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Papst 92mm ultra-quiet case fans - type 3412ngl, 23db(a).
Ultra quiet papst 9cm case fans - dc axial 3400n series. Model 3412ngl. The quietest in the industry - only 23db(a) with the sintered sleeve bearings technology. Made in germany by ebm industries. Axial fans: air flow is conducted parallel to the axis of rotation.The blower wheel in axial fans is similar to the propeller of an airplane. Airflow is conducted to a great extent, parallel to the axis of rotation or in other words the axial direction. Axial fans have the best airflow and power consumtion when used in a equalized air pressure configuration. Power consumtion rises as counter pressure is increased.Axial case fans have an external housing and have the motor integrated into the blower wheel hub. This compact design is space-saving and allows them to be used in a wide range of applications. All case fans should have appropriate mounting holes.Features: dc fans with electronically commutated external rotor motor. Fully integrated commutation electronics. With electronic protection against reverse polarity, blocking and overloading; partially impedance protected. Fan of fiberglass reinforced plastic. Pbtp housing, pa impeller. Air exhaust over struts. Rotational direction ccw looking at rotor. Electrical connection via leads awg 24, tr 64. Stripped and tinned ends. Mass 95g.Specifications: air flow: 61m3h; 35.9Cfm. Nominal voltage: 12 v dc. Voltage range: 8...15 V dc. Noise: 23db(a). 4.0Bels. Power input: 1.2 Watt. Nominal speed: 1950 min-1. Temperature rang: -20 ... +70 Oc.
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