1SMA4740A SMA

{
  "slug": "1sma4740a-sma",
  "version": "0.1.0",
  "type": "component",
  "description": "XCH(旭昌辉) , SMA. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "ic",
    "1sma4740a sma",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "1sma4740a-sma.kicad_sym",
    "1sma4740a-sma.kicad_mod",
    "1sma4740a-sma.glb",
    "1sma4740a-sma.step",
    "1sma4740a-sma.lbr",
    "docs/hero.png",
    "docs/1sma4740a-sma-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "1sma4740a-sma-hero.glb",
    "1sma4740a-sma-hero.overlay.json",
    "1sma4740a-sma-etched.glb"
  ],
  "component": {
    "mpn": "1SMA4740A SMA",
    "manufacturer": "XCH(旭昌辉)",
    "package": "SMA",
    "pin_count": 2,
    "category": "IC",
    "subcategory": "IC",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603157446084861952",
    "parts": {
      "symbol": "1sma4740a-sma.kicad_sym",
      "footprint": "1sma4740a-sma.kicad_mod",
      "model_3d": "1sma4740a-sma-hero.glb",
      "model_3d_plain": "1sma4740a-sma-etched.glb",
      "model_3d_step": "1sma4740a-sma-etched.step",
      "model_3d_step_plain": "1sma4740a-sma.step",
      "lbr": "1sma4740a-sma.lbr"
    },
    "distributor_links": {
      "lcsc": "C5375230"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T17:21:41Z",
      "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 of the zener diode; operated at positive voltage versus the anode in reverse (zener) regulation, with the 1SMA4740A at 10 V nominal VZ (9.50 V min to 10.5 V max) at IZT = 25 mA, and 1 W maximum total power dissipation."
      },
      {
        "number": "2",
        "name": "A",
        "type": "passive",
        "description": "Anode of the zener diode; forward voltage is max 1.2 V at IF = 200 mA, with junction and storage temperature range of -55 to +150 °C."
      }
    ],
    "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 package drawing (page 3) says '2 leads' but does not print pin numbers or mark the cathode/anode; The 1SMA4740A values (10 V nominal, 9.50 to 10.5 V, 25 mA IZT) come from the row order of the flatte",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 3,
        "cost_usd": 0.0876,
        "at": "2026-10-17T17:18:26"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603157446084861952",
        "pages": 3,
        "sha256": "8898909dec2ee3ad",
        "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": "1sma4740a-sma.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          2.7,
          2.22
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "1cfddd4e3b1bf22b8fc6ee3258c2aade882ed7b85b528e23b9db42437775a1db",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "1sma4740a-sma-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          2.7,
          2.22
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "e6194ca0ded5e0ef1321de9d03872bc3d04a8659e76dcb002c9f4e79131c9f32",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}