": "mmsz5237b-e3-08.lbr"
    },
    "distributor_links": {
      "lcsc": "C6595501"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T15:52:54Z",
      "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, the terminal on the cathode-bar end of the SOD-123 body; it goes positive with respect to the anode in Zener breakdown, and the MMSZ5237 has a nominal VZ of 8.2 V at IZT 20 mA."
      },
      {
        "number": "2",
        "name": "A",
        "type": "passive",
        "description": "Anode, the terminal at the end opposite the cathode bar; the maximum forward voltage is 0.9 V at IF = 10 mA, and power dissipation is limited to 500 mW."
      }
    ],
    "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 package drawing on page 4 shows two terminals and labels the cathode bar. It prints no pin numbe",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 5,
        "cost_usd": 0.145,
        "at": "2026-10-17T15:50:49"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8763476522282176512",
        "pages": 5,
        "sha256": "0db5e8fbd2fd4754",
        "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"
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    "models_3d": [
      {
        "file": "mmsz5237b-e3-08.step",
        "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": "mmsz5237b-e3-08-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": "6fb033c4cbe2234ec84d9ececfb04287b21cfa486edf91deac81becfb6913e02",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Vishay Intertech",
      "Package": "SOD-123",
      "Category": "Diodes",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "0db5e8fbd2fd47549d13bf8c615e9099cba8d45e5f9d4916cc87abdd303a6d78",
      "rows": [
        {
          "name": "Zener voltage tolerance (B suffix, MMSZ5237B)",
          "symbol": "VZ",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "Standard tolerance with 'B' suffix (MMSZ5237B); 'C' suffix is ±2 %",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Reverse leakage current",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 3,
          "conditions": "VR = 6.5 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Dynamic resistance (Zener impedance)",
          "symbol": "ZZ",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 8,
          "conditions": "IZT1 = 20 mA, 1 kHz AC at 10 % of IZT",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Dynamic resistance at knee (Zener impedance)",
          "symbol": "ZZK",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "IZT2 = 0.25 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Forward voltage",
          "symbol": "VF",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.9,
          "conditions": "IF = 10 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power dissipation",
          "symbol": "Ptot",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "TL = 75 °C, on FR-4 or FR-5 board with minimum recommended solder pad layout",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature range",
          "symbol": "Top",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature",
          "symbol": "Tj",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction to ambient air",
          "symbol": "RthJA",
          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": null,
          "max": 340,
          "conditions": "On FR-4 or FR-5 board with minimum recommended solder pad layout",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Nominal Zener voltage",
          "symbol": "VZ",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 8.2,
          "max": null,
          "conditions": "Test current IZT1 = 20 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Temperature coefficient of Zener voltage",
          "symbol": "VZ",
          "kind": "temperature_coefficient",
          "unit": "%/°C",
          "min": null,
          "typ": 0.062,
          "max": null,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "MMSZ5237B-E3-08 (Vishay Intertech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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