Noctua NF-A12x25-PWM 120x120 cm fan

The NF-A12x25 is a highly optimized next-generation 120mm fan that, thanks to innovative aerodynamic design measures, sets new records in terms of silent cooling performance. It combines trend-setting Noctua technologies such as the AAO (Advanced Acoustic Optimization) frame or Flow Acceleration Channels with an unprecedentedly narrow impeller gap of just 0.5mm. The manufacturing precision required for this is guaranteed by the use of the new Sterrox® liquid crystal polymer and metal reinforcements on the hub and axle mount. In line with the design of Noctua´s A series, the NF-A12x25 is a real all-rounder that achieves excellent results in all areas of applicationshows - regardless of whether it is a question of flow rate-oriented applications with low dynamic pressure such as housing ventilation or pressure-oriented scenarios with high air resistance such as use on coolers and water-cooling radiators. The 4-pin PWM version supports fully automatic speed control via PWM connections and comes with a low-noise adapter, which allows the maximum speed in PWM operation to be reduced from 2000 to 1700rpm. The overall package is rounded off by Noctua´s reference- class SSO2 bearing , a comprehensive accessories package and a 6-year manufacturer´s guarantee. Its superior efficiency, forward-looking design and uncompromising choice of materials make the NF-A12x25 a real premium product for the highest demands.


Features:

Next-generation performance:
- Noctua´s renowned 120mm models such as the NF-F12 and NF-S12A have received more than 400 awards and recommendations from international specialist publications and are considered among the best fans on the market. With its even higher efficiency and its new, state-of-the-art construction, the NF-A12x25 represents a further innovation push in terms of performance level and manufacturing technology.

Highly optimized P/Q curve for all applicationsHighly optimized P/Q curve for all applications:
- The advanced aerodynamic design of the NF-A12x25 enables an extremely strong pressure-flow rate characteristic (P/Q) especially in the critical middle range . This makes the NF-A12x25 a real all-rounder that works excellently in both pressure-sensitive and flow rate-sensitive applications.

Excellent application acoustics:
- While many fans generate unpleasant, high-pitched running noises as soon as they are installed in typical applications such as coolers or radiators, the NF-A12x25 has been carefully optimized for optimal application acoustics: Even with high dynamic pressure, the fan convinces with an even, pleasant frequency profile and surprisingly low sound pressure levels.

Flow Acceleration Channels:
- The impeller of the NF-A12x25 is equipped with so-called Flow Acceleration Channels on the suction side. By accelerating airflow in the critical outer regions of the fan blades, suction-side vortex shedding is reduced, resulting in higher efficiency and lower turbulence-related noise emissions.

Minimum impeller gap:
- The NF-A12x25 has an unprecedentedly narrow impeller gap (distance between the blade tips and the inside of the frame) of just 0.5mm. This extremely ambitious design sets a new record for 120mm fans and contributes to superior performance at higher dynamic pressures such as those found on coolers and radiators due to less leakage current through the gap between the rotor and the frame.

Metal reinforced hub area:
- The central hub area of ​​the NF-A12x25 is made entirely of steel and the axle mount has additional brass reinforcement. The combination of these two measures ensures ultimate precision and even better stability in the critical hub area

Sterrox® liquid crystal polymer:
- The rotor of the NF-A12x25 consists of Noctua´s novel Sterrox® liquid crystal polymer (LCP), which is characterized by extreme tensile strength, an exceptionally low coefficient of thermal expansion and excellent damping characteristics, which are ideal for reducing resonance and vibration phenomena in modern fan blade designs.

AAO framework system:
- Noctua´s AAO (Advanced Acoustic Optimization) frames have integrated vibration buffers as well as a stepped inlet area (Stepped Inlet Design) and an inner surface microstructure (Inner Surface Microstructures), which enable even better performance/noise efficiency.

Stepped inlet design:
- The graduated inlet area of ​​the stepped inlet design creates more turbulence in the inlet. This facilitates the transition from laminar to turbulent flow, which adheres better to the frame (flow attachment) and thus increases the suction capacity of the fan, especially where the suction area is limited.

Inner Surface Microstructures:
- The microstructure on the inside of the frame (Inner Surface Microstructures) creates a boundary layer through which the tips of the fan blades move. This reduces power separation from the suction side of the blade tips, resulting in a significant reduction in torsional noise and an increase in pressure and airflow efficiency.

Integrated anti-vibration pads:
- The anti-vibration pads made of extra-soft silicone reduce the transmission of the smallest vibrations and are also compatible with all standard mounting systems and fan clips used with CPU coolers.

Anti-vibration sealing lip for water cooling radiators:
- The NF-A12x25 ships with a silicone sealing lip that can be used when installing on water-cooling radiators and other applications that benefit from a tighter seal. The sealing lip contributes to the damping of minimal vibrations and the reduction of leakage currents between the fan and radiator to optimal cooling performance.

SSO2 storage system:
- The NF-A12x25 is equipped with the further optimized second generation of Noctua´s proven SSO bearing system. With SSO2, the rear magnet sits closer to the fan axis for even better stabilization, resulting in further improved precision and durability.

Metal bearing shell:
- In order to guarantee the greatest possible degree of manufacturing precision, minimum tolerances and excellent long-term stability, a CNC-milled brass bearing shell is used.

PWM IC with SCD:
- The fan supports fully automatic speed control via PWM and uses Noctua´s specially designed NE-FD1 chip for this purpose. This new PWM IC integrates Noctua´s Smooth Commutation Drive (SCD) technology, which minimizes PWM switching noise and makes the fan even quieter at low speeds.

Stops at 0% PWM:
- The fan can be brought to a complete standstill by being controlled by the mainboard or a fan controller with a PWM duty cycle (duty cycle) of 0%. This makes it ideal for semi-passive systems that switch off the fans at low thermal loads and thus run completely silently.

Smooth Commutation Drive 2:
- The latest, further developed version of Noctua´s SCD drive system guarantees excellent running smoothness by eliminating torque fluctuations and switching noise. This makes the fan surprisingly quiet even at close range.

Low noise adapter:
- The NF-A12x25 PWM comes with a (LNA) that reduces the maximum speed from 2000 to 1700rpm. This allows you to either run the fan at a constant 1700rpm or limit the maximum speed in PWM mode.

Comprehensive connection options:
- While the 20cm short primary cable helps to avoid cable clutter in typical applications, the included 30cm extension offers extra reach for all cases. Both cables are fully sheathed and a 4-pin Y-cable makes it possible to control a second PWM fan on the same connection.

Optional adapter for 140mm water cooling radiators:
- Thanks to its superior efficiency, the NF-A12x25 can also outperform many 140mm fans. In combination with the optional NA-FMA1 adapter frame, which allows installation on 140mm radiators, the NF-A12x25 is an excellent upgrade for 140mm-based water cooling systems.



- Format: 120x120x25mm
- Hole spacing: 105x105mm
- Connector & Pin Configuration: 4-pin PWM
- Cable length: 20cm + 30cm NA-EC1 Extension Cable
- Storage type: SSO2
- Leaf geometry A Series with Flow Acceleration Channels
- Frame technology AAO (Advanced Acoustic Optimization)
- Material Sterrox® LCP
- Rotation speed (+/-10%): 2000RPM
- Rotation speed with LNA: (+/-10%) 1700RPM
- Min. speed of rotation: @ 20% PWM (+/-20%) 450RPM
- Flow rate: 102.1 m³/h
- Volume flow with LNA: 84.5 m³/h
- Noise development: 22.6dB(A)
- Noise development with LNA: 18.8dB(A)
- Static pressure: 2.34mm
- Static pressure with LNA: 1.65mm
- Max. Input: 1.68W
- Max Current: 0.14A
- operating voltage: 12v
- Voltage PWM signal: 5 v
- MTTF >: 150,000 hrs

- Scope of delivery:
- Low Noise Adapter (LNA)
- 4-pin Y-cable
- 30cm cable extension
- NA-AV2 anti-vibration mounts
- Anti-vibration sealing lip for water cooling radiators
- Fan screws

- Notes and Warnings Further information:
- ButtonsPerformance comparison with the NF-F12 and NF-S12A
- ButtonsTechnical background and challenges in production
- ButtonsInterview with Lars Strömbäck (Noctua CTO)
- ButtonsWhich 120mm fan is right for me?

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