1N4742ATR

{
  "slug": "1n4742atr",
  "version": "0.1.0",
  "type": "component",
  "description": "onsemi Zener Diodes, DO-41. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "diodes",
    "1n4742atr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "1n4742atr.kicad_sym",
    "1n4742atr.kicad_mod",
    "1n4742atr.glb",
    "1n4742atr.step",
    "1n4742atr.lbr",
    "docs/hero.png",
    "docs/1n4742atr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "1n4742atr-hero.glb",
    "1n4742atr-hero.overlay.json"
  ],
  "component": {
    "mpn": "1N4742ATR",
    "manufacturer": "onsemi",
    "package": "DO-41",
    "pin_count": 2,
    "category": "Diodes",
    "subcategory": "Zener Diodes",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/1n4742atr-d.pdf",
    "parts": {
      "symbol": "1n4742atr.kicad_sym",
      "footprint": "1n4742atr.kicad_mod",
      "model_3d": "1n4742atr-hero.glb",
      "model_3d_step": "1n4742atr.step",
      "lbr": "1n4742atr.lbr",
      "model_3d_plain": "1n4742atr.glb"
    },
    "distributor_links": {
      "lcsc": "C258174"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T19:57:11Z",
      "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 end of the DO-41 glass case marked by the color band; for the 1N4742A 12 V zener (VZ 11.4 to 12.6 V at IZ = 21 mA) this is the terminal that goes positive in reverse breakdown."
      },
      {
        "number": "2",
        "name": "A",
        "type": "passive",
        "description": "Anode, the unbanded end of the DO-41 glass case; the 1N4742A is rated 1.0 W at TL ≤ 50°C with 3/8 inch lead length."
      }
    ],
    "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 prints no pin numbers or pinout table. It only states 'COLOR BAND DENOTES CATHODE' for; The datasheet does not mention the 'TR' suffix in 1N4742ATR (probably tape and reel packing). No ord"
        ],
        "pages_sent": 4,
        "cost_usd": 0.0531,
        "at": "2026-10-22T19:56:34"
      },
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/1n4742atr-d.pdf",
        "pages": 4,
        "sha256": "a21fc849834a1030",
        "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": "1n4742atr.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": 0.0,
        "footprint_binding": "identity",
        "sha256": "c3e23d4b276811b74eecb329bd4480209ad3dbc8cf6e6e3f2a5b542c5ca343c1",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}