SM4F48A

{
  "slug": "sm4f48a",
  "version": "0.1.0",
  "type": "component",
  "description": "Yangzhou Yangjie Elec Tech ESD And Surge Protection (TVS/ESD), SOD-123. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "circuit protection",
    "sm4f48a",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sm4f48a.kicad_sym",
    "sm4f48a.kicad_mod",
    "sm4f48a.glb",
    "sm4f48a.step",
    "sm4f48a.lbr",
    "docs/hero.png",
    "docs/sm4f48a-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sm4f48a-hero.glb",
    "sm4f48a-hero.overlay.json",
    "sm4f48a-etched.glb"
  ],
  "component": {
    "mpn": "SM4F48A",
    "manufacturer": "Yangzhou Yangjie Elec Tech",
    "package": "SOD-123",
    "pin_count": 2,
    "category": "Circuit Protection",
    "subcategory": "ESD And Surge Protection (TVS/ESD)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603373344692072448",
    "parts": {
      "symbol": "sm4f48a.kicad_sym",
      "footprint": "sm4f48a.kicad_mod",
      "model_3d": "sm4f48a-hero.glb",
      "model_3d_plain": "sm4f48a-etched.glb",
      "model_3d_step": "sm4f48a-etched.step",
      "model_3d_step_plain": "sm4f48a.step",
      "lbr": "sm4f48a.lbr"
    },
    "distributor_links": {
      "lcsc": "C20603512"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T07:42:17Z",
      "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 terminal, marked by the band on the uni-directional SM4F48A; connect to the protected line, with VRWM 48.0 V and breakdown 53.30 V to 58.90 V at 1 mA."
      },
      {
        "number": "2",
        "name": "A",
        "type": "passive",
        "description": "Anode terminal, the unmarked end of the uni-directional SM4F48A; typically connected to ground, with clamping voltage 77.4 V max at IPP 5.16 A."
      }
    ],
    "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+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 on any drawing. It shows only a two-terminal diode symbol, and t; The package hint was SOD-123, but the datasheet gives the package as SOD-123FL for the whole SM4F se; SM4F48A is listed as uni-directional only (bi-directional marking shown as '/'), so a polarised cath",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 5,
        "cost_usd": 0.1469,
        "at": "2026-10-18T07:40:22"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603373344692072448",
        "pages": 5,
        "sha256": "29379f73d5cbe6ce",
        "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": "sm4f48a.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.5,
          1.6,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "132323445e3d1f9231e81c083cd88a33cd204dd8b96063bb2ed1f3ab4470c7e7",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sm4f48a-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.5,
          1.6,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "663020d671a0b69a0e2665246402d052a2a03c8801bee1920768c1c66889f30f",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}