main
Ray Set visibility: public e57df97 6h ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "1smb5338b",
  "title": "1SMB5338B",
  "brief": "YFW Zener Diodes, SMB. 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",
    "1smb5338b",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "1SMB5338B",
    "manufacturer": "YFW",
    "package": "SMB",
    "pin_count": 2,
    "category": "Diodes",
    "subcategory": "Zener Diodes",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/2e204f03ef757334c69e4cf912942a36.pdf",
    "parts": {
      "symbol": "1smb5338b.kicad_sym",
      "footprint": "1smb5338b.kicad_mod",
      "model_3d": "1smb5338b-hero.glb",
      "model_3d_plain": "1smb5338b-etched.glb",
      "model_3d_step": "1smb5338b-etched.step",
      "model_3d_step_plain": "1smb5338b.step",
      "lbr": "1smb5338b.lbr"
    },
    "distributor_links": {
      "lcsc": "C5444225"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T21:33:27Z",
      "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 of the zener diode; held positive relative to the anode in zener (reverse) regulation, with 5 W maximum power dissipation at TL = 25 °C."
      },
      {
        "number": "2",
        "name": "Anode",
        "type": "passive",
        "description": "Anode of the zener diode; forward voltage is max 1.2 V at IF = 1.0 A."
      }
    ],
    "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: Pin types for a two-terminal diode are given as passive; datasheet only lists 'Pinning 1.Cathode 2.A"
        ],
        "pages_sent": 3,
        "cost_usd": 0.0441,
        "at": "2026-10-22T21:33:13"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/2e204f03ef757334c69e4cf912942a36.pdf",
        "pages": 3,
        "sha256": "92718fee19745c55",
        "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": "1smb5338b.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.3,
          3.55,
          2.15
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "029466277d91e9f5492556be93e46611049e07115c7913880c547afa96058ed4",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "1smb5338b-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.3,
          3.55,
          2.15
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "ad71c34e96a1c17d1c6de4cc1bcf75fedff2b999e3ab272866cbddfaff54944f",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "YFW",
      "Package": "SMB",
      "Category": "Diodes",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "92718fee19745c551bbb9ddbb3ec39eaa0ece888b32600cebefc4f9c81e7c49c",
      "rows": [
        {
          "name": "Zener voltage tolerance (suffix B)",
          "symbol": "VZ",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "Suffix B indicates ±5% tolerance",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Nominal regulator voltage",
          "symbol": "VZ",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 5.1,
          "max": null,
          "conditions": "@ IZT",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Test current",
          "symbol": "IZT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 240,
          "max": null,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum zener impedance",
          "symbol": "ZZT",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 1.5,
          "conditions": "@ IZT",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum zener impedance (knee)",
          "symbol": "ZZK",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "@ IZK = 1.0 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum reverse leakage current",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "@ VR = 1.0 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum zener current",
          "symbol": "IZM",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 930,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum surge current",
          "symbol": "IZSM",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 14.4,
          "conditions": "Non-recurrent half-sine wave, 8.3 ms",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum voltage regulation",
          "symbol": "ΔVZ",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.39,
          "conditions": "Difference between VZ measured at 10% and 50% of IZT",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum forward voltage",
          "symbol": "VF",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.2,
          "conditions": "IF = 1.0 A",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Power dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "TL = 25 °C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating and storage temperature range",
          "symbol": "TJ, TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "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": null,
          "max": 90,
          "conditions": "Mounted on FR4 PC board (1 oz Cu) with recommended footprint",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to lead",
          "symbol": "RθJL",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "Mounted on FR4 PC board (1 oz Cu) with recommended footprint",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "1smb5338b"
  ],
  "discovery_pitch": "1SMB5338B (YFW) 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",
    "1smb5338b.kicad_sym",
    "1smb5338b.kicad_mod",
    "1smb5338b.glb",
    "1smb5338b.step",
    "1smb5338b.lbr",
    "docs/hero.png",
    "docs/1smb5338b-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "1smb5338b-hero.glb",
    "1smb5338b-hero.overlay.json",
    "1smb5338b-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}