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  • MX43952 NF-S12A FLX 120mm Case Fan
  • MX43952 NF-S12A FLX 120mm Case Fan
  • MX43952 NF-S12A FLX 120mm Case Fan
  • MX43952 NF-S12A FLX 120mm Case Fan


NF-S12A FLX 120mm Case Fan

Product Info

The NF-S12A marks the third generation of Noctua’s signature S12 series quiet case fans, which have received more than 250 awards and recommendations from the international press.

Featuring a further refined blade design with Anti-Stall Knobs that works in tandem with the new AAO (Advanced Acoustic Optimisation) frame, the NF-S12A improves the airflow/noise efficiency of its renowned predecessor by up to 8%.

The FLX version provides 1200/900/700rpm speed settings via the supplied Low-Noise Adaptors in order to give you full flexibility in fine-tuning the fan for maximum ventilation performance or near-silent operation. Its superb running smoothness, SSO2 bearing and Noctua’s trusted premium quality make it an elite choice for quiet case cooling.


featureAward-winning S12 design
The NF-S12A features the third evolution of Noctua’s classic Straight Blade Design that has earned its S12 series countless recommendations from hardware journalists and enthusiasts around the world. Further optimised for even better airflow/noise efficiency, it makes the NF-S12A an ideal quiet case fan.

feature Anti-Stall Knobs
The NF-S12A’s Anti-Stall Knobs reduce flow separation phenomena in medium to high impedance situations and thereby increase the fan’s stall margin. This means that the NF-S12A is even more versatile than its renowned predecessor and can achieve better performance on heatsinks and radiators

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

featureStepped 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.

feature 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.

featureIntegrated 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.

featureSmooth Commutation Drive 2
The latest version of Noctua’s advanced Smooth Commutation Drive system ensures superb running smoothness by eliminating torque variations and switching noises. This makes the NF-A14 remarkably quiet even at very close distance.

feature 3 speed settings for full flexibility
Providing 1200, 900 and 700 rpm speed settings via the supplied Low-Noise and Ultra-Low-Noise Adapters, the NF-S12A FLX (Flexibility) can be fine-tuned for superior airflow or maximum quietness.

featureExtensive cabling options
The fan’s short 20cm primary cable minimises cable clutter in typical applications while the supplied 30cm extension provides extended reach when necessary. Both cables are fully sleeved.

featureSSO2 Bearing
The NF-S12A features the further optimised second generation of Noctua’s renowned, time-tested SSO bearing. With SSO2, the rear magnet is placed closer to the axis to provide even better stabilisation, precision and durability

featureMetal bearing shell
In order to guarantee the highest possible degree of manufacturing precision, minimum tolerance and excellent long-term stability, the NF-S12A sports a CNC milled bearing shell made entirely from brass.

feature 6 years manufacturer’s warranty
Noctua fans are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, the NF-S12A features an MTBF rating of more than 150.000 hours and comes with a full 6 years manufacturer’s warranty.


Size 120 x 120 x 25 mm
Connector 3-pin
Bearing SSO2
Blade Geometry S-Series with Anti-Stall Knobs
Frame Technology AAO (Advanced Acoustic Optimisation)
Rotational Speed (+/- 10%) 1200 RPM
Rotational Speed with L.N.A. (+/- 10%) 900 RPM
Rotational Speed with U.L.N.A. (+/- 10%) 700 RPM
Airflow 107,5 m³/h
Airflow with L.N.A. 83,2 m³/h
Airflow with U.L.N.A. 65,8 m³/h
Acoustical Noise 17,8 dB(A)
Acoustical Noise with L.N.A 10,7 dB(A)
Acoustical Noise with U.L.N.A. 7,4 dB(A)
Static Pressure 1,19 mm H2O
Static Pressure with L.N.A. 0,73 mm H2O
Static Pressure with U.L.N.A. 0,51 mm H2O
Max. Input Power 1,44 W
Max. Input Current 0,12 A
Voltage 12 V
MTBF > 150.000 h