Noctua NF-A4x20 FLX Premium Quiet Fan 3-Pin (40x20mm Brown) compatible with Desktop

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Noctua NF-A4x20 FLX Premium Quiet Fan 3-Pin (40x20mm Brown) compatible with Desktop

Regular Price: US$35.99

Special Price US$29.99

Availability: In stock

Supplier: Noctua

Category: Electronics Computers & Accessories Computer Components Internal Components Fans & Cooling Case Fans

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Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua’s AAO frame, the NF-A4x20 is a highly optimised, premium-quality quiet fan in size 40x20mm. The FLX version provides 5000/4400/3700rpm speed settings via the supplied Low-Noise Adaptors and includes the OmniJoin Adaptor Set for easy connection to proprietary fan headers. Its superb running smoothness, reference-class SSO2 bearing and Noctua’s trusted premium quality make it an elite choice for the highest demands.

40x20mm size

Compared to Noctua’s award-winning NF-A4x10, the NF-A4x20 is twice as thick, which allows for increased static pressure performance and makes the NF-A4x20 ideal for demanding applications with high flow resistance.


Flow Acceleration Channels The NF-A4x20 impeller features suction side Flow Acceleration Channels. By speeding up the airflow at the crucial outer blade regions, this measure reduces suction side flow separation and thus leads to better efficiency and lower vortex noise.	SSO2 Bearing The NF-A4x20 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.	Integrated 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 mounting systems and fan clips used on heatsinks.	Scope of delivery NA-RC10 Low-Noise Adaptor (L.N.A) NA-RC12 Ultra-Low-Noise Adaptor (U.L.N.A) NA-EC2 30cm extension cable OmniJoin adaptor set 4x NA-AV3 anti-vibration mounts Fan screws

AAO 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.


	NF-A4x20 PWM	NF-A4x20 FLX	NF-A4x20 5V PWM	NF-A4x20 5V
Connector	4-pin PWM	3-pin	4-pin PWM	3-pin
Voltage	12V	12V	5V	5V
RPM	Max: 5000 / Min: 1200	5000	Max: 5000 / Min: 1100	5000
RPM with L.N.A.	4400	4400	-	-
RPM with U.L.N.A.	-	3700	-	-
Acoustical Noise	14,9 dB(A)	14,9 dB(A)	14,9 dB(A)	14,9 dB(A)
Acoustical Noise with L.N.A.	12,2 dB(A)	12,2 dB(A)	-	-
Acoustical Noise with U.L.N.A.	-	8,5 dB(A)	-	-
Size	40x40x20 mm	40x40x20 mm	40x40x20 mm	40x40x20 mm
Colour	Brown & Beige	Brown & Beige	Brown & Beige	Brown & Beige