Noctua NF-A4x20 PWM 40x40x20

Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua's AAO frame, the NF-A4x20 is a highly optimized, premium, silent fan with a size of 40 x 20 mm. . The PWM version uses Noctua's specially designed NE-FD1 IC 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 magnificent smoothness of its operation, the SSO2 bearing and the renowned Noctua quality make it a first-rate option for the highest demands.

Compared to Noctua's award-winning NF-A4x10, the NF-A4x20 is twice as wide, allowing for increased static pressure performance and making the NF-A4x20 ideal for demanding applications with high flow resistance.

The impeller of the NF-A4x20 has flow acceleration channels on the suction side. By accelerating the airflow on the most important outer part of the blades, the flow separation on the suction side is reduced and, therefore, better efficiency and lower vortex noise are achieved.

Noctua's AAO (Advanced Acoustic Optimization) frames feature built-in anti-vibration pads, as well as step-in input design and internal surface microstructures (both proprietary to Noctua), which further refine sonic efficiency and performance. fan performance.

Noctua's step-through inlet design adds turbulence to the air inlet to facilitate the transition from laminar flow to turbulent flow, reducing inlet pitch noise, improving flow adhesion, and increasing suction capacity, especially in environments with restricted space.

With the ends of the fan blades colliding with the boundary layer created by the Inner Surface Microstructures, the flow separation from the suction side of the blades decreases significantly, resulting in noise. smaller pitch between the blades, better air flow and greater pressure efficiency.

Integrated anti-vibration pads, made of extra-soft silicone, minimize the transmission of vibrations per minute, while maintaining compatibility with all standard screws and other mounting systems.

Main features...

* 40x40x20 mm fan.
* 4-Pin PWM connection.
* Maximum speed 5000RPM.
* Low sound level, 14.9 dBA.
* Air flow: 9.4 m³/h.
* Static pressure: 2.26 mm H2O.