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Noctua FLX 40mm Fan (NF-A4X20-FLX)

Noctua FLX 40mm Fan (NF-A4X20-FLX)
  • 40mm-Case-Fans-Noctua-NF-A4x20-FLX-40mm-Fan-5
  • 40mm-Case-Fans-Noctua-NF-A4x20-FLX-40mm-Fan-2
  • 40mm-Case-Fans-Noctua-NF-A4x20-FLX-40mm-Fan-3
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  • Product Name:
    Noctua FLX 40mm Fan (NF-A4X20-FLX)
  • Model Number:
  • Brand:
  • Manufacturer Warranty:
    6 Year





40x40x20 mm

Mounting hole spacing

32x32 mm

Connector & pin-configuration


Cable length

20cm + 30cm NA-EC1 extension cable



Blade geometry

A-Series with Flow Acceleration Channels

Frame technology

AAO (Advanced Acoustic Optimisation)

Rotational speed (+/- 10%)

5000 RPM

Rotational speed with L.N.A. (+/- 10%)

4400 RPM

Rotational Speed with U.L.N.A. (+/- 10%)

3700 RPM


9,4 m/h

Airflow with L.N.A.

8,3 m/h

Airflow with U.L.N.A.

6,9 m/h

Acoustical noise

14,9 dB(A)

Acoustical noise with L.N.A.

12,2 dB(A)

Acoustical noise with U.L.N.A.

8,5 dB(A)

Static pressure

2,26 mm Hโ‚‚O

Static pressure with L.N.A.

1,75 mm Hโ‚‚O

Static pressure with U.L.N.A.

1,23 mm Hโ‚‚O

Input power (typical)

0,46 W

Input power (max.)

0,6 W

Input current (typical)

0,04 A

Max. input current

0,05 A

Operating voltage

12 V


> 150.000 h

Scope of delivery

Low-Noise Adaptor (L.N.A.)

Ultra-Low-Noise Adaptor (U.L.N.A.)

30cm extension cable

OmniJoinโ„ข adaptor set

NA-AV3 anti-vibration mounts

Fan screws



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