
NF-A12x25 PWM chromax.black.swap
High-efficiency quiet 120mm fan
Pioneering design
With Sterrox® LCP & record tight 0.5mm tip clearance
Highly optimised P/Q curve
For outstanding performance in all applications
chromax.black.swap edition
With swappable coloured anti-vibration pads

Sterrox® liquid-crystal polymer compound
The NF-A12x25’s impeller is made from Noctua’s novel Sterrox® liquid-crystal polymer (LCP) compound that features extreme tensile strength, an exceptionally low thermal expansion coefficient and damping characteristics that are ideal for reducing resonance and vibration phenomena in advanced fan-blade designs.

chromax.black.swap edition
Maximising colour choices, Noctua’s chromax.black.swap edition fans can be colour-customised using the included swappable anti-vibration pads as well as optional anti-vibration mounts and cables. This makes them ideal for enthusiasts looking for true premium-grade fans that can be colour-coordinated with popular build themes such as all black, black & white or black & red.

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.

Highly optimised P/Q curve for all applications
The NF-A12x25’s sophisticated aerodynamic design allows for a pressure to airflow (P/Q) curve that is extremely strong in the critical mid-section. This means that the NF-A12x25 is a true jack-of-all-trades with excellent performance in both static pressure demanding and airflow demanding applications.
Further resources
Want to know more on this topic? Explore relevant articles and resources.
NF-A12x25: technical backgrounds and manufacturing challenges
From material limitations to microscopic tolerances, the NF-A12x25 was one of Noctua's most challenging projects to date. But how did they overcome these obstacles?
NF-A12x25: performance comparison to NF-F12 and NF-S12A
See how the NF-A12x25 stacks up against the NF-F12 and NF-S12A in airflow, pressure, and real-world performance.
NF-A12x25: interview with Lars Strömbäck (Noctua CTO)
The NF-A12x25 took over four years to develop, pushing Noctua’s R&D to new heights. Noctua’s CTO shares the innovations that make it a breakthrough in fan design.
Sterrox® liquid-crystal polymer (LCP)
Sterrox® LCP minimizes impeller creep, dampens vibrations, and improves acoustic performance, making Noctua fans quieter and more efficient.
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