main
Ray Set visibility: public 3a2ba31 3d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "zmm5243b",
  "title": "ZMM5243B",
  "brief": "JSMSEMI Zener Diodes, MiniMELF. 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",
    "zmm5243b",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ZMM5243B",
    "manufacturer": "JSMSEMI",
    "package": "MiniMELF",
    "pin_count": 2,
    "category": "Diodes",
    "subcategory": "Zener Diodes",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/8a4684282f2237011eadb9c0c4bbba9f.pdf",
    "parts": {
      "symbol": "zmm5243b.kicad_sym",
      "footprint": "zmm5243b.kicad_mod",
      "model_3d": "zmm5243b-hero.glb",
      "model_3d_step": "zmm5243b.step",
      "lbr": "zmm5243b.lbr",
      "model_3d_plain": "zmm5243b.glb"
    },
    "distributor_links": {
      "lcsc": "C2857215"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T19:04:23Z",
      "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 terminal, marked by the color band on the glass MINI-MELF case; the zener voltage (VZ 13 V nominal at IZT 9.5 mA for ZMM5243B) is developed with this end positive."
      },
      {
        "number": "2",
        "name": "A",
        "type": "passive",
        "description": "Anode terminal at the end opposite the color band of the glass MINI-MELF case."
      }
    ],
    "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 gives no pin numbers for the MINI-MELF two-terminal diode. It says only that the color; Anode and cathode are not named explicitly in the pin table. The anode is inferred as the terminal o"
        ],
        "pages_sent": 3,
        "cost_usd": 0.0358,
        "at": "2026-10-22T19:04:12"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/8a4684282f2237011eadb9c0c4bbba9f.pdf",
        "pages": 3,
        "sha256": "667ec1445134e305",
        "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": "zmm5243b.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": "JSMSEMI",
      "Package": "MiniMELF",
      "Category": "Diodes",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "667ec1445134e305f707a1f3bc48fc5760ecce55ead53b4edacb169a287daff0",
      "rows": [
        {
          "name": "Nominal zener voltage",
          "symbol": "VZ",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 13,
          "max": null,
          "conditions": "@ IZT = 9.5 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Zener voltage tolerance",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "\"B\" suffix",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Test current",
          "symbol": "IZT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 9.5,
          "max": null,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum zener impedance",
          "symbol": "ZZT",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 13,
          "conditions": "@ IZT",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum zener impedance (knee)",
          "symbol": "ZZK",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 600,
          "conditions": "@ IZK",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Typical temperature coefficient",
          "symbol": "αVZ",
          "kind": "temperature_coefficient",
          "unit": "%/°C",
          "min": null,
          "typ": 0.079,
          "max": null,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum reverse leakage current",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "@ VR = 9.9 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum DC zener current",
          "symbol": "IZM",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 35,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power dissipation",
          "symbol": "Ptot",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "Tamb=75°C (Note 1)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction to ambient",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "Note 1",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "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": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 175,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "zmm5243b"
  ],
  "discovery_pitch": "ZMM5243B (JSMSEMI) 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",
    "zmm5243b.kicad_sym",
    "zmm5243b.kicad_mod",
    "zmm5243b.glb",
    "zmm5243b.step",
    "zmm5243b.lbr",
    "docs/hero.png",
    "docs/zmm5243b-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "zmm5243b-hero.glb",
    "zmm5243b-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}