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

4.8 out of 5 stars 1,020 ratings

S$22.90
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Item dimensions LxWxH 40 x 40 x 20 millimetres
Brand Noctua
Power connector type 4-Pin
Voltage 12 Volts
Compatible devices Server
Noise level 14.9 dB
Maximum rotational speed 5000 RPM

About this item

  • 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

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


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Frequently bought together

  • Noctua NF-A4x20 PWM, Premium Quiet Fan, 4-Pin (40x20mm, Brown)
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  • Noctua NF-A4x10 PWM, Premium Quiet Fan, 4-Pin (40x10mm, Brown)
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From the brand


NF-A4x20 PWM header

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 PWM version sports Noctua’s custom-designed NE-FD1 IC for fully automatic speed control via 4-pin fan headers and comes with a Low-Noise Adaptor as well as an 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.

NF-A4x20 PWM NF-A4x20 FLX NF-A4x20 5V PWM NF-A4x20 5V
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: 1200 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

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4.8 out of 5 stars
4.8 out of 5
1,020 global ratings

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Top reviews from other countries

A. Tidmarsh
5.0 out of 5 stars Fast becoming my favourite little fan
Reviewed in the United Kingdom 🇬🇧 on 25 September 2021
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2 people found this helpful
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RaelRigs
5.0 out of 5 stars A great little fan
Reviewed in the United Kingdom 🇬🇧 on 7 December 2018
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9 people found this helpful
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Alex
5.0 out of 5 stars Cooling the NZXT H1 hotbox
Reviewed in the United Kingdom 🇬🇧 on 10 July 2020
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2 people found this helpful
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Peter Ernst
3.0 out of 5 stars Super Lüfter, Verpackung viel zu aufwändig!
Reviewed in Germany 🇩🇪 on 25 July 2019
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39 people found this helpful
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Si Staddon
5.0 out of 5 stars I love these fans they are quiet and reasonably easy to install
Reviewed in the United Kingdom 🇬🇧 on 8 January 2023
Verified Purchase