SMMBT3904LT1G

{
  "schema_version": 1,
  "type": "component",
  "slug": "smmbt3904lt1g",
  "title": "SMMBT3904LT1G",
  "brief": "onsemi Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "smmbt3904lt1g",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "SMMBT3904LT1G",
    "manufacturer": "onsemi",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586186881033768960",
    "parts": {
      "symbol": "smmbt3904lt1g.kicad_sym",
      "footprint": "smmbt3904lt1g.kicad_mod",
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      "model_3d_plain": "smmbt3904lt1g.glb",
      "model_3d_step": "smmbt3904lt1g-etched.step",
      "model_3d_step_plain": "smmbt3904lt1g.step",
      "lbr": "smmbt3904lt1g.lbr"
    },
    "distributor_links": {
      "lcsc": "C84555",
      "digikey": "SMMBT3904LT1GOSTR-ND",
      "mouser": "863-SMMBT3904LT1G"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T06:30:39Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "SMMBT3904LT1GOSTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "863-SMMBT3904LT1G",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BASE",
        "type": "input",
        "description": "Base terminal of the NPN transistor; the datasheet gives no separate base current rating, and the related limit is the emitter-base voltage VEBO of 6.0 Vdc maximum."
      },
      {
        "number": "2",
        "name": "EMITTER",
        "type": "passive",
        "description": "Emitter terminal of the NPN transistor; the emitter-base voltage is limited to VEBO 6.0 Vdc and the device is rated for 200 mA continuous collector current."
      },
      {
        "number": "3",
        "name": "COLLECTOR",
        "type": "passive",
        "description": "Collector terminal of the NPN transistor; rated for VCEO 40 Vdc, VCBO 60 Vdc, 200 mA continuous collector current and 900 mA peak collector current (Note 3)."
      }
    ],
    "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's pin assignment is given for SOT-23 (TO-236) Style 6 only: pin 1 BASE, pin 2 EMITTER,; The datasheet gives voltage and current ratings for the device as a whole (maximum ratings table), n"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0087,
        "at": "2026-10-09T06:26:21"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586186881033768960",
        "pages": 7,
        "sha256": "8d63fa245f101a60",
        "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": [
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        "file": "smmbt3904lt1g.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          3,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "smmbt3904lt1g-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "9a3e834cb854539c1edd6c8a0066d7756eed3d586fa05b03af53235d8a0a4516",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "SOT-23",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "smmbt3904lt1g"
  ],
  "discovery_pitch": "SMMBT3904LT1G (onsemi) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
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    "path": "docs/hero.png"
  },
  "files": [
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    "smmbt3904lt1g.lbr",
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    "docs/smmbt3904lt1g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
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  "visibility": {
    "public": true
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}