A 5V fan is a DC cooling fan powered by a 5-volt supply, commonly used in low-power electronics, such as Raspberry Pi, Arduino projects, and portable devices.
 
Key Features
Voltage: 5V DC
Current Draw: Typically 0.05A to 0.3A (50mA to 300mA)
Sizes: Common sizes are 30mm, 40mm, 50mm, 60mm
Power Consumption: Around 0.25–1.5 watts
Connector: Usually a 2-pin or 3-pin connector
Speed: 3,000–10,000 RPM depending on size
Airflow: Lower than 12V fans (for small enclosures)