BAS21

{
  "schema_version": 1,
  "type": "component",
  "slug": "bas21",
  "title": "BAS21",
  "brief": "Nexperia Diodes - General Purpose, SOT-23. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "diodes",
    "bas21"
  ],
  "component": {
    "mpn": "BAS21",
    "manufacturer": "Nexperia",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Diodes",
    "subcategory": "Diodes - General Purpose",
    "datasheet": "https://assets.nexperia.com/documents/data-sheet/BAS21.pdf",
    "parts": {
      "symbol": "bas21.kicad_sym",
      "footprint": "bas21.kicad_mod",
      "model_3d": "bas21-etched.glb",
      "model_3d_plain": "bas21.glb",
      "model_3d_step": "bas21-etched.step",
      "model_3d_step_plain": "bas21.step",
      "lbr": "bas21.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "A",
        "type": "passive",
        "description": "Anode of the switching diode. Forward current flows from anode (pin 1) to cathode (pin 3); VF ≤ 1 V at IF = 100 mA."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected. No internal bond; leave floating or tie to any convenient net."
      },
      {
        "number": "3",
        "name": "K",
        "type": "passive",
        "description": "Cathode of the switching diode. Reverse voltage rating VR = 200 V (VRRM = 250 V); reverse current ≤ 100 nA at VR = 200 V, Tj = 25 °C."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://assets.nexperia.com/documents/data-sheet/BAS21.pdf",
        "pages": 10,
        "sha256": "4632cdc90d8753d1",
        "source_tier": "mfr"
      },
      "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": "bas21.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": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bas21-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": "38746456652a3c083b71990de33795bbc8ff3cb0aee8f93be58bde9fa8549a74",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Nexperia",
      "Package": "SOT-23",
      "Category": "Diodes",
      "Pins": "3"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "bas21"
  ],
  "discovery_pitch": "BAS21 (Nexperia) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bas21.kicad_sym",
    "bas21.kicad_mod",
    "bas21.glb",
    "bas21.step",
    "bas21.lbr",
    "docs/hero.png",
    "docs/bas21-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T17:30:05.565Z"
}