Noctua NF-A4x20 FLX Premium-quality Quiet 40mm Fan, Brown

  • Award-winning A-series design with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance
  • 40x20mm size ideal for 1U servers or replacing fans in network and storage equipment (routers, switches, NAS etc.) or other devices such as DVRs
  • 3-pin FLX version provides 5000/4400/3700rpm speed settings via Low-Noise Adaptors to fine-tune the fan for maximum airflow or near-silent operation
  • Includes anti-vibration mounts, fan screws, extension cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers

Product details

Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua's AAO frame, the NF-A4x20 is a highly optimised, premium-quality quiet fan in size 40x20mm. The FLX version provides 2000/1650/1200rpm speed settings via ...


237 reviews
Reliable little fan.
October 08, 2022
Ive been installing these fans inside Solar controllers an RV converters for a long time. Due to their high efficiency, low noise and hig...
luis2297 · Review provided by

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Fan Size40mm
Bearing TypeSSO2
Air FlowVariable

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