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KO3404

Public Made by Adom

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

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KO3404

KEXIN · MOSFETs · SOT-23

KO3404 from KEXIN, in a SOT-23. 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 enhancement MOSFET, with a gate-source voltage rating of ±20 V.
2 S passive Source terminal of the N-channel enhancement MOSFET, rated for a continuous drain current of 5.8 A at Ta=25°C.
3 D passive Drain terminal of the N-channel enhancement MOSFET, rated for a drain-source voltage of 30 V.

Key specifications

Parameter Value
Manufacturer KEXIN
Package SOT-23
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 Breakdown Voltage VDSS 30 V ID=250 μA, VGS=0V 2
Zero Gate Voltage Drain Current IDSS 1 μA VDS=24V, VGS=0V 2
Zero Gate Voltage Drain Current IDSS 5 μA VDS=24V, VGS=0V, TJ=55 2
Gate-Body leakage current IGSS 100 nA VDS=0V, VGS=20V 2
Gate Threshold Voltage VGS(th) 1 1.9 3 V VDS=VGS, ID=250 μA 2
On state drain current ID(ON) 20 A VGS=4.5V, VDS=5V 2
Static Drain-Source On-Resistance RDS(ON) 22.5 28 mΩ VGS=10V, ID=5.8A 2
Static Drain-Source On-Resistance (TJ=125°C) RDS(ON) 31.3 38 mΩ VGS=10V, ID=5.8A, TJ=125 2
Static Drain-Source On-Resistance RDS(ON) 34.5 43 mΩ VGS=4.5V, ID=5.0A 2
Forward Transconductance gFS 10 14.5 S VDS=5V, ID=5.8A 2
Diode Forward Voltage VSD 0.76 1 V IS=1A 2
Maximum Body-Diode Continuous Current IS 2.5 A 2
Input Capacitance Ciss 680 820 pF VGS=0V, VDS=15V, f=1MHz 2
Gate resistance Rg 3 3.6 Ω VGS=0V, VDS=0V, f=1MHz 2
Total Gate Charge (10V) Qg 13.88 17 nC VGS=10V, VDS=15V, ID=5.8A 2
Total Gate Charge (4.5V) Qg 6.78 8.1 nC 2
Turn-On Delay Time tD(on) 4.6 6.5 ns VGS=10V, VDS=15V, RL=2.7 ,RGEN=3 2
Turn-On Rise Time tr 3.8 5.7 ns VGS=10V, VDS=15V, RL=2.7 ,RGEN=3 2
Turn-Off Delay Time tD(off) 20.9 30 ns VGS=10V, VDS=15V, RL=2.7 ,RGEN=3 2
Turn-Off Fall Time tf 5 7.5 ns VGS=10V, VDS=15V, RL=2.7 ,RGEN=3 2
Body Diode Reverse Recovery Time trr 16.1 21 ns IF=5.8A, dI/dt=100A/μs 2
Body Diode Reverse Recovery Charge Qrr 7.4 10 nC IF=5.8A, dI/dt=100A/μs 2
Drain-Source Voltage VDS 30 V 1
Gate-Source Voltage VGS -20 20 V 1
Continuous Drain Current ID 5.8 A Ta=25°C 1
Continuous Drain Current ID 4.9 A Ta=100°C 1
Pulsed Drain Current IDM 20 A 1
Power Dissipation PD 1.4 W Ta=25°C 1
Power Dissipation PD 1 W Ta=70°C 1
Junction Temperature TJ 150 °C 1
Storage Temperature Range Tstg -55 150 °C 1
Thermal Resistance Junction-to-Ambient RthJA 90 °C/W t ≤ 5sec 1
Thermal Resistance Junction-to-Ambient RthJA 125 °C/W Steady State 1
Thermal Resistance Junction-to-Lead RthJL 60 °C/W 1
Output Capacitance Coss 102 pF VGS=0V, VDS=15V, f=1MHz 2
Reverse Transfer Capacitance Crss 77 pF VGS=0V, VDS=15V, f=1MHz 2
Gate Source Charge Qgs 1.8 nC 2
Gate Drain Charge Qgd 3.12 nC 2

CAD (KiCad official)

  • Symbol: KO3404
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: ko3404-etched.step / ko3404-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ko3404.step / ko3404.glb are the bare package body.

Provenance

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

  • Datasheet: KEXIN datasheet (4 pp, sha256 f1c53915b3d2abb5, retrieved 2026-10-19, 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