FMMT634

{
  "schema_version": 1,
  "type": "component",
  "slug": "fmmt634",
  "title": "FMMT634",
  "brief": "YFW Darlington Transistors, SOT-23-3L. 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",
    "transistors-thyristors",
    "fmmt634",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "FMMT634",
    "manufacturer": "YFW",
    "package": "SOT-23-3L",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Darlington Transistors",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603387686019751936",
    "parts": {
      "symbol": "fmmt634.kicad_sym",
      "footprint": "fmmt634.kicad_mod",
      "model_3d": "fmmt634-etched.glb",
      "model_3d_plain": "fmmt634.glb",
      "model_3d_step": "fmmt634-etched.step",
      "model_3d_step_plain": "fmmt634.step",
      "lbr": "fmmt634.lbr"
    },
    "distributor_links": {
      "lcsc": "C25836742"
    },
    "pins": [
      {
        "number": "1",
        "name": "B",
        "type": "input",
        "description": "Base input of NPN Darlington pair; VBE(on) = 1.50 V typ at VCE = 5 V, IC = 1 A; drives collector current up to 900 mA continuous (ICM 5 A peak)."
      },
      {
        "number": "2",
        "name": "E",
        "type": "passive",
        "description": "Emitter; BVEBO = 12 V; emitter cut-off current IEBO ≤ 10 nA at VEB = 7 V."
      },
      {
        "number": "3",
        "name": "C",
        "type": "output",
        "description": "Collector; BVCEO = 100 V, BVCBO = 120 V; IC max 900 mA continuous, ICM 5 A peak; VCE(sat) ≤ 0.96 V at IC = 900 mA, IB = 5 mA."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-sonnet-4-6",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-4-7",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 4,
        "cost_usd": 0.22,
        "at": "2026-09-18T00:45:20"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603387686019751936",
        "pages": 4,
        "sha256": "24a0159b2d5e6073",
        "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": "fmmt634.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": "16964b14f93e6c778288a0c110b35f670fab733109c26f0da7dfc07cc3350040",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "fmmt634-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": "970b382190986c9a4e49b38ed7b57420d7556a179af9e471645cfa7ffbd1d0f0",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "YFW",
      "Package": "SOT-23-3L",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "fmmt634"
  ],
  "discovery_pitch": "FMMT634 (YFW) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "fmmt634.kicad_sym",
    "fmmt634.kicad_mod",
    "fmmt634.glb",
    "fmmt634.step",
    "fmmt634.lbr",
    "docs/hero.png",
    "docs/fmmt634-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T20:44:09.771Z"
}