Nf-A4X20 PWM, Premium Quiet Fan, 4-Pin (40X20Mm, Brown)
Nf-A4X20 PWM, Premium Quiet Fan, 4-Pin (40X20Mm, Brown)
Nf-A4X20 PWM, Premium Quiet Fan, 4-Pin (40X20Mm, Brown)
Nf-A4X20 PWM, Premium Quiet Fan, 4-Pin (40X20Mm, Brown)
Nf-A4X20 PWM, Premium Quiet Fan, 4-Pin (40X20Mm, Brown)
Nf-A4X20 PWM, Premium Quiet Fan, 4-Pin (40X20Mm, Brown)
Nf-A4X20 PWM, Premium Quiet Fan, 4-Pin (40X20Mm, Brown)

Nf-A4X20 PWM, Premium Quiet Fan, 4-Pin (40X20Mm, Brown)

Premium quiet fan, 40x40x20 mm, 12V, 4-pin PWM, max. 5000 RPM, max. 14.9 dB(A), >150,000 h MTTF...
Vendor: High Rating
SKU: e437cb47-2a6b-4bef-bea4-086cd8568d44
Availability: In Stock
£15.51
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£15.51
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Size Name: 40X20Mm
Style Name: 12 Volt Pwm
Subtotal: £15.51
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Nf-A4X20 PWM, Premium Quiet Fan, 4-Pin (40X20Mm, Brown)

Nf-A4X20 PWM, Premium Quiet Fan, 4-Pin (40X20Mm, Brown)

£0.00 £15.51

Nf-A4X20 PWM, Premium Quiet Fan, 4-Pin (40X20Mm, Brown)

£0.00 £15.51
Size Name: 40X20Mm
Style Name: 12 Volt Pwm
  • 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

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.

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-RC7 Low-Noise Adaptor (L.N.A)
  • NA-YC1 4-pin PWM y-cable
  • NA-EC1 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.

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Customer Reviews
4.8 out of 5 stars
18,314
4.8 out of 5 stars
18,314
4.8 out of 5 stars
18,314
4.8 out of 5 stars
18,314
Price £13.95£13.95 £12.79£12.79 £13.95£13.95 £13.95£13.95
Connector 12 V 12 V 5V 5V
Voltage 4-pin PWM 3-pin 4-pin PWM 3-pin
RPM Max: 5000 / Min: 1000 5000 Max: 5000 / Min: 1000 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

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

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Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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