DC Brushless Fans (BLDC)

This Product Selection Guide contains information to help select products in the DC Brushless Fans (BLDC) category on DigiKey.com

Products in the DC fan family are electromechanical products used to induce air movement and operate from a DC power source, typically of 48 volts or less. Though virtually all such products in current production are based on brushless motor technology, some variation in their other features does occur, including provisions for speed control and feedback mechanisms.


Voltage - Rated: Indicates the nominal voltage of the device during normal operation.

Size/Dimension: The physical dimensions of the device. Typically length by height, or diameter.

Width: Typically this indicates the measurement from the front of the housing to the back of the housing.

Air Flow: Characterizes the air volume flow rate a fan can generate. Usually measured under conditions of rated voltage and zero pressure difference between a device’s inlet and outlet.

Static Pressure: Characterizes the maximum air pressure differential a fan can generate at nominal input voltage and zero flow.

Bearing Type: Indicates the technology used to provide mechanical support for a fan’s moving parts.

Fan Type: Describes a fan’s mechanical form factor.

Features: These are different capabilities or properties of the device such as auto restart or a speed sensor.

Noise: Characterizes a device’s acoustic emission levels, as measured under manufacturer-defined test conditions.

Power (Watts): Typically this rating indicates the nominal amount of power you would expect the device to consume during normal operation.

RPM: Characterizes the nominal speed at which a device rotates when rated voltage is applied. Actual speed will vary with application conditions.

Termination: Selection of termination style used to connect the device to a system, such as pin, quick connect, or wire leads.

Ingress Protection: IP (Ingress Protection) ratings such as (IP20, IP65, IP67, etc.) define how likely water and dirt will get into the system. The first number represents dirt and solid contaminants while the second represents water and liquids.

IP Ratings
Solids Liquids
1 Protected against solids larger than 50mm. Protected against vertically falling drops of water. Limited Ingress permitted.
2 Protected against solids larger than 12.5mm. Protected against vertically falling drops of water with the enclosure tilted up to 15 degrees from vertical. Limited ingress permitted.
3 Protected against solids larger than 2.5mm. Protected against spraying water up to 60 degrees from vertical. Limited ingress permitted for 3 minutes.
4 Protected against solids larger than 1mm. Protected against water splashed from any direction. Limited ingress permitted.
5 Protected against dust. Limited ingress of dust permitted. Will not affect operation of equipment 2-8 hours. Protected against jets of water. Limited ingress permitted.
6 Dust tight. No ingress of dust 2-8 hours. Protected against powerful jets of water. Limited ingress permitted.
7 ______________________ Protected against the effects of immersion in 15cm-1m for 30 minutes.
8 ______________________ Continuous immersion in water up to 3m for long periods of time.
9 ______________________ Protected against high pressure jets of hot water. (30 seconds)
9K ______________________ Protected against high pressure jets of hot water. (2 minutes)

Operating Temperature: Recommended operating temperature, typically given in a range or as a maximum. Exceeding these temperatures may affect performance or damage the device and other system components.

Approval Agency: An indication that the product meets the minimum safety standards of an approving agency. These agencies are either government entities or private third-party labs that protect consumer safety.

Weight: Indicates the overall weight of the part.



MFR PART # EE80251S2-1000U-999
DIGI-KEY PART # 259-1788-ND


DIGI-KEY PART # 603-1840-ND
MANUFACTURER Delta Electronics


Fan Basics - Another Teaching Moment

Product Training Modules
Moving Air Efficiently - ebm-pabst

Calculating Airflow/CFM
Does Stacking Fans Double the CFM?

If you have any general questions on the specifications for selecting DC Brushless Fans (BLDC), please reply using the button below. If you have questions on specific DC Brushless Fans (BLDC) please post those questions in the Fans, Thermal Management category.