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Noctua NF-A6x25 PWM Quiet Computer Cooling Fan 60mm
Part #: fan-1554
15 In Stock, Ships Today Till 4pm EST  
Price: $19.99
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Product Description   Specifications    
Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua's AAO frame, the NF-A6x25 PWM is a highly optimized, premium quality quiet fan in 60x25mm size. The PWM version sports Noctua's custom designed NE-FD1 IC for fully automatic speed controlvia 4-pin fan headers and comes with a Low-Noise Adapter to reduce maximum speed during PWM control from 3000 to 2300rpm. It's superb running smoothness, SSO2 bearing and Noctua's trusted premium quality make it an elite choice for the highest demand.

Flow Acceleration Channels
The NF-A6x25 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
Thanks to its streamlined, compact motor design, the NF-A6x25's motor hub is smaller than with conventional 6cm fans. This allows for more blade surface area and thus contributes to the NF-A6x25's superior airflow and pressure performance.

AAO Frame
Noctua's AAO (Advanced Acoustic Optimization) frames feature integrated anti-vibration pads as well as Noctua's proprietary Stepped Inlet Design and Inner Surface Micro-structures, both of which further refine the fan's performance/noise efficiency.

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 Micro-structures
With the tips of the fan blades ploughing through the boundary layer created by the Inner Surface Micro-structures, 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 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.

SSO2 Bearing
The NF-A6x25 features the further optimized second generation of Noctuaís renowned, time-tested SSO bearing. With SSO2, the rear magnet is placed closer to the axis to provide even better stabilization, precision and durability.

Custom-designed PWM IC with SCD
The NF-A6x25 features the further optimized second generation of Noctuaís renowned, time-tested SSO bearing. With SSO2, the rear magnet is placed closer to the axis to provide even better stabilization, precision and durability.

Low-Noise Adaptor
The NF-A6x25 PWM is supplied with a (L.N.A.) that reduces the maximum fan speed from 3000 to 2300rpm. The L.N.A. can be used to either run the fan at a fixed speed of 2300rpm or to cap the maximum speed when using automatic PWM control.

Extensive Cabling Options
The fanís short 20cm primary cable minimizes cable clutter in typical applications while the supplied 30cm extension provides extended reach when necessary. Both cables are fully sleeved and a 4-pin y-cable allows the connection of a second NF-A6x25PWM fan to the same PWM fan header for automatic control.

Award-winning NF-A14 design

Having received more than 100 awards and recommendations from the international press, Noctuaís NF-A14 has become a proven premium choice for 140mm cooling needs. Its renowned efficiency has convinced tens of thousands of customers all over the world.
2000rpm industrialPPC version

Thanks to its elevated 2000rpm top speed, the NF-A14 industrialPPC-2000 provides a significant performance boost over the 1500rpm retail version. Combined with the industrialPPC seriesí robust polyamide construction and advanced protection features, this makes the fan ideal for challenging industrial applications.
24V version

The industrialPPC 24V Q100 models use Noctuaís NE-FD4 three-phase PWM motor driver IC. Supporting operating voltages from 6 to 30V, these models are ideal for 24V-based industrial applications and voltage- or PWM-based speed control.
Lower speed and noise levels in 12V PC environments

While the industrialPPC 24V model has been designed with 24V industrial applications in mind, it runs at a maximum speed of around 1100rpm in 12V PC environments and can be slowed down further via PWM, thus combining industrialPPC features and design with Noctuaís signature quietness.
NE-FD4 PWM IC with SCD

Supporting fully automatic PWM speed control, the fan uses Noctuaís custom-designed NE-FD4 PWM IC for 24V three-phase motors. The NE-FD4 is AEC-Q100 qualified and integrates Noctuaís proprietary Smooth Commutation Drive (SCD) technology, which suppresses PWM switching noise and thus makes the fan quieter at lower speeds.
AEC-Q100 qualification

The 24V Q100 versionís NE-FD4 motor driver IC complies with the Automotive Electronics Councilís highly rigorous AEC-Q100 failure-mechanism-based stress test qualification for integrated circuits, which makes the fan ideal for use in automotive applications.
High electrical robustness

Meeting the AEC-Q100 standardís stringent requirements for burst and surge protection, the 24V Q100 versionís high electrical robustness permits the fan to be used not only in automotive projects but also in other harsh environments with transients from electric motors and other inductive switching loads.
Inrush current suppression

The fanís voltage-stabilised inrush current suppression provides a smooth power-up and dramatically reduces power line transients that otherwise could affect other electronic components connected to the power line. This makes the fan safe to use in sensitive electronic environments.
Three-phase motor design

While most axial fans use single-phase motors with 4 slots, Noctuaís industrialPPC fans feature a three-phase design with 6 slots, which provides smoother transitions between the slots and thus allows for even higher running smoothness, further reduced vibrations and unprecedented energy efficiency.
Certified IP67 water- and dust protection

The motor and PCB of the IP67 version are completely cast in a special, highly heat conductive resin that combines thoroughgoing protection and effective motor heat dissipation. Complying with the ingress protection rating IP67, this fan is not only fully dust tight but also completely waterproof up to 1m water depth.
Fibre-glass reinforced polyamide construction

Both the impeller and the frame of Noctuaís industrialPPC fans are made entirely from fibre-glass reinforced polyamide. This material can withstand temperatures up to 140įC and makes the fans even more robust and break-proof than Noctuaís standard fibre-glass reinforced PBT fans.
Flow Acceleration Channels

The NF-A14 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.
AAO frame

Noctuaís AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctuaís proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fanís performance/noise efficiency.
Stepped Inlet Design

Noctuaís 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

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 made from extra-soft silicone minimise the transmission of minute vibrations while maintaining full compatibility with all standard screws and other mounting systems.
SSO2 Bearing

The NF-A14 industrialPPC features the further optimised second generation of Noctuaís renowned, time-tested SSO bearing. With SSO2, the rear magnet is placed closer to the axis to provide even better stabilisation, precision and durability.
Metal bearing shell

In order to guarantee the highest possible degree of manufacturing precision, minimum tolerance and excellent long-term stability, the NF-A14 industrialPPC sports a CNC milled bearing shell made entirely from brass.

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