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DC cooling fans typically include the following specifications:

  1. Voltage (V): The operating voltage required for the fan, commonly 5V, 12V, 24V or 48V,Special Voltage:3.3V 15V 18V 36V 

  2. Current (A): The electrical current the fan draws during operation, measured in amperes.

  3. Power (W): The power consumption of the fan, measured in watts.

  4. Rotational Speed (RPM): The number of revolutions per minute the fan blade completes.

  5. Air Flow (CFM): The volume of air the fan can move, measured in cubic feet per minute.

  6. Static Pressure (mmH2O): The amount of pressure the fan generates, often important in applications with obstructions to airflow.

  7. Noise Level (dB): The sound emission level of the fan, measured in decibels.

  8. Bearing Type: The type of bearing used, which affects lifespan and noise, such as sleeve bearings, ball bearings, or fluid dynamic bearings.

  9. Connector Type: The type of connector for power and signal, like 2-pin, 3-pin, or 4-pin PWM.

  10. Dimensions (mm): The physical size of the fan, commonly indicated in millimeters for height, width, and thickness.

  11. Life Expectancy (hours): The expected operational lifespan of the fan.

  12. Control Method: Methods to control the fan speed, such as voltage control or PWM (Pulse Width Modulation).

  13. Material: The materials used for fan blades and housing, like plastic or metal alloys.

  14. Features: Additional attributes such as water-resistant, dust-proof, LED lighting, or temperature sensors.