Noctua NF-A4x20 5V Lüfter 40mm

Art-Nr.: 90706536
, Manufacturer's no.: NF-A4x20 5V
  • 40x40 mm, 20mm Einbautiefe
  • Drehzahlbereich: max. 5000 rpm
  • max. ~ 6 cfm (10.2 m³/h) @ 14.9 dB
  • Farbe: beige / braun
  • Vibrationsdämpfer
In the product range since: August 2017

Shortcut to the most important info:

16.80
incl. 25% VAT
Available at short notice
4-6 days delivery time
plus Shipping
Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua’s AAO frame, the NF-A4x20 5V is a dedicated 5V version of Noctua’s highly optimised, premium quality quiet 40x20mm fan. Smooth Commutation Drive technology and Noctua’s reference class SSO2 bearings guarantee superb running smoothness and excellent long-term stability. Topped off with modular cabling and the OmniJoin™ Adaptor Set, the NF-A4x20 5V is a premium choice for demanding 5V applications.

40x20mm size

Compared to Noctua’s award-winning NF-A4x10, the NF-A4x20 is twice as thick, which allows for increased static pressure performance and makes the NF-A4x20 ideal for demanding applications with high flow resistance.

5V version

Many devices such as network or storage solutions use 5-volt 40mm fans. With the same operating voltage and the included OmniJoin™ Adaptor Set that makes it compatible with proprietary fan headers, the NF-A4x20 5V is ideal for replacing noisy or broken 5V 40mm fans.

Polarity protection

As many devices using 5V fans feature proprietary connectors and documentation of the pin alignment may not be available, the fan features an integrated diode for polarity protection. This way, you're on the safe side if you accidentally connect it with reverse polarity.

Flow Acceleration Channels

The NF-A4x20 impeller features suction side Flow Acceleration Channels. By speeding up the airflow at the crucial outer blade regions, this measure reduces suction side flow separation and thus leads to better efficiency and lower vortex noise.

AAO frame

Noctua's AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctua's proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fan's performance/noise efficiency.

Stepped Inlet Design

Noctua's Stepped Inlet Design adds turbulence to the influx in order to facilitate the transition from laminar flow to turbulent flow, which reduces tonal intake noise, improves flow attachment and increases suction capacity, especially in space-restricted environments.

Inner Surface Microstructures

With the tips of the fan blades ploughing through the boundary layer created by the Inner Surface Microstructures, flow separation from the suction side of the blades is significantly suppressed, which results in reduced blade passing noise and improved airflow and pressure efficiency.

Integrated Anti-Vibration Pads

Integrated Anti-Vibration Pads made from extra-soft silicone minimise the transmission of minute vibrations while maintaining full compatibility with all standard mounting systems and fan clips used on heatsinks.

OmniJoin™ adaptor set

Many devices featuring 40mm fans use proprietary fan headers, so the NF-A4x20 comes with Noctua's OmniJoin™ adaptor set. Just cut the original fan's cable, fix it to the adaptor using the supplied 3M Scotchlok™ connectors and you can plug the NF-A4x20 to proprietary fan headers!

SSO2 bearing

The NF-A4x20 features the further optimised second generation of Noctua's renowned, time-tested SSO bearing. With SSO2, the rear magnet is placed closer to the axis to provide even better stabilisation, precision and durability.

Any described warranty is supplied by the manufacturer of this article and is provided at least in germany. The full warranty information, including the coverage and requirements to claim the warranty is detailed on the manufacturers website. You can find a link to this site on our brand overview. You can find more information about warranties in our FAQ.