SMAJ78A

{
  "schema_version": 1,
  "type": "component",
  "slug": "smaj78a",
  "title": "SMAJ78A",
  "brief": "DOWO TVS, SMA(DO-214AC). 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",
    "circuit protection",
    "smaj78a",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "SMAJ78A",
    "manufacturer": "DOWO",
    "package": "SMA(DO-214AC)",
    "pin_count": 2,
    "category": "Circuit Protection",
    "subcategory": "TVS",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/dce0b18336f94a8d8b692d8ae296d93a.pdf",
    "parts": {
      "symbol": "smaj78a.kicad_sym",
      "footprint": "smaj78a.kicad_mod",
      "model_3d": "smaj78a-hero.glb",
      "model_3d_plain": "smaj78a-etched.glb",
      "model_3d_step": "smaj78a-etched.step",
      "model_3d_step_plain": "smaj78a.step",
      "lbr": "smaj78a.lbr"
    },
    "distributor_links": {
      "lcsc": "C22380739"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T12:57:40Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "K (cathode)",
        "type": "passive",
        "description": "The color band marks the cathode end on this unidirectional SMAJ78A, rated for a working peak reverse voltage VRWM of 78.0 V with a maximum reverse leakage IR of 1 uA at VRWM."
      },
      {
        "number": "2",
        "name": "A (anode)",
        "type": "passive",
        "description": "The end opposite the color band is the anode; the device is rated for 400 W peak pulse power (10/1000 us waveform) and clamps to a maximum of 126.0 V at a peak pulse current IPP of 3.17 A."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet prints no pin numbers for this two-terminal diode. Numbers 1 (cathode) and 2 (anode) a; The datasheet covers one package only (SMA / DO-214AC, dimensions on page 1), so the package variant",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 4,
        "cost_usd": 0.1552,
        "at": "2026-10-21T12:52:10"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/dce0b18336f94a8d8b692d8ae296d93a.pdf",
        "pages": 4,
        "sha256": "4198cd8e3dc5e7ef",
        "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": "smaj78a.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5,
          2.7,
          2.22
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "1cfddd4e3b1bf22b8fc6ee3258c2aade882ed7b85b528e23b9db42437775a1db",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "smaj78a-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5,
          2.7,
          2.22
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "775e41b2613b815ccaad9e298d73df2e276688032f306c04ef53af1327d306e6",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "DOWO",
      "Package": "SMA(DO-214AC)",
      "Category": "Circuit Protection",
      "Pins": "2"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "smaj78a"
  ],
  "discovery_pitch": "SMAJ78A (DOWO) 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",
    "smaj78a.kicad_sym",
    "smaj78a.kicad_mod",
    "smaj78a.glb",
    "smaj78a.step",
    "smaj78a.lbr",
    "docs/hero.png",
    "docs/smaj78a-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "smaj78a-hero.glb",
    "smaj78a-hero.overlay.json",
    "smaj78a-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}