N-Channel 30 V 5.7A (Ta) 1.4W (Ta) Surface Mount SOT-23-3
The AO3400A N-Channel MOSFET is a 30V N-channel enhancement-mode MOSFET designed using trench MOSFET technology. It is widely used for load switching, DC-DC converters, motor driving, and PWM control applications due to its very low on-resistance and compact SOT-23 package.
It is especially popular in small electronics and embedded systems because it can be driven directly by 3.3V or 5V logic signals, making it ideal for microcontroller-based designs.
Key Features
Drain-Source Voltage (VDS): 30V
Continuous Drain Current (ID): up to 5.7A (at 25°C)
Ultra-low RDS(on):
~26.5 mΩ @ VGS = 10V
~32 mΩ @ VGS = 4.5V
~48 mΩ @ VGS = 2.5V
Logic-level gate drive (works well with MCU GPIOs)
Fast switching performance (ns-range switching times)
Low gate charge (~6–7 nC) → efficient switching
Compact SOT-23 package for space-saving PCB design
Low power dissipation (~1.4W typical at 25°C ambient)
Operating temperature: −55°C to +150°C
Typical Applications
Load switching (LEDs, sensors, small motors)
Power management in battery-powered devices
DC-DC converters
PWM control circuits
Fan and heater control in embedded systems
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