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Bénéficiant d’une conception aérodynamique avancée incluant les Flow Acceleration Channels et le cadre AAO Noctua, le NF-A6x25 5V PWM est une déclinaison 5v compatible PWM du fameux ventilateur silencieux haut de gamme et hautement optimisé 60x25mm. Le circuit propriétaire NE-FD1 PWM IC qui intègre la technologie Smooth Commutation Drive associé au roulement de référence Noctua SSO2 garantissent un fonctionnement souple ainsi qu’une excellente stabilité sur le long terme. Complété d’un câblage modulaire, du kit OmniJoin™ Adaptor Set et bénéficiant d’une garantie fabricant de 6 ans, le NF-A6x25 5V PWM s’impose comme la solution premium idéale pour les applications 5v nécessitant un contrôle PWM.
S’agissant d’un ventilateur 5v, le NF-6x25 5V PWM ne peut fonctionner sous une tension de 12v et toute utilisation avec une source de courant 12v (c’est par exemple le cas des connecteurs de ventilation présents sur les cartes mères pour PC) détériorera le ventilateur.
Détails
Version 5V PWM

Version 5V PWM

De nombreux appareils, tels que ceux dédiés au stockage ou à la gestion de réseaux, intègrent des ventilateurs 60mm fonctionnant sous 5 volts et pilotés par un système PWM. Parce qu’il fonctionne sous une telle tension, qu’il est compatible PWM et qu’il est livré avec un kit d’adaptation OmniJoin™ lui permettant de se greffer à des connecteurs propriétaires, le NF-A6x25 5V PWM constitue la solution de remplacement parfaite pour les ventilateurs 60mm 5v bruyants ou défectueux.
Protection à l’inversion de polarité

Protection à l’inversion de polarité

De nombreux appareils pourvus de ventilateurs 5V utilisent des connecteurs propriétaires. Sachant que le sens de connexion n’est pas toujours précisé dans les documents techniques, le NF-A6x25 5V est équipé d’une diode de protection à l’inversion de polarité. Vous êtes ainsi prémuni de tout incident en cas de branchement inversé accidentel.
Moyeux de taille réduite

Moyeux de taille réduite

Grâce à une conception plus profilée et compacte du moteur, le moyeu du NF-A6x25 est de taille plus réduite comparée à celle des ventilateurs 6cm traditionnels. En augmentant de fait la surface des pales, le NF-A6x25 améliore significativement le niveau de pression ainsi que le flux.
Canalisateurs de flux (Flow Acceleration Channels)

Canalisateurs de flux (Flow Acceleration Channels)

La turbine du NF-A6x25 est munie de canalisateurs de flux sur la face succion du ventilateur. L'accélération du flux générée aux extrémités des pales permet de créer une succion plus massive, moins dispersée, et accroit ainsi l'efficacité tout en réduisant les perturbations sonores liées aux vortex.
Cadre AAO

Cadre AAO

Les cadres AAO (Advanced Acoustic Optimisation) de Noctua sont équipés de silentblocs anti-vibrations et bénéficie d'optimisations exclusives permettant de repousser encore plus loin les limites de la performance et du silence : Stepped Inlet Design and Inner Surface Microstructures.
Conception en escalier de l'admission

Conception en escalier de l'admission

La conception en escalier de l'admission de Noctua ajoute une turbulence au flux entrant permettant ainsi un passage progressif d'un flux laminaire à un flux turbulent. Ce phénomène réduit les émissions sonores initiales, améliore la cohésion du flux et augmente la capacité de succion en particulier dans les environnements où l'espace fait défaut.
Conduit de contournement à microstructures

Conduit de contournement à microstructures

Les extrémités des pales évoluant à proximité de la surface intérieure du conduit (caractérisée par la présence d'une microstructure), la séparation des flux qui s'opère au niveau de la succion est quasi inexistante. Cette optimisation permet de réduire les émissions sonores liées au mouvement des pales, améliore le flux d'air ainsi que le niveau de pression.
Silentblocs anti-vibrations intégrés

Silentblocs anti-vibrations intégrés

Les silentblocs anti-vibrations intégrés, fabriqués à partir de silicone extra-souple, permettent de limiter la transmission des vibrations minute tout en assurant une parfaite compatibilité avec les vis et systèmes de fixations standards.
Système exclusif PWM IC avec SCD

Système exclusif PWM IC avec SCD

Compatible avec les systèmes de contrôle de vitesse automatisé PWM, le ventilateur est pourvu du tout dernier circuit NE-FD1 5V PWM IC qui intègre la technologie SCD (Smooth Commutation Drive). En générant des impulsions de couple moins brutales, le SCD élimine les nuisances sonores liées aux commutations du PWM pour une ventilation moins bruyante à vitesse réduite.
Roulement SSO2

Roulement SSO2

Le NF-A6x25 se voit doté de la célèbre référence du roulement Noctua : le SSO. Il s'agit ici de la toute nouvelle génération, encore plus optimisée. Le SSO2 est en effet équipé d'un aimant arrière plus proche de l'axe pour une meilleure précision, longévité et stabilité.
Kit d'adaptation OmniJoin

Kit d'adaptation OmniJoin

Compte tenu du fait que de nombreux produits équipés de ventilateurs 60mm sont pourvus de connecteurs spécifiques pour les raccorder, le NF-NF-A6x25 5V PWM est livré avec un kit d'adaptation OmniJoin. Il vous suffit de couper le câble de votre ventilateur d'origine, de le raccorder à l'adaptateur en utilisant les connecteurs Scotchlok 3M™ founis. Vous pouvez alors brancher votre NF-NF-A6x25 5V PWM au connecteur propriétaire dédié à la ventilation.
Garantie Constructeur de 6 ans

Garantie Constructeur de 6 ans

Les ventilateurs Noctua sont connus pour leur qualité irréprochable et leur étonnante longévité. Comme tous les ventilateurs de la marque, le NF-A6x25 affiche un MTTF de plus de 150 000 heures de test et se voit assorti d'une garantie constructeur de 6 ans.
NF-A6x25 5V PWM
Général
Notes and warnings
S’agissant d’un ventilateur 5v, le NF-6x25 5V PWM ne peut fonctionner sous une tension de 12v et toute utilisation avec une source de courant 12v (c’est par exemple le cas des connecteurs de ventilation présents sur les cartes mères pour PC) détériorera le ventilateur.
Spécifications ventilateur
Dimensions
60x60x25 mm
Espacement des orifices de fixation
50x50 mm
Branchement
4-Pin PWM
Type roulements
Géométrie des pales
Série A avec canalisateurs de flux
Vitesse de rotation (+/-10%)
3000 RPM
Vitesse de rotation min. (PWM, +/-20%)
650 RPM
Niveau sonore
19,3 dB(A)
Pression statique
2,18 mm H₂O
Puissance consommée max.
1,3 W
Ampérage max.
0,26 A
Tension
5 V
MTTF
> 150.000 h
Volume de livraison
Garantie
6 ans
NF-A6x25 5V PWM
A-Series fans
03.08.2016 // GreenTechReviews.ru
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NF-A6x25 5V PWM test

Обязательно отметим, что при довольно небольшом проигрыше вентилятору от Delta, уровень шума от новинок Noctua разительно отличается — их очень слабо слышно, в то время как детище Delta чрезвычайно громкое.
Verdict du test: "Новый вентилятор Noctua NF-A6x25 5V PWM продемонстрировал отличную эффективность при сниженном энергопотреблении и низком уровне шума, обладая ещё и возможностью снижать скорость работы. Команда из Австрии не только применила все свои предыдущие наработки, но и усовершенствовала вентилятор в плане питания — ему достаточно лишь 5 В!" Владимир Солонин, GreenTechReviews.ru)
27.07.2016 // Overclockers.com
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NF-A6x25 5V PWM test

The NF-A6x25 5V fans came with a variety of features that you normally see only on full-sized. Noctua did not stint with these, despite their diminutive dimensions. The frame “micro-structures” in particular were cute. With these little things in your hands, you have to marvel at how they made things like stepped inlets and cushioned screw holes on frames this small. The fans also come with a variety of accessories that will allow you to adapt them to the various situations you might meet.
Verdict du test: "These are cute little fans. You will probably would not have found a place for them in your computer system a few years ago, but with small form factors coming on you may need something this small. Certainly some pre-made computers from major manufacturers feature fans this small in their PSU’s. But network equipment may use a cooling fan of this size. The fans that come with the equipment may fail. Or they may be very noisy. You may wish to replace the fans that came with the equipment with quiet fans. These are quiet fans. (Ed Humes, overclockers.com)

Instructions de montage (PDF)

Feuille d'informations (PDF)

I get a CPU fan error despite the fan is running!

Some mainboards display a CPU fan error when the fan speed falls below a certain threshold, e.g. 900rpm. If you want to run the fan below this speed (e.g. using the supplied U.L.N.A.), please adjust the threshold in the BIOS or disable CPU fan error warning.

Can I paint my Noctua fan in order to change its color?

Since even small variations in the layer of paint can lead to an imbalance of the impeller, resulting in vibrations, higher noise levels, increased stress on the bearing and thus reduced lifespan, we do not recommend painting the fan. Please note that for the reasons stated above, painting the fan will void your warranty.

How can I find out the direction of airflow and sense of rotation?

When looking at the fan so that the circular sticker with the Noctua logo is facing you, the direction of airflow is towards you and the sense of rotation is clockwise:

P14

You specify airflow in m³/h, how can I convert to CFM?

In accordance to the International System of Units (SI system), Noctua specifies volumetric flow rate (airflow) using the SI unit of cubic metres per hour (m³/h). The SI unit can easily be converted to cubic feet per minute (CFM): One m³/h is ~0.589 CFM and one CFM is ~1.699 m³/h. For convenient conversion, online tools such as www.convertunits.com can be used.

Can I register my Noctua product?

Striving for excellence in both product and service quality, we believe that warranty and support should not depend on the customers willingness to provide his data throughout a registration process. We therefore do not offer the possibility to register Noctua products and provide the same 6-year manufacturer’s warranty and the same excellent level of support for all products.

How should I clean my Noctua fan?

Fans inside computer cases tend to accumulate dust over longer periods of usage. In order to maintain maximum performance, please clean your fans regularly using a duster, slightly moist tissue or canned air. Please be careful not to use too much force in order to prevent any damage to the fan. Please do not use a vacuum cleaner as this may apply excessive force to the fan and do not put the fan under running water as water residues inside the motor may lead to short circuits.
In order to ensure flawless operation over many years of usage, Noctua’s premium grade SSO bearings are fully sealed to prevent the entering of fine dust particles. Please note that the fan is not designed to be taken apart by the user. Removing the impeller from the frame will break the sealing of the bearing and results in a loss of warranty.

Can I disassemble my fan for cleaning (or other purposes, e.g. painting)?

In order to ensure flawless operation over many years of usage, all Noctua fans come with a premium grade SSO bearing, which is fully sealed to prevent the entering of fine dust particles. Please note that the fan is not designed to be taken apart by the user. Removing the impeller from the frame will break the sealing of the bearing and results in a loss of warranty.

It is thus recommended to clean your fans using a duster, slightly moist tissue or canned air. Please be careful not to use too much force in order to prevent any damage to the fan. Please don’t use a vacuum cleaner as this may apply excessive force to the fan.

Can I run 4-pin PWM fans on 3-pin fan headers?

PWM fans come with a 4-pin connectors for fully automatic speed control via your mainboard’s 4-pin PWM fan headers. Please note that 4-pin fans can also be connected to your mainboard’s 3-pin fan headers though. When connected to 3-pin fan headers, the fan will run at full speed (unless the mainboard supports voltage based speed control).

How can I check if my 4-pin fan header supports PWM?

Some mainboards feature 4-pin fan headers that actually don‘t use a PWM signal on Pin 4 to control the fan speed but rather reduce the voltage on Pin 2 (like a standard 3-pin fan header). As the fan speed at minimum voltage is usually higher than the speed at 20% PWM duty cycle, the fan can not reach as low minimum speeds under voltage control as under PWM control. Please refer to your mainboard manual to check whether or not your mainboard has 4-pin fan headers that control the fan speed by reducing voltage on Pin 2 rather than by changing the PWM duty cycle on Pin 4:

4 pin fan header types

Note that mainboard manufacturers use different terms to indicate that Pin 4 is not being used for PWM control (e.g. “+5V”, “VCC” or “NC”), but if one of these terms is used, you can be sure that the fan header does not support PWM. If Pin 4 is described as “Speed Control” or “PWM” or the like, you can be sure that the fan header supports PWM.

Unfortunately, the description of Pin 2 is not always a clear indication as some manufacturers use terms such as “Fan PWR” or “Power” for both types of fan headers. However, if Pin 2 is described as “Speed Control”, you can also be sure that the fan header does not support PWM based speed control. If Pin 2 is described as “+12V”, this is a clear indication that the fan header supports PWM.

Please also note that in some cases, the descriptions of the pin layouts in the mainboard manuals may not be correct and some models actually allow you to switch the fan headers from voltage control mode to PWM control mode in the BIOS even though the pin descriptions do not indicate PWM support. We thus recommend to look for these options in the BIOS before taking other measures. In case of doubt, please contact your mainboard manufacturer.


If your mainboard features other 4-pin fan headers that use PWM for speed control, you can run multiple fans from these headers using Y-split cables. Make sure not to exceed the specified maximum power draw of the fan headers (usually 10-12W) though.

What pin configuration do Noctua 5V fans use?

The pin configuration of Noctua 5V fans is identical to 12V fans:

5v pin configuration

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.

Can Noctua fans be used to replace noisy stock fans in NAS devices?

Noctua fans such as the 40, 60, 80 or 92mm NF-A series models are ideal for replacing noisy stock fans in NAS devices in order to make them quieter and thousands of users have managed to significantly reduce the noise levels of their NAS units this way. However, while it is easy and straightforward to replace the fans in some cases, it can be very difficult in others, so Noctua strongly recommends that users carefully research if it is possible to easily replace the fan(s) of their NAS device before purchasing a Noctua fan for this purpose. Some of the common issues that can occur when replacing NAS fans are:

  • Different pin assignment: Whereas Noctua fans use the standardised pin assignment for PC fans (see this FAQ for details), some NAS units use different assignments. For example, some devices have the power and GND or rpm and PWM pins swapped. Therefore please carefully verify that your NAS device uses the same pin assignment as standard fans. Experienced users may also change the pin assignment by cutting and resoldering the fan cables, but please note that this will void your Noctua manufacturer’s warranty.
  • Different pin functions: Noctua fans use the standardised pin functions for PC fans (see this FAQ for details); however, some NAS units use fans where certain pins serve a different function. For example, some devices use the RPM pin for “power good” signals. Therefore please carefully verify that your NAS device uses the same pin functions.
  • Firmware speed control: Some NAS devices demand a certain maximum or minimum fan speed. If the new fan doesn’t have the same or similar maximum or minimum speed, the device may display errors or even shut down.
  • Different starting voltage: Most NAS devices use voltage-based speed control. If the new fan has a higher starting voltage than the original fan, it may not start up right away. This may lead the NAS device to display errors or even shut down because it suspects a fan failure.
  • Different power draw: Some NAS devices monitor the fan’s power draw. If the new fan has a lower power consumption than the stock fan, the device might display errors or even shut down.

Please note that most NAS manufacturers don’t provide detailed documentation regarding fan compatibility and control, so users who want to replace the fans of their devices usually have to rely on “How to” guides, blog and forum posts or video tutorials. For example, there are excellent video tutorials available for changing the fans in popular Synology NAS models (DS416j, DS1515+ and DS1812+ in English, DS416/DS415/DS916/DS216/DS214 and DS1515+ in German). Please also note that fan compatibility and control can vary from model to model and even from revision to revision even if the devices stem from the same manufacturer. As a result, it is important to make sure that the information or guidelines you rely on when replacing your NAS fan are applicable to your specific model as well as your specific hardware and firmware revision.

Due to the possible issues listed above, Noctua recommends that only experienced users attempt to replace their NAS fans. Please note that since there are so many different NAS models and most of them lack documentation for aspects such as fan compatibility and control, Noctua customer support cannot assist you with compatibility issues when replacing NAS fans. Please contact your NAS manufacturer for any questions regarding aspects such as the device’s pin alignment or fan monitoring and control.

Which Noctua fan or CPU cooler should I buy? How to choose the right model?

Not sure which Noctua product to buy? Our detailed buying guides for fans and CPU coolers help you to choose the model that works best for you.

Can I use Low-Noise Adaptors with y-cables / multiple fans?

Yes, Low-Noise Adaptors (L.N.A.s) can be used with y-cables, but please make sure to use one L.N.A. per fan and to place the L.N.A.s between the y-cable and the fans as shown below. Never use one L.N.A. for two (or more fans) by placing it between the mainboard and the y-cable!

D15S

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