MMSZ5240C

{
  "schema_version": 1,
  "type": "component",
  "slug": "mmsz5240c",
  "title": "MMSZ5240C",
  "brief": "Changjing 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": [
    "component",
    "diodes",
    "mmsz5240c",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MMSZ5240C",
    "manufacturer": "Changjing",
    "package": "SOD-123",
    "pin_count": 2,
    "category": "Diodes",
    "subcategory": "Zener Diodes",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590920556952690688",
    "parts": {
      "symbol": "mmsz5240c.kicad_sym",
      "footprint": "mmsz5240c.kicad_mod",
      "model_3d": "mmsz5240c-hero.glb",
      "model_3d_plain": "mmsz5240c-etched.glb",
      "model_3d_step": "mmsz5240c-etched.step",
      "model_3d_step_plain": "mmsz5240c.step",
      "lbr": "mmsz5240c.lbr"
    },
    "distributor_links": {
      "lcsc": "C5293063"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T15:52:17Z",
      "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 '-' with the band on the body); the Zener breakdown voltage VZ is 10 V nominal (9.80 to 10.20 V) at IZT = 20 mA, and it conducts reverse current at VZ."
      },
      {
        "number": "2",
        "name": "A",
        "type": "passive",
        "description": "Anode (marked '+' on the package drawing); 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 datasheet marks polarity only with '+' (anode) and '-' (cathode, banded end). It prints no pin n",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 5,
        "cost_usd": 0.2575,
        "at": "2026-10-17T15:50:20"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590920556952690688",
        "pages": 5,
        "sha256": "d0ee804c65052055",
        "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": "mmsz5240c.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": "mmsz5240c-etched.step",
        "role": "eda",
        "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": "edc26c3fe5cf20acacc38e6a8619cadd8953293f8ad551f86386cd2eb81cfcde",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Changjing",
      "Package": "SOD-123",
      "Category": "Diodes",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "d0ee804c650520552c305f4fbcba58578bf6dd70c983a890b75f4571d69a6bc5",
      "rows": [
        {
          "name": "Zener voltage (nominal 10 V, MMSZ5240C, code 2F5)",
          "symbol": "VZ",
          "kind": "electrical",
          "unit": "V",
          "min": 9.8,
          "typ": 10,
          "max": 10.2,
          "conditions": "IZT = 20 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum Zener impedance",
          "symbol": "ZZT",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 17,
          "conditions": "IZT = 20 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum Zener impedance",
          "symbol": "ZZK",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 600,
          "conditions": "IZK = 0.25 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum reverse current",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 3,
          "conditions": "VR = 8.0 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Forward voltage",
          "symbol": "VF",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.9,
          "conditions": "IF = 10 mA; tested with pulses, Tp≤1.0 ms (Note 2)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Power dissipation",
          "symbol": "Pd",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "Mounted on 1 in² FR-4 board, 2 oz copper, still air, Ta=25 ℃ (Note 1)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operation junction and storage temperature range",
          "symbol": "TJ,Tstg",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction to ambient air",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": null,
          "max": 250,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "mmsz5240c"
  ],
  "discovery_pitch": "MMSZ5240C (Changjing) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mmsz5240c.kicad_sym",
    "mmsz5240c.kicad_mod",
    "mmsz5240c.glb",
    "mmsz5240c.step",
    "mmsz5240c.lbr",
    "docs/hero.png",
    "docs/mmsz5240c-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mmsz5240c-hero.glb",
    "mmsz5240c-hero.overlay.json",
    "mmsz5240c-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}