BAS21C

{
  "slug": "bas21c",
  "version": "0.1.0",
  "type": "component",
  "description": "XZT Switching Diodes, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "diodes",
    "bas21c",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bas21c.kicad_sym",
    "bas21c.kicad_mod",
    "bas21c.glb",
    "bas21c.step",
    "bas21c.lbr",
    "docs/hero.png",
    "docs/bas21c-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bas21c-hero.glb",
    "bas21c-hero.overlay.json"
  ],
  "component": {
    "mpn": "BAS21C",
    "manufacturer": "XZT",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Diodes",
    "subcategory": "Switching Diodes",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603176144845877248",
    "parts": {
      "symbol": "bas21c.kicad_sym",
      "footprint": "bas21c.kicad_mod",
      "model_3d": "bas21c-hero.glb",
      "model_3d_plain": "bas21c.glb",
      "model_3d_step": "bas21c-etched.step",
      "model_3d_step_plain": "bas21c.step",
      "lbr": "bas21c.lbr"
    },
    "distributor_links": {
      "lcsc": "C5805797",
      "mouser": "821-BAS21C"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T21:43:11Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 547 calls left today"
      },
      "mouser": {
        "pn": "821-BAS21C",
        "status": "found",
        "lifecycle": "Not Recommended for New Designs"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A1",
        "type": "passive",
        "description": "Anode of diode 1 in the BAS21C dual common-cathode switching diode (VRRM 250 V, IFM 400 mA)."
      },
      {
        "number": "2",
        "name": "A2",
        "type": "passive",
        "description": "Anode of diode 2 in the BAS21C dual common-cathode switching diode (VRRM 250 V, IFM 400 mA)."
      },
      {
        "number": "3",
        "name": "K",
        "type": "passive",
        "description": "Common cathode of both diodes in the BAS21C (marking JS3), with reverse breakdown voltage min 250 V at IR=100µA."
      }
    ],
    "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 function inferred from the marking diagram for BAS21C (triangles point up toward pin 3, so catho",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 3,
        "cost_usd": 0.1738,
        "at": "2026-10-09T21:40:58"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603176144845877248",
        "pages": 3,
        "sha256": "7f9529620e473acf",
        "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": "bas21c.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3.0,
          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bas21c-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3.0,
          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "e73a765bdbae257547515624cdca1d5ed37599707fc539788512dae43d027742",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}