UT4957G-S08-R-VB

{
  "slug": "ut4957g-s08-r-vb",
  "version": "0.1.0",
  "type": "component",
  "description": "VBsemi Elec MOSFETs, SO-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "triode-mos tube-transistor",
    "ut4957g-s08-r-vb",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
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  "files": [
    "page.json",
    "README.md",
    "ut4957g-s08-r-vb.kicad_sym",
    "ut4957g-s08-r-vb.kicad_mod",
    "ut4957g-s08-r-vb.glb",
    "ut4957g-s08-r-vb.step",
    "ut4957g-s08-r-vb.lbr",
    "docs/hero.png",
    "docs/ut4957g-s08-r-vb-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ut4957g-s08-r-vb-hero.glb",
    "ut4957g-s08-r-vb-hero.overlay.json",
    "ut4957g-s08-r-vb-etched.glb"
  ],
  "component": {
    "mpn": "UT4957G-S08-R-VB",
    "manufacturer": "VBsemi Elec",
    "package": "SO-8",
    "pin_count": 8,
    "category": "Triode/MOS Tube/Transistor",
    "subcategory": "MOSFETs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/7aadda9f4f789723879a1fe485780d7e.pdf",
    "parts": {
      "symbol": "ut4957g-s08-r-vb.kicad_sym",
      "footprint": "ut4957g-s08-r-vb.kicad_mod",
      "model_3d": "ut4957g-s08-r-vb-hero.glb",
      "model_3d_plain": "ut4957g-s08-r-vb-etched.glb",
      "model_3d_step": "ut4957g-s08-r-vb-etched.step",
      "model_3d_step_plain": "ut4957g-s08-r-vb.step",
      "lbr": "ut4957g-s08-r-vb.lbr"
    },
    "distributor_links": {
      "lcsc": "C19711191"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T21:24:44Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "S1",
        "type": "passive",
        "description": "Source terminal of P-channel MOSFET 1; the device is rated VDS = -30 V and VGS = ±20 V."
      },
      {
        "number": "2",
        "name": "G1",
        "type": "input",
        "description": "Gate terminal of P-channel MOSFET 1; VGS is rated ±20 V."
      },
      {
        "number": "3",
        "name": "S2",
        "type": "passive",
        "description": "Source terminal of P-channel MOSFET 2; the device is rated VDS = -30 V and VGS = ±20 V."
      },
      {
        "number": "4",
        "name": "G2",
        "type": "input",
        "description": "Gate terminal of P-channel MOSFET 2; VGS is rated ±20 V."
      },
      {
        "number": "5",
        "name": "D2",
        "type": "passive",
        "description": "Drain terminal of P-channel MOSFET 2, connected internally to pin 6; continuous drain current is rated up to -9.5 A at TC = 25 °C."
      },
      {
        "number": "6",
        "name": "D2",
        "type": "passive",
        "description": "Drain terminal of P-channel MOSFET 2, connected internally to pin 5; continuous drain current is rated up to -9.5 A at TC = 25 °C."
      },
      {
        "number": "7",
        "name": "D1",
        "type": "passive",
        "description": "Drain terminal of P-channel MOSFET 1, connected internally to pin 8; continuous drain current is rated up to -9.5 A at TC = 25 °C."
      },
      {
        "number": "8",
        "name": "D1",
        "type": "passive",
        "description": "Drain terminal of P-channel MOSFET 1, connected internally to pin 7; continuous drain current is rated up to -9.5 A at TC = 25 °C."
      }
    ],
    "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 SO-8 top-view labels in the extracted text are scrambled, so the pin-to-function mapping was inf; Drain pins are listed as connected internally in pairs; the datasheet text does not state this expli; The datasheet has no separate pin table; pin descriptions are built from the absolute maximum rating"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0423,
        "at": "2026-10-28T21:24:30"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/7aadda9f4f789723879a1fe485780d7e.pdf",
        "pages": 9,
        "sha256": "d6d9e1c27cf0591a",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
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    "models_3d": [
      {
        "file": "ut4957g-s08-r-vb.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ut4957g-s08-r-vb-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "696e00f536450df1b6aaf295ec663e21a21b3a02131ba102da1f7dfe6ae45a31",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "SO-8 (SOIC NARROW 8-LEAD, JEDEC MS-012)",
      "source_page": 7,
      "D": {
        "nom_mm": 4.9,
        "range_mm": [
          4.8,
          5.0
        ]
      },
      "E1": {
        "nom_mm": 3.9,
        "range_mm": [
          3.8,
          4.0
        ]
      },
      "E": {
        "nom_mm": 6.0,
        "range_mm": [
          5.8,
          6.2
        ]
      },
      "e": {
        "nom_mm": 1.27,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.55,
        "range_mm": [
          1.35,
          1.75
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "ut4957g-s08-r-vb.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}