Noctua NF-A4x10 FLX Quiet Computer Cooling Fan 40mm

Price: $13.95
  • SKUNFA4X10FLX
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Noctua NF-A4x10 FLX 40mm Fan

Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua's AAO frame, the NF-A4x10 FLX is a highly optimized, premium quality quiet fan in 40x10mm size. 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, a Low-Noise Adapter and OmniJoin Adapter Set as well as 6 years manufacturer's warranty, the NF-A4x10 is a premium choice for the highest demands.


Noctua NF-A4x10 FLX Features

Image shows Flow Acceleration Channels logo.
Flow Acceleration Channels
The NF-A4x10 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.
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Reduced Motor Hub Size
Thanks to its streamlined, compact motor design, the NF-A4x10's motor hub is smaller than with conventional 4cm fans. This allows for more blade surface area and thus contributes to the NF-A4x10's superior airflow and pressure performance.
Image shows AAO Frame logo.
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.
Image shows Stepped Inlet Design logo.
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.
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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.
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Integrated Anti-Vibration Pads
Integrated Anti-Vibration Pads made from extra-soft silicone minimize the transmission of minute vibrations while maintaining full compatibility with all standard mounting systems and fan clips used on heatsinks.
Image shows SSO2 Bearing logo.
SSO2 Bearing
The NF-A4x10 features the further optimized 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 stabilization, precision and durability.
Image shows Low-Noise Adapter logo.
Low-Noise Adapter for full flexibility
The NF-A4x10 FLX (Flexibility) is supplied with a Low-Noise Adapter (L.N.A.) that reduces the maximum fan speed from 4500 to 3700rpm so that it can be fine-tuned for superior airflow or maximum quietness.
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3 to 2-pin Adaptor and Polarity Protection
The NF-A4x10 comes with an adaptor from 3-pin Molex to the 2-pin connectors used on many graphics cards or network and storage devices. An integrated diode provides polarity protection on 2-pin connections.
Image shows OmniJoin Adaptor Set logo.
OmniJoin Adaptor Set
Many devices featuring 40mm fans use proprietary fan headers, so the NF-A4x10 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-A4x10 to proprietary fan headers!
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Extensive Cabling Options
The fan's short 20cm primary cable minimises cable clutter in typical applications while the supplied 30cm extension provides extended reach when necessary. Both cables are fully sleeved.
Image shows 6 years manufacturer’s warranty logo.
6 Years Manufacturer's Warranty
Noctua fans are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, the NF-A4x10 features an MTBF of more than 150.000 hours rating and comes with a full 6 years manufacturer's warranty.


Noctua NF-A4x10 FLX Specifications

Noctua NF-A4x10 FLX
Size 40x40x10 mm
Connector 3-pin
Bearing SSO2
Blade Geometry A-Series with Flow Acceleration Channels
Frame Technology AAO (Advanced Acoustic Optimization)
Rotational Speed (+/- 10%) 4500 RPM
Rotational Speed with L.N.A. (+/- 10%) 3700 RPM
Airflow 8.2 m³/h - 4.83 cfm
Airflow with L.N.A. 6.6 m³/h - 3.89 cfm
Acoustical Noise 17.9 dB(A)
Acoustical Noise with L.N.A. 12.9 dB(A)
Static Pressure 1.78 mm H2O
Max. Input Power 0.6 W
Max. Input Current 0.05 A
Voltage 12V
MTBF > 150,000 h
Scope of Delivery
  • Low-Noise Adapter (L.N.A.)
  • 3:2-Pin Adaptor
  • OmniJoin Adapter Set
  • 30cm Extension Cable
  • 4 Vibration-Compensators
  • 4 Fan Screws
Warranty 6 years


More Information

If you are a reseller or a system builder we offer special pricing on bulk orders of this product. Contact us at sales@quietpcusa.com or call Toll Free (877) 205-2020 for more information.