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Noctua NF-A12x25 PWM, Premium Quiet Fan, 4-Pin (120mm, Brown)

In stock.
Ships from United States.
  • PWM
  • FLX
  • ULN
  • 5V PWM
  • 5V
  • Premium quiet fan, 120x120x25mm, 12V, 4-pin PWM, max. 2000 RPM, max. 22.6 dB(A), >150,000 h MTTF
  • Next-generation 120x25mm A-series design provides unprecedented quiet cooling performance, ideal for CPU coolers and watercooling radiators
  • State-of-the-art engineering (AAO frame, Flow Acceleration Channels, record tight 0.5mm tip clearance) and construction (Sterrox LCP material, metal-reinforced hub, metal bearing shell, etc.)
  • 4-pin PWM version for automatic speed control via 4-pin PWM fan headers, 2000rpm maximum speed (1700rpm with supplied Low-Noise Adaptor)
  • Includes anti-vibration mounts, radiator gasket, fan screws, extension cable and y-cable for running two PWM fans on the same header

The NF-A12x25 is a highly optimised next-generation 120mm fan that integrates Noctua’s latest innovations in aerodynamic engineering in order to achieve an unprecedented level of quiet cooling performance. It takes state-of-the-art technologies such as the AAO (Advanced Acoustic Optimisation) frame or Flow Acceleration Channelsand combines them with a record tight tip clearance of only 0.5mm, which is made possible by using the novel Sterrox liquid-crystal polymer (LCP) compound as well as a metal-reinforced motor hub and axis for ultimate precision. Following the approach of Noctua’s A-series, the NF-A12x25 is a true all-rounder that yields superb results in all types of usage, regardless of whether it’s in low-impedance, airflow-oriented applications such as case cooling, or high-impedance, pressure-demanding scenarios such as on heatsinks and watercooling radiators. The 4-pin PWM version supports fully automatic speed control via PWM fan headers and comes with a Low-Noise Adaptor to reduce the maximum speed from 2000 to 1700rpm. Topped off with exceptional running smoothness, Noctua’s reference-class SSO2 bearing and a rich bundle of accessories, the NF-A12x25 is a premium-quality product through and through. Its superior efficiency, cutting-edge construction and pioneering materials make it an elite choice for the most discerning demands.


Highly optimised P/Q curve for all applications

Unlike the award-winning NF-F12 and NF-S12A models, which are specialised solutions for specific applications, the NF-A12x25 has been conceived to be a true all-rounder with superior performance in most common configurations: Whereas the NF-F12 is optimised for maximum static pressure and the NF-S12A is optimised for maximum airflow, the pressure to airflow (P/Q) curve of the NF-A12x25 has been carefully fine-tuned in the mid-section that is critical for achieving the best results in all common applications.

As can be seen from this chart, the NF-F12 produces higher maximum static pressure (top left) and the NF-S12A produces higher maximum airflow (bottom right), but at the relevant operating points, namely the impedance curves of the three sample applications, the NF-A12x25 provides a better balance of static pressure and airflow than the other two fans. This is the cornerstone of the NF-A12x25’s superior real-world performance.


Next-generation performance

Noctua’s 120mm fans such as the NF-F12 and NF-S12A are renowned as being among the best on the market and have received more than 400 awards and recommendations from the international press. With its further improved efficiency and novel, state-of-the-art engineering, the NF-A12x25 represents another step up in performance and manufacturing.


Ultra-tight tip clearance

The NF-A12x25 has a record tight tip clearance (distance between the blade tips and the inside of the frame) of only 0.5mm. This highly ambitious design sets a new benchmark for 120mm fans and helps the NF-A12x25 to work more efficiently against back pressure, such as on heatsinks or radiators, by reducing leak flows through the gap between impeller and frame.


Metal-reinforced motor hub

The centrepiece of the NF-A12x25’s motor hub is made entirely from steel and the axle mount is reinforced with an additional brass structure. In combination, both measures ensure ultimate precision and increased stability in the critical hub area.


Scope of delivery

  • Low-Noise Adaptor (L.N.A.)
  • 4-pin y-cable
  • 30cm extension cable
  • NA-AV2 anti-vibration mounts
  • Anti-vibration gasket for water cooling radiators
  • Fan screws
NF-A12x25 PWM
NF-A12x25 FLX
NF-A12x25 ULN
NF-A12x25 5V PWM
NF-A12x25 5V
Voltage 12 V 12 V 12 V 5 V 5 V
Connector 4-pin PWM 3-pin 3-pin 4-pin PWM 3-pin
RPM Max: 2000 / Min: 450 2000 1200 Max: 1900 / Min: 450 1900
RPM with L.N.A. 1700 1700 - - -
RPM with U.L.N.A. - 1350 900 - -
Acoustical Noise 22,6 dB(A) 22,6 dB(A) 12,1 dB(A) 21,4 dB(A) 21,4 dB(A)
Acoustical Noise with L.N.A. 18,8 dB(A) 18,8 dB(A) - - -
Acoustical Noise with U.L.N.A. - 14,2 dB(A) 7,6 dB(A) - -

Warranty & Returns

Warranty, Returns, And Additional Information


  • Limited Warranty period (parts): 6 years
  • Limited Warranty period (labor): 6 years
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