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Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and an AAO standard frame, the NF-A4x10 5V is a dedicated 5V version of Noctua’s highly optimised, premium quality quiet 40x10mm fan. Smooth Commutation Drive technology and Noctua’s reference class SSO2 bearing guarantee superb running smoothness and excellent long-term stability. Topped off with modular cabling, the OmniJoin™ Adaptor Set and 6 years manufacturer’s warranty, the NF-A4x10 5V is a premium choice for demanding 5V applications. 

  Being a 5V fan, the NF-A4x10 5V can not be run at 12V and will be damaged when used with typical 12V power sources such as PC mainboard fan headers.

Details
5V version

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-A4x10 5V is ideal for replacing noisy or broken 5V 40mm fans.
Flow Acceleration Channels

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.
Reduced Motor Hub Size

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.
AAO Frame

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

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

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

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.
Smooth Commutation Drive 2

Smooth Commutation Drive 2

The latest version of Noctua's advanced Smooth Commutation Drive system ensures superb running smoothness by eliminating torque variations and switching noises. This makes the NF-A4x10 remarkably quiet even at very close distances.
SSO2 Bearing

SSO2 Bearing

The NF-A4x10 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.
3 to 2-pin Adaptor and Polarity Protection

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.
OmniJoin™ Adaptor Set

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!
Extensive cabling options

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.
6-year manufacturer’s warranty

6-year manufacturer’s warranty

Noctua fans are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, the NF-A4x10 features an MTTF of more than 150.000 hours rating and comes with a full 6-year manufacturer’s warranty.
NF-A4x10 5V
FAN Specification
Size
40x40x10 mm
Mounting hole spacing
32x32 mm
Connector
3-Pin
Bearing
Blade Geometry
Rotational Speed (+/- 10%)
4500 RPM
Acoustical Noise
17,9 dB(A)
Static Pressure
1,78 mm H₂O
Max. Input Power
0,25 W
Max. Input Current
0,05 A
Voltage
5 V
MTTF
> 150.000 h
Scope of Delivery
  • 3:2 Pin Adaptor
  • OmniJoin Adaptor Set
  • 30cm Extension Cable
  • 4 Vibration-Compensators
  • 4 Fan Screws
Warranty
6 years
NF-A4x10 5V
10.05.2014 // Vortez.net
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NF-A4x10 5V Review

+ They are quiet fans.
+ They have pretty good output for being so quiet.
+ They come in resilient packaging.
+ They come with well-chosen accessories.
Test verdict: "Noctua started with really good fans, and made them better. One thing that strikes you if you handle the old fans is that they are very good fans, so it makes sense that Noctua still sells them in their redux line. But these A-Series fans are even better, and well can they join their big brothers in the A-Series lineup." (Ed Hume, Vortez.net)
03.03.2015 // PureOverclock.com
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NF-A4x10 5V Review

As always, sound levels are superb with these fans. While my opinions are subjective, what I found was after 45 dBs, that’s when I felt a fan was getting too noisy. Nothing about the Noctuas sounded too loud while testing them even at max speed, but with the plethora of LNAs and ULNAs to add to the fans, even if you didn’t have a way to control the fans it was unlikely you couldn’t tone them down to where you would be happy with them.
Test verdict: "Overall, I believe Noctua makes an excellent product. There really isn’t anything I can complain about except for the price, and even then the price is understandable. If you need good air flow, low noise and have a small form factor case that needs some better fans, I could definitely recommend what Noctua has to offer here." (Josh Jackson, PureOverclock.com)
09.02.2015 // QWERTYmag.it
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NF-A4x10 5V Review

In questa recensione ci siamo realmente resi conto di quanto Noctua sia attenta ai dettagli e alla cura dei propri prodotti anche in delle “semplici” ventole che poi, in questo caso specifico, semplici non sono visto l’elevata cura nella produzione e nelle tecnologie adottate. Ci ha stupito moltissimo il fatto di ritrovare tutte le tecnologie citate nell’introduzione anche nelle ventole di dimensione ridotta come le NF-A4. Siamo decisamente soddisfatti sia dalle prestazioni in termini di efficienza/rumore, sia dal bundle che dai prezzi decisamente in linea con quelli di altri produttori ma assolutamente superiori in termini di caratteristiche e prestazioni. Attribuiamo a tutta la NF-A Series il premio Gold Award per l’innovazione tecnologica e la cura dei particolari che L’azienda ha dimostrato in questa serie di ventole super-efficienti.
Test verdict: "Ventole per ogni tipo di esigenza. Noctua con la serie NF-A ha pensato proprio a tutti e a tutto proponendo prodotti di altissima qualità e tecnologia mantenendo un ottimo rapporto qualità/prezzo. Decisamente apprezzata la cura dei dettagli e del bundle che rendoni queste ventole il TOP DI GAMMA sul mercato." (Davide Torno, QWERTYmag.it)
07.01.2015 // Neoseeker.com
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NF-A4x10 5V Review

After studying the Noctua A-series Premium fans for the last few weeks, I have begun to understand how each design feature performs their function. As noted in the following paragraphs, each feature adds to the overall function of noise reduction, therefore improving air flow and performance efficiency. The Noctua Advanced Acoustic Optimization Frame has anti-vibration pads in each mounting flange corner. This feature not only reduces vibration noise transferring from the fan, but also into the fan from wobbly case components. The Stepped Inlet Design on the fan case edge turns the air flow from laminar to turbulent, reducing the tonal intake noise. The Inner Surface Microstructures next cause a boundary layer to reduce suction side flow separation as the fan blade tips pass, reducing the blade passing noise with improved air flow. The Flow Acceleration Channels on the fan blades cause the outer blade region air flow to speed up, reducing vortex noise of the fan blades while improving efficiency. Moving the magnet of the Noctua renowned SSO Bearing closer to the axis of the bearing improves stabilization, precision and durability. All of these features and more are packaged with many accessories for each fan, plus Noctua provides a 6 year warranty.
Test verdict: "Noctua A-series Premium fans are looking like the right choice for your new or replacement case fan." (Marvin Purdy, Neoseeker.com)
14.11.2014 // Modders-Inc.com
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NF-A4x10 5V Review

Aside from the lower temperature, the A9 fans have a more “spread out” sound signature even though it is running at a higher RPM and has lesser high pitched noises across various speeds. The extra padded corners also help in giving extra space when positioned in a “pull” position minimizing noise. The smaller form factors and compact builds are much more common now than ever before with many users opting to build desktops that can be portable for LAN parties or for discreet integration in their living room as an HTPC. The A9 and A8 series fans fit these application well with excellent performance and low noise profiles that is even more flexible if need be. For storage or, spot cooling or component cooling in even tighter spaces, the A4 series offers a rare and impressive feature set that is above what most people would expect from something this small.
Test verdict: "These A-series fans also enjoy the same set of low noise features and premium build quality that the other Noctua fan series provides, including the impressive 6-year warranty and extensive accessory package." (Ron Perillo, Modders-Inc.com)
22.10.2014 // El Chapuzas Informático
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NF-A4x10 5V Review

Como podemos comprobar, los modelos de 80 y 92 mm son completamente silenciosos, pero el modelo de 40 mm es algo ruidoso como cabe esperar para sus 4500 RPM máximas. Es curioso además ver el gran flujo de aire que ofrece el modelo A4, pues es capaz de moverse solo con gran facilidad.
Test verdict: "Los ventiladores Noctua NF-A4/A8/A9 demuestran una vez más el buen hacer de Noctua, pues ofrecen un gran rendimiento con una sonoridad mínima. Además, llegan acompañados de un excelente kit de accesorios, algo de lo que pocas marcas pueden presumir." (Iván Martínez, El Chapuzas Informático)
11.05.2014 // Hardware-360
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NF-A4x10 5V Review

Stock performance shows a 3 degree drop with the A9 fans on heatsink use and up to 2 degrees under FPU only loads. Noise performance is superior in the NF-A9, despite the higher RPM with a smoother PWM operation and lesser high pitched noises across various speeds. The extra padded corners also help in giving extra space when positioned in a pull position minimizing noise. Ultimately each fan size has its own application depending on the chassis or heatsink applied to, although the smaller A4 5V fan is more suitable for storage cooling but will not look out of place as a chipset or spot cooler as well, especially the 12V version for added flexibility. The 92mm and 80mm A9 and A8 have a very balanced performance as both heatsink fans or case fans with their wide fan blade and excellent static pressure performance. The further lowered noise compared to the B9 and R8 series is a welcome change because the original fans were not particularly troublesome at all when it came to noise either. The integrated padded corners also work very well for noise dampening, especially when positioned as a “pull” fan since there is an added space that minimizes high pitched noises typically present in high-RPM performance fans when placed in this position.
Test verdict: "As with all Noctua fans, they come with premium pricing as they come in premium packaging and feature set so they are not easily affordable. The good thing is that the 6-year warranty found on larger Noctua fans also apply to the A9, A8 and A4 series, as well as the premium accessories that come out of the box." (Ron Perillo, Hardware-360)
08.11.2015 // AndroidPC.es
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NF-A4x10 5V Review

Después de probar los modelos NF-A6x25 PWM, NF-A6x25 FLX, NF-A4x10 FLX y NF-A4x10 5V nos dan ganas de dejar un ventilador en nuestras placas pasivas, pero preferimos no hacerlo, como ya sabéis nos gustan los sistemas pasivos. Ciertamente es estos productos pueden ofrecen una mejora térmica en nuestros dispositivos si vamos a exprimirlos y además no nos molestan con ruidos. Si tenemos algún modelo pasivo con problemas térmicos añadirle un pequeño ventilador bien dimensionado siempre es una solución, sobretodo si tienen la calidad de estos modelos.
Test verdict: "Los recomendamos sin ninguna duda para quien quiera mejorar el rendimiento de su miniPC o AndroidPC con problemas térmicos." (Joaquin Prida Trujillo, AndroidPC.es)
26.06.2015 // TugaReviews.com
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NF-A4x10 5V Review

Como é habitual a Noctua apresentou-nos excelentes ventoinhas para qualquer tipo de configuração, desde da qualidade de construção até a performance e não esquecendo os acessórios que completam este produto, as ventoinhas Noctua são algo que os entusiastas e até o utilizador comum devem ter em pensamento quando quiserem qualidade e performance até ao ultimo milímetro. Juntando toda a nova tecnologia, a Noctua obteve excelentes resultados e isso está a olhos vistos, a marca é conhecida por ser eximia nos seus produtos, e podemos comprovar isso ao testar estas excelentes ventoinhas.
Test verdict: "Para finalizar só me resta dar a pontuação que estes excelentes produtos merecem, mais uma vez, a Noctua arrecada mais uma vez o ouro devido a sua excelente qualidade e eficácia." (Napoleão Silva, TugaReviews.com)
10.05.2015 // PC Ekspert
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NF-A4x10 5V Review

Kvaliteta materijala i izrade je nešto na što Noctua posebno pazi a to se odrazilo i na ove nove modele. Performanse svih modela su u skladu s onime što deklarira proizvođač i kod Noctue se dobiva točno ono što se i plaća. PWM hladnjaci su po običaju na maksimalnom broju okretaja malo čujniji, no performanse se ne gube nimalo uz upotrebu L.N. adaptera pri čemu se buka ipak dosta smanji.
Test verdict: "Sve u svemu, Noctua uspješno nadograđuje svoj lineup i kupci će kao i uvijek biti vrlo zadovoljni." (Krešimir Matanović, PC Ekspert)

Installation Manual (PDF)

Information Sheet (PDF)

Can I use Noctua fans in my system from Acer, Apple, Dell, HP, Lenovo or other major brands?

Noctua 12V fans comply with the established specifications for standard PC systems issued by Intel and AMD. Systems from Acer, Apple, Dell, HP, Lenovo or other major brands often deviate from these specifications e.g. by using proprietary fan headers, custom pin-alignments or pin-configurations, different methods of fan speed control, etc. This can lead to compatibility issues when using Noctua fans in systems from said brands. Some of these problems can be avoided with some technical knowledge, but especially BIOS related issues (e.g. errors or shutdowns due to low fan speed) can often not be resolved. As a result, Noctua does not officially support systems from Acer, Apple, Dell, HP, Lenovo or other major brands.

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