MMBD4148A

{
  "schema_version": 1,
  "type": "component",
  "slug": "mmbd4148a",
  "title": "MMBD4148A",
  "brief": "Changjing Switching Diodes, SOT-23. 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",
    "diodes",
    "mmbd4148a",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MMBD4148A",
    "manufacturer": "Changjing",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Diodes",
    "subcategory": "Switching Diodes",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586171691714154496",
    "parts": {
      "symbol": "mmbd4148a.kicad_sym",
      "footprint": "mmbd4148a.kicad_mod",
      "model_3d": "mmbd4148a-hero.glb",
      "model_3d_plain": "mmbd4148a.glb",
      "model_3d_step": "mmbd4148a-etched.step",
      "model_3d_step_plain": "mmbd4148a.step",
      "lbr": "mmbd4148a.lbr"
    },
    "distributor_links": {
      "lcsc": "C8593"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T08:26:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A",
        "type": "passive",
        "description": "Anode of the single switching diode (VRRM 100 V, forward continuous current 300 mA)."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection shown in the MMBD4148A single-diode package drawing."
      },
      {
        "number": "3",
        "name": "K",
        "type": "passive",
        "description": "Cathode of the single switching diode (DC blocking voltage 100 V)."
      }
    ],
    "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: Pin 1 as anode and pin 3 as cathode are read from the small internal schematic. The diode symbol ori",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 2,
        "cost_usd": 0.1025,
        "at": "2026-10-09T08:23:40"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586171691714154496",
        "pages": 2,
        "sha256": "740611ff10445e4a",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "mmbd4148a.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mmbd4148a-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "2883b5331ea48ef1c8cf6abb525eacfe6c318a80168412c8d356e486f16dd3d2",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Changjing",
      "Package": "SOT-23",
      "Category": "Diodes",
      "Pins": "3"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "mmbd4148a"
  ],
  "discovery_pitch": "MMBD4148A (Changjing) 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",
    "mmbd4148a.kicad_sym",
    "mmbd4148a.kicad_mod",
    "mmbd4148a.glb",
    "mmbd4148a.step",
    "mmbd4148a.lbr",
    "docs/hero.png",
    "docs/mmbd4148a-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mmbd4148a-hero.glb",
    "mmbd4148a-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}