BSS138

{
  "slug": "bss138",
  "version": "1.1.0",
  "type": "component",
  "description": "Changjing MOSFETs, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "transistors-thyristors",
    "bss138",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bss138.kicad_sym",
    "bss138.kicad_mod",
    "bss138.glb",
    "bss138.step",
    "bss138.lbr",
    "docs/hero.png",
    "docs/bss138-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bss138-hero.glb",
    "bss138-hero.overlay.json"
  ],
  "component": {
    "mpn": "BSS138",
    "manufacturer": "Changjing",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "MOSFETs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586175552680038400",
    "parts": {
      "symbol": "bss138.kicad_sym",
      "footprint": "bss138.kicad_mod",
      "model_3d": "bss138-hero.glb",
      "model_3d_plain": "bss138.glb",
      "model_3d_step": "bss138-etched.step",
      "model_3d_step_plain": "bss138.step",
      "lbr": "bss138.lbr"
    },
    "distributor_links": {
      "lcsc": "C78284",
      "digikey": "BSS138TR-ND",
      "mouser": "512-BSS138"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T17:03:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "BSS138TR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "512-BSS138",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GATE",
        "type": "input",
        "description": "Gate terminal: continuous gate-source voltage VGSS is limited to ±20 V, and gate threshold VGS(th) is 0.80 V min to 1.50 V max at VDS = VGS, ID = 1 mA."
      },
      {
        "number": "2",
        "name": "SOURCE",
        "type": "passive",
        "description": "Source terminal: body diode forward voltage VSD is 1.4 V max at IS = 0.44 A and VGS = 0 V."
      },
      {
        "number": "3",
        "name": "DRAIN",
        "type": "passive",
        "description": "Drain terminal: drain-source voltage VDS is rated 50 V, continuous drain current ID is 0.22 A, and RDS(on) is 3.5 Ω max at VGS = 10 V (6 Ω max at VGS = 4.5 V)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet is for the SOT-23 package only and gives the pin assignment as a text list (1. GATE, 2"
        ],
        "pages_sent": 5,
        "cost_usd": 0.0199,
        "at": "2026-10-08T17:02:45"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586175552680038400",
        "pages": 5,
        "sha256": "0c1c1f76b4802dda",
        "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": "bss138.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": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bss138-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": "05efd0896786eea53a1e55c0edd183f1e75a0cd0b58d8417c769fefaa58511cf",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}