A 12V fan is a small electric fan powered by a 12-volt DC supply, commonly used in electronics, automotive, solar systems, and cooling applications.
 
Key Features
Voltage: 12V DC (direct current)
Current Draw: Typically between 0.1A to 0.6A, depending on size and speed
Sizes: Common sizes are 40mm, 60mm, 80mm, 120mm (measured by side length)
Power Consumption: Around 1–7 watts
Connector: Usually 2-wire (positive & negative) or 3-wire (for RPM monitoring), sometimes 4-wire (PWM speed control)
Speed: 1,000–5,000 RPM (varies by model)
Airflow: Measured in CFM (Cubic Feet per Minute)