component
EX3400B
Public Made by Adomby adom
Existar MOSFETs, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownEX3400B
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ex3400b.step/ex3400b.glbare 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, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).