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WST3400B

Public Made by Adom

by adom

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

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WST3400B

Winsok Semicon · MOSFETs · SOT-23L

WST3400B from Winsok Semicon, in a SOT-23L. 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 terminal of the N-channel MOSFET; the datasheet rates gate-source voltage at ±12 V.
2 S passive Source terminal of the N-channel MOSFET; the datasheet rates continuous drain current at 5.6 A (Tc=25℃) and pulsed current at 18 A.
3 D passive Drain terminal of the N-channel MOSFET; the datasheet rates drain-source voltage at 30 V.

Key specifications

Parameter Value
Manufacturer Winsok Semicon
Package SOT-23L
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 Printed as ±12 V 1
Continuous Drain Current ID@Tc=25℃ 5.6 A VGS @ 10V 1
Continuous Drain Current ID@Tc=70℃ 4.2 A VGS @ 10V 1
Pulsed Drain Current IDM 18 A 1
Total Power Dissipation PD@TA=25℃ 1 W TA=25℃ 1
Total Power Dissipation PD@TA=70℃ 0.64 W TA=70℃ 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
Static Drain-Source On-Resistance RDS(ON) 30 38 mΩ VGS=4.5V, ID=5A 2
Static Drain-Source On-Resistance RDS(ON) 32 mΩ VGS=2.5V, ID=4A 2
Gate Threshold Voltage VGS(th) 0.5 0.8 1 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=±20V, VDS=0V 2
Gate Resistance Rg 2.5 5 Ω VDS=0V, VGS=0V, f=1MHz 2
Total Gate Charge (4.5V) Qg 5.5 8.4 nC VDS=15V, VGS=4.5V, ID=5A 2
Gate-Source Charge Qgs 2.1 3.5 nC VDS=15V, VGS=4.5V, ID=5A 2
Gate-Drain Charge Qgd 1.5 2.9 nC VDS=15V, VGS=4.5V, ID=5A 2
Turn-On Delay Time Td(on) 2.2 4.2 ns VDD=15V, VGS=10V, RG=3.3Ω, ID=5A 2
Rise Time Tr 6.8 9 ns VDD=15V, VGS=10V, RG=3.3Ω, ID=5A 2
Turn-Off Delay Time Td(off) 20 40 ns VDD=15V, VGS=10V, RG=3.3Ω, ID=5A 2
Fall Time Tf 3.5 5 ns VDD=15V, VGS=10V, RG=3.3Ω, ID=5A 2
Input Capacitance Ciss 525 600 pF VDS=15V, VGS=0V, f=1MHz 2
Output Capacitance Coss 57 112 pF VDS=15V, VGS=0V, f=1MHz 2
Reverse Transfer Capacitance Crss 45 91 pF VDS=15V, VGS=0V, f=1MHz 2
Continuous Source Current IS 5.6 A VG=VD=0V, Force Current 2
Pulsed Source Current ISM 18 A 2
Diode Forward Voltage VSD 1.4 V VGS=0V, IS=1A, TJ=25℃ 2

CAD (KiCad official)

  • Symbol: WST3400B
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23L (KiCad packages3D, STEP)
  • 3D model files: wst3400b-etched.step / wst3400b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); wst3400b.step / wst3400b.glb are the bare package body.

Provenance

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

  • Datasheet: Winsok Semicon datasheet (6 pp, sha256 9a6331336f044a6a, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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