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EX3400B

Public Made by Adom

by adom

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

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EX3400B

Existar · MOSFETs · SOT-23

EX3400B from Existar, 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; gate-source voltage limited to ±12 V absolute maximum, threshold VGS(th) 0.45 V min to 1.25 V max at ID = 250 µA.
2 S passive Source; the source terminal of the N-channel MOSFET, with the body diode (VSD 1.2 V max at IF = 2 A) running from source to drain.
3 D passive Drain; rated for VDS 30 V maximum, continuous drain current 5.8 A at TA = 25°C and pulsed 23.2 A.

Key specifications

Parameter Value
Manufacturer Existar
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 voltage VDS 30 V 2
Gate-source voltage VGS -12 12 V 2
Continuous drain current ID 5.8 A TA=25°C 2
Continuous drain current ID 3.6 A TA=100°C 2
Pulsed drain current ID,pulse 23.2 A 2
Avalanche energy, single pulse EAS 20 mJ single pulse 2
Power dissipation PD 1.4 W TA=25°C 2
Power dissipation PD 0.5 W TA=100°C 2
Operating junction and storage temperature range TJ, Tstg -55 150 ℃ 2
Thermal resistance, junction-to-ambient RθJA 90 °C/W Steady state 2
Drain to source breakdown voltage V(BR)DSS 30 V VGS = 0, ID = 250 µA 2
Gate-source threshold voltage VGS(th) 0.45 1.25 V VDS = VGS, ID = 250 µA 2
Gate-body leakage IGSS -100 100 nA VDS = 0 V, VGS = ±12 V 2
Zero gate voltage drain current IDSS 1 µA VDS = 30 V, VGS = 0 V 2
Drain-source on-resistance RDS(on) 20 26 mΩ VGS = 10 V, ID = 3 A 2
Drain-source on-resistance RDS(on) 22 28.5 mΩ VGS = 4.5 V, ID = 2 A 2
Forward transconductance gfs 7.8 S VDS = 5 V, ID = 2 A 2
Gate resistance Rg 1.9 Ω f=1MHz 3
Total gate charge Qg 20 nC VDS = 15 V, ID = 2 A, VGS = 4.5 V 3
Gate-source charge Qgs 2 nC VDS = 15 V, ID = 2 A, VGS = 4.5 V 3
Gate-drain charge Qgd 2.2 nC VDS = 15 V, ID = 2 A, VGS = 4.5 V 3
Turn-on delay time td(on) 5 ns VDS = 15 V, VGS = 4.5 V, RL = 7.5 Ω, RGEN = 3 Ω 3
Rise time tr 12 ns VDS = 15 V, VGS = 4.5 V, RL = 7.5 Ω, RGEN = 3 Ω 3
Turn-off delay time td(off) 24 ns VDS = 15 V, VGS = 4.5 V, RL = 7.5 Ω, RGEN = 3 Ω 3
Fall time tf 2 ns VDS = 15 V, VGS = 4.5 V, RL = 7.5 Ω, RGEN = 3 Ω 3
Input capacitance Ciss 696 pF 3
Output capacitance Coss 53 pF VDS =15 V, VGS = 0 V, f = 1MHz 3
Reverse transfer capacitance Crss 42 pF 3
Diode forward voltage VSD 1.2 V VGS = 0 V, IF = 2 A 3
Reverse recovery time trr 8.5 ns IS =2 A, di/dt = 100 A/μs 3
Reverse recovery charge Qrr 3.4 nC IS =2 A, di/dt = 100 A/μs 3

CAD (KiCad official)

  • Symbol: EX3400B
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: ex3400b-etched.step / ex3400b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ex3400b.step / ex3400b.glb are the bare package body.

Provenance

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

  • Datasheet: Existar datasheet (7 pp, sha256 6afe5a0d052f789d, retrieved 2026-10-18, 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