DC axial fans are designed to create airflow with a high flow rate and medium pressure. Axial fans have an impeller surrounded by blades which works in a similar way to a propeller. The motor of the fan is integrated into the hub of the impeller to provide a compact fan unit. The impeller draws in air axially in a parallel direction to the revolving motor shaft and forces air out in the same direction. The axial fan is surrounded by a flanged housing with mounting holes allowing it to be mounted inside equipment.

• External Rotor Motor: Unlike traditional internal rotor motors where the rotating shaft is surrounded by electromagnetic coils ebm-papst fans feature an external rotor motor. In an external rotor motor the magnetic coils are encased inside a rotating shell. The advantage of this design is that external rotor motors are more compact in size, run more efficiently and are less prone to overheating than internal rotor motors
• Brushless Motor: These DC fans have brushless motors where the electrical switching is carried out by electronic circuits rather than metal brushes. As they don't have any brushes to wear out, brushless motors are more efficient and reliable than AC motors and have a longer life span. The integrated electronics of brushless motors also allow extra interface options and motor protection to be built into the fan.

The fan impellers and the inner shape housing of the ebm-papst compact DC axial fans are expertly designed using state-of-the-art computer software. The blades are aerodynamically engineered and dynamically balanced in two planes for optimum performance. The air output and motor performance are precisely matched to the size of the fan which results in low noise, even at high
back pressure.

These 8400 N/2GH DC axial fans have an integrated electronic tachometer that produces a signal giving information about the speed of the fan. A separate wire on the fan is used to transfer the signal. This feature enables constant external monitoring of the fan’s motor speed.

• Performance from 33m³/h to a maximum of 79m³/h, depending on variant
• Low, medium and high speed versions available
• Tachometer output for monitoring of fan speed
• Fan motor integrated into the impeller hub to form a compact fan unit
• Efficient and reliable brushless motor
• Air exhaust over the struts
• Compact 80 x 80 mm design with a small installation depth of 25 mm
• Expertly designed for maximum efficiency and performance
• Choice of PAPST Sintec sleeve bearings for low noise and low shock sensitivity or durable ball bearings for high ambient temperatures and high service life
• Aerodynamic blades for low noise level and increased efficiency
• Flanged housings with mounting holes for installation into equipment
• Lightweight design with glass fibre reinforced plastic housing and impeller
• Reverse polarity and locked rotor protection
• IP20 protection
• Service life of 117500 hours and above

These 8400 N series DC axial fans feature AWG 24, TR 64 single wires which are stripped and tin plated at the end. Stock numbers 426-360, 426-332, 426-376, 613-7439 and 426-354 are fitted with a 3 pin molex connector

• Metal and plastic finger guards: stock numbers 826-1376, 826-1379, 250-870, 101-8068, 512-569 and 826-1373
• Filter Fan Guard: stock number 221-336, 507-911 and 200-7659

These DC axial fans are designed for hot or cold air exchange in a wide range of devices and systems. These applications include the following:

• Audio/Video
• Catering
• Control equipment
• Data storage
• Domestic Appliances
• Electronics
• Heating and Ventilation
• Laboratory
• Lasers
• Lighting
• Machines & Industrial
• Pharmaceutical
• Power optimisation
• Power Supplies