The radial fans that draw in air from both sides represent further high-tech miniature fans of the SEPA® range that can be ideally combined with profile heat sinks or heat pipes. They owe these features to their flat design which originates from the ultrabook development and enables a height of a mere 5 mm. Thanks to their virtually linear curve, the fans can be used in a wide variety of industrial applications which also benefit from the use of long-life sleeve bearings (L10 = 75.000 h, MTBF = 225.000@20°C).
These models have a standard PWM input for precise speed control with a duty cycle of 0.7 to 2.5 VDC (23 kHz) and a pulse width of 30…100%. A tacho output monitors the correct function of the fans based on a square-wave type signal, whose frequency is equivalent to double the rotor speed.
Thanks to a light-weight rotor, precision balancing coupled with an extremely sturdy and shape-retaining frame of fibreglass-reinforced PBT, the fans are highly resistant to impact and vibration. Further standard features of these models are the permanent electrical protection against reverse polarity, blocking and thermal overloading.