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Dotado de medidas avanzadas de diseño aerodinámico, como canales de aceleración de flujo (Flow Acceleration Channels) y el marco AAO, el NF-A6x25 5V PWM es una variante PWM de 5V del ventilador silencioso, de primera calidad y altamente optimizado de 60 x 25 mm de Noctua. El personalizado NE-FD1 PWM IC, que integra la tecnología Smooth Commutation Drive y los rodamiento SSO2 de referencia de Noctua garantizan una fluidez de funcionamiento espectacular y una excelente estabilidad a largo plazo. Gracias a que está dotado de cables modulares, del conjunto de adaptador OmniJoin™, así como de 6 años de garantía del fabricante, el NF-A6x25 5V PWM es la mejor elección para las aplicaciones de 5V más solicitadas que necesiten control PWM.
Al ser un ventilador de 5V, el NF-6x25 5V PWM no puede utilizarse a 12V, por lo que se dañará si se utiliza una fuente de alimentación de 12 V como los conectores de los ventiladores de la placa base de los PC.
Detalles
Versión de 5V PWM

Versión de 5V PWM

Muchos dispositivos, como las soluciones de red y almacenamiento, utilizan ventiladores de 60 mm de 5 voltios con control de velocidad PWM. Con el mismo voltaje de funcionamiento, soporte PWM e incluyendo el conjunto de adaptador OmniJoin™, que lo hace compatible con conectores del ventilador propios, el NF-A6x25 5V PWM es ideal para reemplazar los ventiladores de 60 mm de 5V con PWM que hagan ruido o que estén estropeados.
Protección contra polaridad

Protección contra polaridad

Debido a que muchos dispositivos que utilizan ventiladores de 5V están dotados de conectores propios y documentación sobre la alineación de pines que no siempre está disponible, el NF-A6x25 5V cuenta con un diodo integrado para la protección contra la polaridad. De este modo usted siempre estará seguro, incluso si accidentalmente conecta el ventilador con la polaridad invertida.
Tamaño reducido del cubo del motor

Tamaño reducido del cubo del motor

Gracias a su diseño simplificado y compacto del motor, el cubo del motor del NF-A6x25 es más pequeño que el de los ventiladores convencionales de 6 cm. Esto hace posible una superficie de aspas mayor y, por tanto, contribuye al mayor flujo de aire y rendimiento de presión del ventilador.
Canales de aceleración del flujo

Canales de aceleración del flujo

El impulsor del NF-A6x25 cuenta con canales de aceleración del flujo en el lado de succión. Al acelerar el flujo de aire en la parte exterior de las aspas más importante, se reduce la separación del flujo en el lado de succión y, por tanto, se consigue una mejor eficiencia y menor ruido de vórtice.
Marco AAO

Marco AAO

Los marcos AAO (optimización acústica avanzada) de Noctua cuentan con almohadillas antivibración integradas, así como con el diseño de entrada paso a paso y las microestructuras de superficie internas (ambos propiedad de Noctua), que perfeccionan aún más la eficiencia sonora y el rendimiento del ventilador.
Diseño de entrada paso a paso

Diseño de entrada paso a paso

El diseño de entrada paso a paso de Noctua añade turbulencia a la entrada de aire para facilitar la transición de flujo laminar a flujo turbulento, lo que reduce el ruido de entrada tonal, mejora la adjunción de flujo e incrementa la capacidad de succión, especialmente en entornos con espacio restringido.
Microestructuras de superficie interna

Microestructuras de superficie interna

Con los extremos de las aspas del ventilador en colisión con la capa límite creada por las Inner Surface Microstructures (microestructuras de superficie interna), la separación del flujo desde el lado de succión de las aspas mengua de forma significativa, lo que resulta en un ruido de paso entre las aspas menor, mejor flujo de aire y mayor eficiencia de presión.
Almohadillas antivibración integradas

Almohadillas antivibración integradas

Las almohadillas antivibración integradas, fabricadas en silicona extrasuave, minimizan la transmisión de las vibraciones por minuto, a la vez que mantienen la compatibilidad con todos los tornillos estándar y otros sistemas de montaje.
PWM IC de diseño propio con SCD (Unidad de Conmutación Suave)

PWM IC de diseño propio con SCD (Unidad de Conmutación Suave)

Con soporte total para un control de velocidad PWM automático, el ventilador usa el nuevo NE-FD3 5V PWM IC de diseño propio de Noctua que se integra con la tecnología Smooth Commutation Drive (SCD, Unidad de Conmutación Suave). Proporcionando impulsos de par más suaves, el SCD disminuye los ruidos de cambios del PWM y hace que el ventilador funcione de forma más silenciosa a velocidades bajas.
Rodamientos SSO2

Rodamientos SSO2

El NF-A6x25 cuenta con la segunda generación, aún más optimizada, de los renombrados rodamientos SSO de Noctua, de eficacia probada. Con SSO2, el imán trasero se coloca más cerca del eje para proporcionar mejor estabilización, precisión y durabilidad.
Conjunto de adaptador OmniJoin

Conjunto de adaptador OmniJoin

Muchos dispositivos dotados de ventiladores de 60 mm utilizan conectores de ventilador propietarios, por lo que el NF-A6x25 5V PWM incluye un conjunto adaptador OmniJoin de Noctua. Solo ha de cortar el cable original del ventilador, fijarlo al adaptador mediante los conectores 3M Scotchlok™ incluidos, y podrá conectar el NF-A6x25 5V PWM a los conectores propietarios del ventilador.
6 años de garantía del fabricante

6 años de garantía del fabricante

Los ventiladores de Noctua son reconocidos por su impecable calidad y destacada longevidad. Al igual que todos los demás ventiladores Noctua, el NF-A6x25 ofrece un tiempo medio de vida entre fallos (MTBF) de más de 150 000 horas y viene con una garantía total del fabricante de 6 años.
NF-A6x25 5V PWM
General
Notes and warnings
Al ser un ventilador de 5V, el NF-6x25 5V PWM no puede utilizarse a 12V, por lo que se dañará si se utiliza una fuente de alimentación de 12 V como los conectores de los ventiladores de la placa base de los PC.
Especificaciones ventilador
Dimensiones
60x60x25 mm
Espacio entre orificios de montaje
50x50 mm
Conexión
4 pines
Rodamiento
Geometría de las aspas
Tecnología del marco
Velocidad de rotación (+/-10%)
3000 RPM
Velocidad de rotación min. (PWM, +/-20%)
650 RPM
Sonoridad
19,3 dB(A)
Presión estático
2,18 mm H₂O
Potencia max.
1,3 W
Amperaje max.
0,26 A
Voltaje
6 años V
MTTF
> 150.000 h
Volumen de entrega
Garantía
6 años
NF-A6x25 5V PWM
A-Series fans
03.08.2016 // GreenTechReviews.ru
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NF-A6x25 5V PWM Opinión

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.
Resultado del análisis: "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 Opinión

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.
Resultado del análisis: "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)

Manual de instalación (PDF)

Hoja de datos (PDF)

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.

What pin configuration do Noctua 5V fans use?

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

5v pin configuration

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 big is the NH-D15S and how much clearance does it provide for RAM and mainboard heatsinks? Copy

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

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 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

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.

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.

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 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.

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 switches, routers or other network devices?

Noctua fans such as the 40, 60, 80 or 92mm NF-A series models are ideal for replacing noisy stock fans in switches, routers and other network devices in order to make them quieter and thousands of users have managed to significantly reduce the noise levels of their 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 network device before purchasing a Noctua fan for this purpose. Some of the common issues that can occur when replacing pre-installed fans are:

  • Different pin assignment: Whereas Noctua fans use the standardised pin assignment for PC fans (see this FAQ for details), some network devices use different assignments. For example, some devices have the power and GND or rpm and PWM pins swapped. Therefore please carefully verify that your 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 network devices 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 device uses the same pin functions.
  • Firmware speed control: Some network 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 network 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 device to display errors or even shut down because it suspects a fan failure.
  • Different power draw: Some network 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 network device 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. 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 fans 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 pre-installed fans in network devices. Please note that since there are so many different devices 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 pre-installed fans. Please contact your network device manufacturer for any questions regarding aspects such as the device’s pin alignment or fan monitoring and control.

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