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Miniature DC fans fill reliability gap

Measuring just 25x25x8mm and weighing only 5g, the new Series 250N fans from Papst meet the growing need for high reliability, miniature fans for today's compact consumer and industrial electronic applications.

Available in both 5V and 12V versions with airflow rates of up to 5m3/hr, the fans have an L10 service life of 40,000 hrs @ 20°C and will operate over a temperature range of -20°C - +70°C. The fans are also available with the option of an additional alarm signal wire, a feature not normally associated with units of this size.

Models 255N and 252N operate nominally at 9,000 r/m, and the 255H operates at 12,000 r/m with noise levels of 15dB(A) and 28dB(A) respectively. Achieving low noise figures is a critical, key challenge with miniature fans given that they have to rotate at extremely high speeds to achieve efficient flow rates. Using high quality, Sintec-Sleeve bearings, the Papst fans offer high reliability, quietness, yet comparably high flow rates.

Featuring an electronically commutated, external rotor motor, the diminutive fans have fully integrated commutation electronics and electronic protection against reverse polarity - the fans only operate when the polarity is correct. Robust, the units are made of fibreglass reinforced plastic with PBT housing and PA impeller. For ease of assembly, Papst's 250N is supplied with stripped and tinned leads of AWG 28 size. Customised connection options can be made available on request.

Papst's Series 250N fans will find favour in many applications where a reliable, quiet, small fan is required such as in laptops, notebooks, in-car navigation systems, scanners, hot spot cooling (processor chips), air sampling for temperature measurement and indeed any compact electronics application.