WST4040

{
  "schema_version": 1,
  "type": "component",
  "slug": "wst4040",
  "title": "WST4040",
  "brief": "Winsok Semicon MOSFETs, 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",
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    "transistors-thyristors",
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    "extractor-text"
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  "component": {
    "mpn": "WST4040",
    "manufacturer": "Winsok Semicon",
    "package": "SOT-23-3L",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "MOSFETs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884095736139776",
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    "distributor_links": {
      "lcsc": "C377863"
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      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
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      "mouser": {
        "pn": null,
        "status": "no match"
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    "pins": [
      {
        "number": "1",
        "name": "G",
        "type": "input",
        "description": "Gate; gate-source voltage limited to ±20 V, threshold 0.6 to 1.6 V (1.0 V typ) at 250 µA."
      },
      {
        "number": "2",
        "name": "S",
        "type": "passive",
        "description": "Source; continuous source current up to 1 A through the body diode, pulsed 16 A."
      },
      {
        "number": "3",
        "name": "D",
        "type": "passive",
        "description": "Drain; drain-source voltage rated 40 V, continuous drain current 5.8 A and pulsed 16 A."
      }
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        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The pin configuration drawing labels only D, G and S and prints no pin numbers. The numbers 1=G, 2=S",
          "vision extraction: provenance cannot be text-verified; needs consensus"
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        "cost_usd": 0.2101,
        "at": "2026-10-09T10:49:56"
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        "sha256": "740fd14bc154952e",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
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    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "role": "plain",
        "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": "16964b14f93e6c778288a0c110b35f670fab733109c26f0da7dfc07cc3350040",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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      {
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Winsok Semicon",
      "Package": "SOT-23-3L",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "740fd14bc154952e",
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          "name": "Drain-Source Voltage",
          "symbol": "VDS",
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          "unit": "V",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "",
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        },
        {
          "name": "Gate-Source Voltage",
          "symbol": "VGS",
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          "unit": "V",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "",
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        },
        {
          "name": "Continuous Drain Current, TC=25℃",
          "symbol": "ID",
          "kind": "absolute_maximum",
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        },
        {
          "name": "Continuous Drain Current, TC=70℃",
          "symbol": "ID",
          "kind": "absolute_maximum",
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          "typ": null,
          "max": 2.5,
          "conditions": "VGS @ 4.5V",
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          "source": "datasheet"
        },
        {
          "name": "Pulsed Drain Current",
          "symbol": "IDM",
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          "unit": "A",
          "min": null,
          "typ": null,
          "max": 16,
          "conditions": "",
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        },
        {
          "name": "Total Power Dissipation, TA=25℃",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1,
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        },
        {
          "name": "Storage Temperature Range",
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          "unit": "℃",
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          "typ": null,
          "max": 150,
          "conditions": "",
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        },
        {
          "name": "Operating Junction Temperature Range",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
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          "conditions": "",
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        },
        {
          "name": "Thermal Resistance Junction-ambient",
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          "kind": "thermal",
          "unit": "℃/W",
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          "max": 125,
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        },
        {
          "name": "Thermal Resistance Junction-Case",
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          "unit": "℃/W",
          "min": null,
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        },
        {
          "name": "Single Pulse Avalanche Energy",
          "symbol": "EAS",
          "kind": "electrical",
          "unit": "mJ",
          "min": 9,
          "typ": null,
          "max": null,
          "conditions": "VDD=25V, L=0.1mH, IAS=2A",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Continuous Source Current",
          "symbol": "IS",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VG=VD=0V, Force Current",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Pulsed Source Current",
          "symbol": "ISM",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 16,
          "conditions": "",
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        },
        {
          "name": "Diode Forward Voltage",
          "symbol": "VSD",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.2,
          "conditions": "VGS=0V, IS=1A, TJ=25℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Drain-Source Breakdown Voltage",
          "symbol": "BVDSS",
          "kind": "electrical",
          "unit": "V",
          "min": 40,
          "typ": null,
          "max": null,
          "conditions": "VGS=0V, ID=250uA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Static Drain-Source On-Resistance",
          "symbol": "RDS(ON)",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 35,
          "max": 50,
          "conditions": "VGS=10V, ID=3A",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Gate Threshold Voltage",
          "symbol": "VGS(th)",
          "kind": "electrical",
          "unit": "V",
          "min": 0.6,
          "typ": 1,
          "max": 1.6,
          "conditions": "VGS=VDS, ID=250uA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Drain-Source Leakage Current, TJ=25℃",
          "symbol": "IDSS",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VDS=32V, VGS=0V, TJ=25℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Drain-Source Leakage Current, TJ=55℃",
          "symbol": "IDSS",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "VDS=32V, VGS=0V, TJ=55℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Gate-Source Leakage Current",
          "symbol": "IGSS",
          "kind": "electrical",
          "unit": "nA",
          "min": -100,
          "typ": null,
          "max": 100,
          "conditions": "VGS=±20V, VDS=0V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Gate-Source Charge",
          "symbol": "Qgs",
          "kind": "electrical",
          "unit": "nC",
          "min": null,
          "typ": 0.8,
          "max": 3.5,
          "conditions": "VDS=20V, VGS=4.5V, ID=2A",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Gate-Drain Charge",
          "symbol": "Qgd",
          "kind": "electrical",
          "unit": "nC",
          "min": null,
          "typ": 1.65,
          "max": 4.2,
          "conditions": "VDS=20V, VGS=4.5V, ID=2A",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Turn-On Delay Time",
          "symbol": "Td(on)",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 1.5,
          "max": 4.8,
          "conditions": "VDD=20V, VGS=10V, RG=3.3Ω, ID=1A",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Turn-Off Delay Time",
          "symbol": "Td(off)",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 18,
          "max": 44,
          "conditions": "VDD=20V, VGS=10V, RG=3.3Ω, ID=1A",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Fall Time",
          "symbol": "Tf",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 5.9,
          "max": 8,
          "conditions": "VDD=20V, VGS=10V, RG=3.3Ω, ID=1A",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
    "wst4040"
  ],
  "discovery_pitch": "WST4040 (Winsok Semicon) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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