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EX3401A

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

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EX3401A

Existar · MOSFETs · SOT-23

EX3401A 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; controls the P-channel MOSFET, with VGS limited to ±20 V absolute maximum and threshold VGS(th) of -0.5 to -1.4 V at ID = -250 µA.
2 S passive Source; main current terminal of the P-channel MOSFET, with VDS rated -30 V and continuous ID of -3.6 A at TA=25°C.
3 D passive Drain; single lead on the opposite side of the package, rated VDS -30 V, continuous ID -3.6 A and pulsed ID -14.4 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 -20 20 V 2
Continuous drain current ID -3.6 A TA=25°C 2
Continuous drain current ID -2.3 A TA=100°C 2
Pulsed drain current ID,pulse -14.4 A 2
Avalanche energy, single pulse EAS 20 mJ 2
Power dissipation PD 1.2 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 103 °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) -0.5 -1.4 V VDS = VGS, ID = -250 µA 2
Gate-body leakage IGSS -100 100 nA VDS = 0 V, VGS = ±10 V 2
Zero gate voltage drain current IDSS 1 µA VDS = -30 V, VGS = 0 V 2
Drain-source on-resistance RDS(on) 46 60 mΩ VGS = -10 V, ID = -2 A 2
Drain-source on-resistance RDS(on) 50 68 mΩ VGS = -4.5 V, ID = -1.5 A 2
Forward transconductance gfs 8 S VDS = -5 V, ID = -2 A 2
Gate resistance Rg 6.7 Ω f=1MHz 3
Total gate charge Qg 6.5 nC VDS = -15 V, ID = -2 A, VGS = -10 V 3
Gate-source charge Qgs 1.4 nC VDS = -15 V, ID = -2 A, VGS = -10 V 3
Gate-drain charge Qgd 1.6 nC VDS = -15 V, ID = -2 A, VGS = -10 V 3
Turn-on delay time td(on) 10 ns VDS = -15 V, VGS = -10 V, RL = 7.5 Ω, RGEN = 3 Ω 3
Rise time tr 80 ns VDS = -15 V, VGS = -10 V, RL = 7.5 Ω, RGEN = 3 Ω 3
Turn-off delay time td(off) 150 ns VDS = -15 V, VGS = -10 V, RL = 7.5 Ω, RGEN = 3 Ω 3
Fall time tf 350 ns VDS = -15 V, VGS = -10 V, RL = 7.5 Ω, RGEN = 3 Ω 3
Input capacitance Ciss 707 pF VDS = -15 V, VGS = 0 V, f = 1MHz 3
Output capacitance Coss 54 pF VDS = -15 V, VGS = 0 V, f = 1MHz 3
Reverse transfer capacitance Crss 45 pF VDS = -15 V, VGS = 0 V, f = 1MHz 3
Diode forward voltage VSD 1.2 V VGS = 0 V, IF = -2 A 3
Reverse recovery time trr 35 ns IS = -2 A, di/dt = 100 A/μs 3
Reverse recovery charge Qrr 5 nC IS = -2 A, di/dt = 100 A/μs 3

CAD (KiCad official)

  • Symbol: EX3401A
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: ex3401a-etched.step / ex3401a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ex3401a.step / ex3401a.glb are the bare package body.

Provenance

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

  • Datasheet: Existar datasheet (7 pp, sha256 937e0db78619de5b, retrieved 2026-10-17, 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