FMMT491TC

{
  "slug": "fmmt491tc",
  "version": "0.1.0",
  "type": "component",
  "description": "Diodes Incorporated Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "transistors-thyristors",
    "fmmt491tc",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "fmmt491tc.kicad_sym",
    "fmmt491tc.kicad_mod",
    "fmmt491tc.glb",
    "fmmt491tc.step",
    "fmmt491tc.lbr",
    "docs/hero.png",
    "docs/fmmt491tc-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "fmmt491tc-hero.glb",
    "fmmt491tc-hero.overlay.json"
  ],
  "component": {
    "mpn": "FMMT491TC",
    "manufacturer": "Diodes Incorporated",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588906217477443584",
    "parts": {
      "symbol": "fmmt491tc.kicad_sym",
      "footprint": "fmmt491tc.kicad_mod",
      "model_3d": "fmmt491tc-hero.glb",
      "model_3d_plain": "fmmt491tc.glb",
      "model_3d_step": "fmmt491tc-etched.step",
      "model_3d_step_plain": "fmmt491tc.step",
      "lbr": "fmmt491tc.lbr"
    },
    "distributor_links": {
      "lcsc": "C508218",
      "digikey": "31-FMMT491TCTR-ND",
      "mouser": "522-FMMT491TC"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T09:53:26Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "31-FMMT491TCTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "522-FMMT491TC",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "B",
        "type": "input",
        "description": "Base of the NPN transistor; the base current rating is IB 200 mA, with VEBO 7 V maximum."
      },
      {
        "number": "2",
        "name": "E",
        "type": "passive",
        "description": "Emitter of the NPN transistor; the emitter-base voltage rating is VEBO 7 V maximum."
      },
      {
        "number": "3",
        "name": "C",
        "type": "passive",
        "description": "Collector of the NPN transistor; ratings are VCEO 60 V, VCBO 80 V, IC 1 A continuous and ICM 2 A peak."
      }
    ],
    "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: The datasheet labels the SOT23 top-view pin-out only with C, E and B and prints no pin numbers. The ; Pin types are inferred. KiCad has no BJT-specific type, so E and C are passive and B is input.",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 7,
        "cost_usd": 0.1377,
        "at": "2026-10-09T09:51:10"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588906217477443584",
        "pages": 7,
        "sha256": "c149432cdb96aa55",
        "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": "fmmt491tc.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": "fmmt491tc-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          3.0,
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        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "69693272fd625852b7d599c401cb7627161f2a9e761d3536fd543bd26309f093",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}