Endowed with advanced aerodynamic design measures, such as Flow Acceleration Channels and the Noctua AAO frame, the NF-A4x20 is a silent fan, top quality and highly optimized, with a size of 40 x 20 mm .
The PWM version uses the NE-FD1 IC specially designed by Noctua for fully automatic speed control via 4-pin fan connectors and is provided with a Noise Reduction Adapter that reduces the maximum speed from 5000 to 4400 rpm during control PWM The superb smoothness in its operation, the SSO2 bearing and the renowned Noctua quality make it a first-order option for the highest demands.
Dimensions 40x40x20 mm
Space between mounting holes 32x32 mm
4-Pin PWM connection
Series A blade geometry with flow acceleration channels