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WST4040

Public Made by Adom

by adom

Winsok Semicon MOSFETs, SOT-23-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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WST4040

Winsok Semicon · MOSFETs · SOT-23-3L

WST4040 from Winsok Semicon, in a SOT-23-3L. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 G input Gate; gate-source voltage limited to ±20 V, threshold 0.6 to 1.6 V (1.0 V typ) at 250 µA.
2 S passive Source; continuous source current up to 1 A through the body diode, pulsed 16 A.
3 D passive Drain; drain-source voltage rated 40 V, continuous drain current 5.8 A and pulsed 16 A.

Key specifications

Parameter Value
Manufacturer Winsok Semicon
Package SOT-23-3L
Category Transistors/Thyristors
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Drain-Source Voltage VDS 40 V 1
Gate-Source Voltage VGS -20 20 V 1
Continuous Drain Current, TC=25℃ ID 5.8 A VGS @ 4.5V 1
Continuous Drain Current, TC=70℃ ID 2.5 A VGS @ 4.5V 1
Pulsed Drain Current IDM 16 A 1
Total Power Dissipation, TA=25℃ PD 1 W 1
Storage Temperature Range TSTG -55 150 ℃ 1
Operating Junction Temperature Range TJ -55 150 ℃ 1
Thermal Resistance Junction-ambient RθJA 125 ℃/W 1
Thermal Resistance Junction-Case RθJC 75 ℃/W 1
Single Pulse Avalanche Energy EAS 9 mJ VDD=25V, L=0.1mH, IAS=2A 2
Continuous Source Current IS 1 A VG=VD=0V, Force Current 2
Pulsed Source Current ISM 16 A 2
Diode Forward Voltage VSD 1.2 V VGS=0V, IS=1A, TJ=25℃ 2
Drain-Source Breakdown Voltage BVDSS 40 V VGS=0V, ID=250uA 2
Static Drain-Source On-Resistance RDS(ON) 35 50 mΩ VGS=10V, ID=3A 2
Gate Threshold Voltage VGS(th) 0.6 1 1.6 V VGS=VDS, ID=250uA 2
Drain-Source Leakage Current, TJ=25℃ IDSS 1 uA VDS=32V, VGS=0V, TJ=25℃ 2
Drain-Source Leakage Current, TJ=55℃ IDSS 5 uA VDS=32V, VGS=0V, TJ=55℃ 2
Gate-Source Leakage Current IGSS -100 100 nA VGS=±20V, VDS=0V 2
Gate-Source Charge Qgs 0.8 3.5 nC VDS=20V, VGS=4.5V, ID=2A 2
Gate-Drain Charge Qgd 1.65 4.2 nC VDS=20V, VGS=4.5V, ID=2A 2
Turn-On Delay Time Td(on) 1.5 4.8 ns VDD=20V, VGS=10V, RG=3.3Ω, ID=1A 2
Turn-Off Delay Time Td(off) 18 44 ns VDD=20V, VGS=10V, RG=3.3Ω, ID=1A 2
Fall Time Tf 5.9 8 ns VDD=20V, VGS=10V, RG=3.3Ω, ID=1A 2

CAD (KiCad official)

  • Symbol: WST4040
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3L (KiCad packages3D, STEP)
  • 3D model files: wst4040-etched.step / wst4040-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); wst4040.step / wst4040.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Winsok Semicon datasheet (5 pp, sha256 740fd14bc154952e, retrieved 2026-10-09, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF