AO3402 30V 4A N-Channel MOSFET SOT-23

AO3402 30V 4A N-Channel MOSFET is a compact yet powerful component essential for a wide range of electronic circuits. Housed in a tiny SOT-23 package, this MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) acts as a high-speed electronic switch or amplifier. Engineers and designers frequently choose this component for its low on-resistance and ability to handle moderate currents, making it an excellent choice for switching applications in battery management systems, power converters, and motor control. Its small footprint allows for high-density designs, perfect for modern, miniaturized electronics.

Key Features:

• Low On-Resistance: Experience minimal power loss with a low on-resistance of just 45mΩ at VGS=10V, which helps improve circuit efficiency.
• High-Speed Switching: The device’s fast switching characteristics make it ideal for high-frequency applications like DC-DC converters and PWM motor drivers.
• Compact SOT-23 Package: Its small form factor makes it suitable for space-constrained designs, including portable devices and wearable technology.
• Low Gate Charge: A low gate charge (Qg) of 4.3nC ensures fast switching and reduces the drive power needed from the control circuit.
• Robust Design: The MOSFET includes ESD (Electrostatic Discharge) protection for the gate, enhancing its reliability during handling and in operation.

Technical Specifications:

• V_DS (Drain-Source Voltage): 30V
• I_D (Continuous Drain Current): 4A (at VGS=10V)
• R_DS(ON) (On-Resistance): 45mΩ (VGS=10V), 60mΩ (VGS=4.5V)
• V_GS(th) (Gate Threshold Voltage): 0.6V to 1.5V
• Power Dissipation (P_D): 1.4W
• Operating Temperature Range: -55°C to 150°C

Mechanical Specifications:

• Package Type: SOT-23 (Small Outline Transistor)
• Mounting: Surface Mount Technology (SMT)
• Pins: 3
• Material: Epoxy molding compound.

Dimensions:

• Body Length: ~2.9 mm
• Body Width: ~1.3 mm
• Height: ~1.1 mm

Pinout and Wiring:

• Pin 1 (Gate – G): Controls the flow of current between the Drain and Source.
• Pin 2 (Source – S): The terminal where current exits the MOSFET.
• Pin 3 (Drain – D): The terminal where current enters the MOSFET.
• Wiring Note: Connect the gate pin to your control signal (e.g., from a microcontroller). Connect the source pin to ground, and the drain pin to the load you want to switch.

Datasheet Reference:

• Download Datasheet

Commonly Used In:

• Small Signal Switching: Ideal for switching low-voltage circuits on and off efficiently.
• Power Management: You can use it in battery protection circuits, load switches, and power distribution systems.
• Motor Control: Control small DC motors or solenoids in a variety of applications.

Applications:

• Load Switches: Efficiently switch power to a part of a circuit to save energy.
• DC-DC Converters: Essential for boosting or bucking voltages in power supply circuits.
• LED Lighting: Control the brightness of LED strips or individual LEDs using PWM.
• Battery Protection: Manage charging and discharging cycles in small lithium-ion battery packs.

Equivalent Models:

• 2N7002: A widely used N-channel MOSFET in a similar SOT-23 package, often chosen for general-purpose switching.
• BS170: A Through-hole alternative for hobbyists and educational projects.
• BSS138: Another popular SOT-23 N-channel MOSFET with a similar footprint and a lower voltage rating.

Package Includes:

• 1 x AO3402 30V 4A N-Channel MOSFET SOT-23