WSD4078DN56

{
  "schema_version": 1,
  "type": "component",
  "slug": "wsd4078dn56",
  "title": "WSD4078DN56",
  "brief": "Winsok Semicon MOSFETs, DFN-8(5x6). 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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  "component": {
    "mpn": "WSD4078DN56",
    "manufacturer": "Winsok Semicon",
    "package": "DFN-8(5x6)",
    "pin_count": 9,
    "category": "Transistors/Thyristors",
    "subcategory": "MOSFETs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/86e3c6054c2f978361bc1c425c9cde24.pdf",
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      "lbr": "wsd4078dn56.lbr"
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    "distributor_links": {
      "lcsc": "C5444513"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T12:22:18Z",
      "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 of MOSFET 1 (N-channel, VDS 40 V, ID 40 A)."
      },
      {
        "number": "2",
        "name": "G1",
        "type": "input",
        "description": "Gate of MOSFET 1 (VGS ±20 V max, threshold 1.2 to 2.5 V)."
      },
      {
        "number": "3",
        "name": "S2",
        "type": "passive",
        "description": "Source of MOSFET 2 (N-channel, VDS 40 V, ID 40 A)."
      },
      {
        "number": "4",
        "name": "G2",
        "type": "input",
        "description": "Gate of MOSFET 2 (VGS ±20 V max, threshold 1.2 to 2.5 V)."
      },
      {
        "number": "5",
        "name": "D2",
        "type": "passive",
        "description": "Drain of MOSFET 2 (VDS 40 V, RDS(ON) 7.0 mΩ typ at VGS=10 V)."
      },
      {
        "number": "6",
        "name": "D2",
        "type": "passive",
        "description": "Drain of MOSFET 2, tied to the other D2 pin (VDS 40 V)."
      },
      {
        "number": "7",
        "name": "D1",
        "type": "passive",
        "description": "Drain of MOSFET 1 (VDS 40 V, RDS(ON) 7.0 mΩ typ at VGS=10 V)."
      },
      {
        "number": "8",
        "name": "D1",
        "type": "passive",
        "description": "Drain of MOSFET 1, tied to the other D1 pin (VDS 40 V)."
      },
      {
        "number": "9",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
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    "provenance": {
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The pin drawing on page 1 gives only pin names (S1, G1, S2, G2 on one side; D1, D1, D2, D2 on the ot",
          "vision extraction: provenance cannot be text-verified; needs consensus"
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        "pages_sent": 7,
        "cost_usd": 0.2538,
        "at": "2026-10-23T12:21:59"
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        "pages": 7,
        "sha256": "6504a56faf506e8e",
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      "cad": "KiCad official (CC-BY-SA 4.0)",
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        "described": 9,
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  "metadata": {
    "specs": {
      "Manufacturer": "Winsok Semicon",
      "Package": "DFN-8(5x6)",
      "Category": "Transistors/Thyristors",
      "Pins": "9"
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          "name": "Continuous Drain Current",
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          "name": "Continuous Drain Current",
          "symbol": "ID@TC=100℃",
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          "name": "Pulsed Drain Current",
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          "name": "Single Pulse Avalanche Energy",
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          "name": "Avalanche Current",
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          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 14,
          "conditions": "",
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        {
          "name": "Total Power Dissipation",
          "symbol": "PD@Tc=25℃",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 31,
          "conditions": "",
          "source_page": 1,
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        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
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        },
        {
          "name": "Operating Junction Temperature Range",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
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        {
          "name": "Thermal Resistance Junction-Ambient",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": null,
          "max": 55,
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        {
          "name": "Thermal Resistance Junction-Case",
          "symbol": "RθJC",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": null,
          "max": 4.1,
          "conditions": "",
          "source_page": 1,
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        },
        {
          "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": 7,
          "max": 9.5,
          "conditions": "",
          "source_page": 2,
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        {
          "name": "Static Drain-Source On-Resistance",
          "symbol": "RDS(ON)",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 11,
          "max": 15,
          "conditions": "VGS=4.5V , ID=15A",
          "source_page": 2,
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        {
          "name": "Gate Threshold Voltage",
          "symbol": "VGS(th)",
          "kind": "electrical",
          "unit": "V",
          "min": 1.2,
          "typ": 1.6,
          "max": 2.5,
          "conditions": "VGS=VDS , ID =250uA",
          "source_page": 2,
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        {
          "name": "Drain-Source Leakage Current",
          "symbol": "IDSS",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "VDS=32V , VGS=0V , TJ=25℃",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "Drain-Source Leakage Current",
          "symbol": "IDSS",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "VDS=32V , VGS=0V , TJ=55℃",
          "source_page": 2,
          "source": "datasheet"
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        {
          "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": "Continuous Source Current",
          "symbol": "IS",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "VG=VD=0V , Force Current",
          "source_page": 2,
          "source": "datasheet"
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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": "BVDSS Temperature Coefficient",
          "symbol": "△BVDSS/△TJ",
          "kind": "temperature_coefficient",
          "unit": "V/℃",
          "min": null,
          "typ": 0.043,
          "max": null,
          "conditions": "Reference to 25℃ , ID=1mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "VGS(th) Temperature Coefficient",
          "symbol": "△VGS(th)",
          "kind": "temperature_coefficient",
          "unit": "mV/℃",
          "min": null,
          "typ": -6.94,
          "max": null,
          "conditions": "VGS=VDS , ID =250uA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Forward Transconductance",
          "symbol": "gfs",
          "kind": "electrical",
          "unit": "S",
          "min": null,
          "typ": 13,
          "max": null,
          "conditions": "VDS=5V , ID=15A",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "Gate Resistance",
          "symbol": "Rg",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.8,
          "max": null,
          "conditions": "VDS=0V , VGS=0V , f=1MHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Total Gate Charge (10V)",
          "symbol": "Qg",
          "kind": "electrical",
          "unit": "nC",
          "min": null,
          "typ": 9.4,
          "max": null,
          "conditions": "VDS=20V , VGS=10V , ID=20A",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Gate-Source Charge",
          "symbol": "Qgs",
          "kind": "electrical",
          "unit": "nC",
          "min": null,
          "typ": 1.9,
          "max": null,
          "conditions": "VDS=20V , VGS=10V , ID=20A",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Gate-Drain Charge",
          "symbol": "Qgd",
          "kind": "electrical",
          "unit": "nC",
          "min": null,
          "typ": 6,
          "max": null,
          "conditions": "VDS=20V , VGS=10V , ID=20A",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Turn-On Delay Time",
          "symbol": "Td(on)",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 12,
          "max": null,
          "conditions": "VDD=20V , VGEN=10V , RG=1Ω, ID=1A ,RL=15Ω",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "Rise Time",
          "symbol": "Tr",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 10,
          "max": null,
          "conditions": "VDD=20V , VGEN=10V , RG=1Ω, ID=1A ,RL=15Ω",
          "source_page": 2,
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        {
          "name": "Turn-Off Delay Time",
          "symbol": "Td(off)",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 25,
          "max": null,
          "conditions": "VDD=20V , VGEN=10V , RG=1Ω, ID=1A ,RL=15Ω",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "Fall Time",
          "symbol": "Tf",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 11,
          "max": null,
          "conditions": "VDD=20V , VGEN=10V , RG=1Ω, ID=1A ,RL=15Ω",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input Capacitance",
          "symbol": "Ciss",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 700,
          "max": null,
          "conditions": "VDS=20V , VGS=0V , f=1MHz",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "Output Capacitance",
          "symbol": "Coss",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 132,
          "max": null,
          "conditions": "VDS=20V , VGS=0V , f=1MHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reverse Transfer Capacitance",
          "symbol": "Crss",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 108,
          "max": null,
          "conditions": "VDS=20V , VGS=0V , f=1MHz",
          "source_page": 2,
          "source": "datasheet"
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