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AO3400 / AO3400A N-Channel MOSFET — 30V 5.7A SOT-23, Logic-Level Gate (20-Pack)
AO3400 / AO3400A N-Channel MOSFET 30V 5.7A SOT-23, Logic-Level Gate (20-Pack)
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AO3400 / AO3400A — 30V 5.7A N-Channel MOSFET, SOT-23 Package
The AO3400 (also marked AO3400A) is a popular 30V 5.7A N-channel MOSFET in a compact SOT-23 SMD package. With a logic-level gate threshold (VGS(th) = 0.45–1.0V) and ultra-low RDS(on) = 26mΩ at VGS=4.5V, it switches efficiently from 3.3V and 5V microcontroller GPIO pins without a gate driver. Each pack contains 20 pieces.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-23 (SMD) |
| Channel Type | N-Channel Enhancement MOSFET |
| VDS | 30V |
| ID @ 25°C | 5.7A |
| VGS(th) | 0.45V – 1.0V (logic-level) |
| RDS(on) @ VGS=4.5V | 26mΩ max |
| RDS(on) @ VGS=2.5V | 40mΩ max |
| Qg | 5.5nC |
| Tj | -55°C to +150°C |
| Quantity | 20 pieces |
Why Choose AO3400?
- Logic-level gate — fully switches with 3.3V or 5V GPIO, no gate driver needed
- Ultra-low RDS(on) 26mΩ — minimal conduction loss at full load
- 5.7A continuous — handles substantial load currents in a tiny SOT-23 package
- 5.5nC gate charge — fast switching with minimal drive current
- 30V VDS — suitable for 5V, 12V, and 24V switching applications
- 20-pack value — enough for multiple projects and prototyping stock
Typical Applications
- Arduino / ESP32 load switching — switch motors, LEDs, and relays directly from GPIO
- LED driver — PWM dimming of LED strips and high-power LEDs
- Motor control — low-side switch for DC motors and solenoids
- Battery protection — low-side disconnect switch in BMS circuits
- DC-DC converter — synchronous rectifier in buck converter designs
- Power management — load switch for portable device power sequencing
FAQ
Q: Can AO3400 be driven from a 3.3V GPIO?
A: Yes. With VGS(th) max = 1.0V, the AO3400 is fully enhanced at 3.3V. RDS(on) at VGS=2.5V is 40mΩ — still very low for most applications.
Q: Is AO3400A the same as AO3400?
A: Yes. AO3400A is a revised version with identical electrical specifications and pin-compatible.
Package Contents
- 20× AO3400 / AO3400A SOT-23 N-Channel MOSFET (new, original)
