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WST3400A

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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WST3400A

Winsok Semicon · MOSFETs · SOT-23-3L

WST3400A 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; absolute maximum gate-source voltage is ±12V with a gate threshold of 0.5V min to 1.2V max at ID=250uA.
2 S passive Source of the N-channel MOSFET; continuous source (body diode) current is 1.8A max.
3 D passive Drain; absolute maximum drain-source voltage is 30V with continuous drain current of 6.4A steady state and pulsed drain current of 23A.

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 30 V 1
Gate-Source Voltage VGS -12 12 V 1
Continuous Drain Current, VGS @ 10V ID@Tc=25℃ 7.7 A 10s 1
Continuous Drain Current, VGS @ 10V ID@Tc=25℃ 6.4 A Steady State 1
Continuous Drain Current, VGS @ 10V ID@Tc=70℃ 6.2 A 10s 1
Continuous Drain Current, VGS @ 10V ID@Tc=70℃ 5.4 A Steady State 1
Pulsed Drain Current IDM 23 A 1
Total Power Dissipation PD@TA=25℃ 1.32 W 10s 1
Total Power Dissipation PD@TA=25℃ 1 W Steady State 1
Total Power Dissipation PD@TA=70℃ 0.84 W 10s 1
Total Power Dissipation PD@TA=70℃ 0.64 W Steady State 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-Ambient RθJA 95 ℃/W t ≤10s 1
Thermal Resistance Junction-Case RθJC 80 ℃/W 1
Drain-Source Breakdown Voltage BVDSS 30 V VGS=0V , ID=250uA 2
Gate Resistance Rg 2.5 5 Ω VDS=0V , VGS=0V , f=1MHz 2
Static Drain-Source On-Resistance RDS(ON) 20 31 mΩ VGS=4.5V , ID=5A 2
Gate Threshold Voltage VGS(th) 0.5 0.8 1.2 V VGS=VDS , ID=250uA 2
Drain-Source Leakage Current IDSS 1 uA VDS=24V , VGS=0V , TJ=25℃ 2
Drain-Source Leakage Current IDSS 5 uA VDS=24V , VGS=0V , TJ=55℃ 2
Gate-Source Leakage Current IGSS -100 100 nA VGS=±12V , VDS=0V 2
Total Gate Charge (4.5V) Qg 5.8 8.4 nC VDS=15V , VGS=4.5V , ID=5A 2
Gate-Source Charge Qgs 2.4 3.5 nC VDS=15V , VGS=4.5V , ID=5A 2
Gate-Drain Charge Qgd 2 2.9 nC VDS=15V , VGS=4.5V , ID=5A 2
Turn-On Delay Time Td(on) 2.3 4.8 ns VDD=15V , VGS=10V , RG=3.3Ω , ID=5A 2
Rise Time Tr 7.6 14 ns VDD=15V , VGS=10V , RG=3.3Ω , ID=5A 2
Turn-Off Delay Time Td(off) 21 44 ns VDD=15V , VGS=10V , RG=3.3Ω , ID=5A 2
Fall Time Tf 3.8 8 ns VDD=15V , VGS=10V , RG=3.3Ω , ID=5A 2
Input Capacitance Ciss 520 880 pF VDS=15V , VGS=0V , f=1MHz 2
Output Capacitance Coss 72 112 pF VDS=15V , VGS=0V , f=1MHz 2
Reverse Transfer Capacitance Crss 56 91 pF VDS=15V , VGS=0V , f=1MHz 2
Continuous Source Current IS 1.8 A VG=VD=0V , Force Current 2
Pulsed Source Current ISM 22 A 2
Diode Forward Voltage VSD 1.2 V VGS=0V , IS=1A , TJ=25℃ 2

CAD (KiCad official)

  • Symbol: WST3400A
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3L (KiCad packages3D, STEP)
  • 3D model files: wst3400a-etched.step / wst3400a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); wst3400a.step / wst3400a.glb are the bare package body.

Provenance

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

  • Datasheet: Winsok Semicon datasheet (5 pp, sha256 708cbafcf3f337a6, 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