1SMB5940B

{
  "slug": "1smb5940b",
  "version": "0.1.0",
  "type": "component",
  "description": "BORN Zener Diodes, SMB(DO-214AA). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "diodes",
    "1smb5940b",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "1smb5940b.kicad_sym",
    "1smb5940b.kicad_mod",
    "1smb5940b.glb",
    "1smb5940b.step",
    "1smb5940b.lbr",
    "docs/hero.png",
    "docs/1smb5940b-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "1smb5940b-hero.glb",
    "1smb5940b-hero.overlay.json",
    "1smb5940b-etched.glb"
  ],
  "component": {
    "mpn": "1SMB5940B",
    "manufacturer": "BORN",
    "package": "SMB(DO-214AA)",
    "pin_count": 2,
    "category": "Diodes",
    "subcategory": "Zener Diodes",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/06be12228a6968d801e67bfd4df0226d.pdf",
    "parts": {
      "symbol": "1smb5940b.kicad_sym",
      "footprint": "1smb5940b.kicad_mod",
      "model_3d": "1smb5940b-hero.glb",
      "model_3d_plain": "1smb5940b-etched.glb",
      "model_3d_step": "1smb5940b-etched.step",
      "model_3d_step_plain": "1smb5940b.step",
      "lbr": "1smb5940b.lbr"
    },
    "distributor_links": {
      "lcsc": "C22393407"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T06:55:00Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "K",
        "type": "passive",
        "description": "Cathode, marked by the color band on the SMB(DO-214AA) body; for 1SMB5940B the Zener voltage is 40.85 V min to 45.15 V max at IZT = 8.7 mA."
      },
      {
        "number": "2",
        "name": "A",
        "type": "passive",
        "description": "Anode terminal of the Zener diode; the datasheet gives maximum forward voltage of 1.2 V at IF = 200 mA."
      }
    ],
    "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 or pin table for the SMB package. It only says polarity is the ca"
        ],
        "pages_sent": 5,
        "cost_usd": 0.0751,
        "at": "2026-10-22T06:53:57"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/06be12228a6968d801e67bfd4df0226d.pdf",
        "pages": 5,
        "sha256": "d157179bacadcf36",
        "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": "1smb5940b.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": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "029466277d91e9f5492556be93e46611049e07115c7913880c547afa96058ed4",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "1smb5940b-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": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c6d759469376ec994e613038e98aba6b888d58976240df547567a6534b05130d",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}