Noctua NF-A4x20 PWM, Premium Quiet Fan, 4-Pin (40x20mm, Brown)

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  • Premium quiet fan, 40x40x20 mm, 12V, 4-pin PWM, max. 5000 RPM, max. 14.9 dB(A), >150,000 h MTTF
  • Award-winning A-series design with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance
  • 40x20mm size ideal for 1U servers or replacing fans in network and storage equipment (routers, switches, NAS etc.) or other devices such as DVRs
  • 4-pin PWM version for automatic speed control via 4-pin PWM fan headers, 5000rpm maximum speed (4400rpm with supplied Low-Noise Adaptor)
  • Includes anti-vibration mounts, fan screws, extension cable, y-cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers

Product Description

The NF-A4x20 is a highly optimised quiet 40×20 mm fan in premium quality, which uses future-oriented construction measures such as Flow Acceleration Channels as well as Noctua's AAO frame system. The PWM version uses Noctua's specially designed NE-FD1 IC for fully automatic speed control via 4-pin connections and comes with a low-noise adapter that allows the maximum speed in PWM operation from 5000 to 4400rpm. Its excellent smoothness, the SSO2 reference class bearing and Noctua's proven premium quality make the NF-A4x20 PWM a sophisticated choice for the highest demands.

40 x 20 mm format.

Compared to Noctua's award-winning NF-A4x10, the NF-A4x20 has double the depth. This allows for higher printing performance and makes the NF-A4x20 the perfect choice for higher air resistance applications.

Flow acceleration channels.

The impeller of the NF-A4x20 is equipped with so-called flow acceleration channel. By accelerating airflow in critical external regions of the fan blades, suction side vortex detachment, resulting in higher efficiency and lower turbulence-related noise emission.

SSO2 bearing system.

The NF-A4x20 is equipped with the further optimised second generation of Noctua's proven SSO bearing system. With SSO2, the rear magnet sits closer to the fan axis, resulting in even better stabilisation, resulting in further improved precision and durability.

Integrated anti-vibration pads.

Made from extra-soft silicone, the anti-vibration pads reduce the transmission of minimal vibrations and are also compatible with all standard screws as well as standard mounting systems or fan clips used in CPU coolers.

Box contents:

Low-noise adapter (L.N.A. OmniJoin 4-pin Y-cable, 30 cm cable extension, adapter set, NA-AV3, anti-vibration attachments, fan screws.

AAO frame system.

Noctua's AAO (Advanced Acoustic Optimisation) frames have integrated vibration buffer as well as a stepped inlet area and an internal micro-structure (inner surface microstructures) that allow even better performance/noise efficiency.

Connection & Pin ConfigurationOperating voltage:RPM.RPM with L.N.A.RPM with U.L.N.A.Noise:Noise with L.N.A.Noise with U.L.N.A.Format:
4-pin PWM.3-pin.4-pin PWM.3-pin.
12 V.12 V.5 V.5 V.
Max. 5000 / min: 1000.5000.Max. 5000 / min: 1000.5000.
14.9 dB(A).14.9 dB(A).14.9 dB(A).14.9 dB(A).
12.2 dB(A).12.2 dB(A).
8.5 dB(A).
40 x 40 x 20 mm.40 x 40 x 20 mm.40 x 40 x 20 mm.40 x 40 x 20 mm.
SKU: B07125KWG1
Weight: 180 g
Dimensions: 4 x 2 x 4 cm; 180 Grams
Brand: Noctua
Model: NF-A4x20 PWM
Colour: Brown
Batteries Included: No
Manufacture: Noctua
Colour: Brown