main
Ray Set visibility: public ec023b9 11h ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "1n4746a-tr",
  "title": "1N4746A-TR",
  "brief": "Vishay Intertech Zener Diodes, DO-41. 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",
    "1n4746a-tr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "1N4746A-TR",
    "manufacturer": "Vishay Intertech",
    "package": "DO-41",
    "pin_count": 2,
    "category": "Diodes",
    "subcategory": "Zener Diodes",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/297b7de44d66dfcc8352ea72534e95f2.pdf",
    "parts": {
      "symbol": "1n4746a-tr.kicad_sym",
      "footprint": "1n4746a-tr.kicad_mod",
      "model_3d": "1n4746a-tr-hero.glb",
      "model_3d_step": "1n4746a-tr.step",
      "lbr": "1n4746a-tr.lbr",
      "model_3d_plain": "1n4746a-tr.glb"
    },
    "distributor_links": {
      "lcsc": "C917497"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T19:13:25Z",
      "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 lead at the end marked by the cathode identification band; for the 1N4746A it is held positive to the anode to regulate at VZ nominal 18 V at IZT 14 mA."
      },
      {
        "number": "2",
        "name": "A",
        "type": "passive",
        "description": "Anode, the lead opposite the cathode band; forward voltage is max 1.2 V at IF = 200 mA and total power dissipation is limited to 1300 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",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet draws the DO-41 axial package with only a 'Cathode Identification' band and does not p; The datasheet covers the whole 1N4728A to 1N4761A series, and the ordering code is given as '-series"
        ],
        "pages_sent": 4,
        "cost_usd": 0.0524,
        "at": "2026-10-22T19:13:17"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/297b7de44d66dfcc8352ea72534e95f2.pdf",
        "pages": 4,
        "sha256": "33369d6dd0299505",
        "source_tier": "mfr"
      },
      "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": "1n4746a-tr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          10.96,
          2.72,
          5.71
        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "c3e23d4b276811b74eecb329bd4480209ad3dbc8cf6e6e3f2a5b542c5ca343c1",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Vishay Intertech",
      "Package": "DO-41",
      "Category": "Diodes",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "33369d6dd029950575c67d35bdc670118c9699955a372927720be2045a5973ce",
      "rows": [
        {
          "name": "Zener voltage tolerance",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "Standard Zener voltage tolerance",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Power dissipation",
          "symbol": "Ptot",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 1300,
          "conditions": "Leads at 4 mm from case kept at ambient temperature",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction to ambient",
          "symbol": "RthJA",
          "kind": "thermal",
          "unit": "K/W",
          "min": null,
          "typ": null,
          "max": 110,
          "conditions": "Leads at 4 mm from case kept at ambient temperature",
          "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": -65,
          "typ": null,
          "max": 175,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Forward voltage",
          "symbol": "VF",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.2,
          "conditions": "IF = 200 mA",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Reverse leakage current",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "VR = 13.7 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Dynamic resistance",
          "symbol": "ZZT",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "at IZT1, f = 1 kHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Dynamic resistance (knee)",
          "symbol": "ZZK",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 750,
          "conditions": "at IZT2 = 0.25 mA, f = 1 kHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Surge current",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 250,
          "conditions": "tp = 10 ms",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Regulator current",
          "symbol": "IZM",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "Electrodes at 4 mm from case kept at ambient temperature",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Zener voltage nominal",
          "symbol": "VZ",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 18,
          "max": null,
          "conditions": "at IZT1 = 14 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Test current",
          "symbol": "IZT1",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 14,
          "max": null,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Test current (knee)",
          "symbol": "IZT2",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.25,
          "max": null,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "1n4746a-tr"
  ],
  "discovery_pitch": "1N4746A-TR (Vishay Intertech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "1n4746a-tr.step",
    "1n4746a-tr.lbr",
    "docs/hero.png",
    "docs/1n4746a-tr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "1n4746a-tr-hero.glb",
    "1n4746a-tr-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}