SZ1SMB12CAT3G

{
  "slug": "sz1smb12cat3g",
  "version": "0.1.0",
  "type": "component",
  "description": "Littelfuse TVS, SMB. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "circuit protection",
    "sz1smb12cat3g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sz1smb12cat3g.kicad_sym",
    "sz1smb12cat3g.kicad_mod",
    "sz1smb12cat3g.glb",
    "sz1smb12cat3g.step",
    "sz1smb12cat3g.lbr",
    "docs/hero.png",
    "docs/sz1smb12cat3g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sz1smb12cat3g-hero.glb",
    "sz1smb12cat3g-hero.overlay.json",
    "sz1smb12cat3g-etched.glb"
  ],
  "component": {
    "mpn": "SZ1SMB12CAT3G",
    "manufacturer": "Littelfuse",
    "package": "SMB",
    "pin_count": 2,
    "category": "Circuit Protection",
    "subcategory": "TVS",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/2069ce28d7555e2c42a81caea99fe082.pdf",
    "parts": {
      "symbol": "sz1smb12cat3g.kicad_sym",
      "footprint": "sz1smb12cat3g.kicad_mod",
      "model_3d": "sz1smb12cat3g-hero.glb",
      "model_3d_plain": "sz1smb12cat3g-etched.glb",
      "model_3d_step": "sz1smb12cat3g-etched.step",
      "model_3d_step_plain": "sz1smb12cat3g.step",
      "lbr": "sz1smb12cat3g.lbr"
    },
    "distributor_links": {
      "lcsc": "C1977081",
      "digikey": "18-SZ1SMB12CAT3GTR-ND",
      "mouser": "863-SZ1SMB12CAT3G"
    },
    "distributor_check": {
      "checked_at": "2026-10-31T18:43:46Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "18-SZ1SMB12CAT3GTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "863-SZ1SMB12CAT3G",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1",
        "type": "passive",
        "description": "Bi-directional TVS terminal with no polarity (12 V VRWM, 13.3-14.7 V breakdown at 1.0 mA, 19.9 V max clamp at 30.2 A IPP), so it can be connected to either the protected line or return."
      },
      {
        "number": "2",
        "name": "2",
        "type": "passive",
        "description": "Second bi-directional TVS terminal with no polarity (12 V VRWM, 5.0 µA max leakage at VRWM, 600 W peak power at 10/1000 µs), so it can be connected to either the protected line or return."
      }
    ],
    "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 labels pin 1 as Cathode and pin 2 as Anode only in the part-marking drawing, which app"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0863,
        "at": "2026-10-31T18:43:34"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/2069ce28d7555e2c42a81caea99fe082.pdf",
        "pages": 7,
        "sha256": "b867ff8d1ae59140",
        "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": "sz1smb12cat3g.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": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sz1smb12cat3g-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": "5d8833ebb525e845ec743db854e88790169cf0a1675b93ff5def2177228062d2",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "SMB",
      "source_page": 6,
      "D": {
        "nom_mm": 3.56,
        "range_mm": [
          3.3,
          3.95
        ]
      },
      "E1": {
        "nom_mm": 4.32,
        "range_mm": [
          4.06,
          4.6
        ]
      },
      "E": {
        "nom_mm": 5.44,
        "range_mm": [
          5.21,
          5.6
        ]
      },
      "A": {
        "nom_mm": 2.3,
        "range_mm": [
          1.95,
          2.47
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "sz1smb12cat3g.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}