Noctua NF-A4x10 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x10mm, Brown)
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TyrannyReiko
> 3 dayOur dvr system fan started having problems and we ordered this as a replacement after reading reviews. Got it installed and it works fine except for the fact it is way louder than the previous fan. It would be a great replacement for a laptop cause they sound the same but not for our dvr.
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John Wayne
Greater than one weekThis is a very high-quality fan. Great that it is offered in a 5v version too. The only issue I have is the rubber dampeners around each screw hole are very soft and get squished down easily with just a little bit of torque on each screw. Other than that this fan is great.
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OnMyWay
> 3 dayExcellent, high quality, QUIET fans. I used them to replace both fans in my originally very noisy Amcrest security camera DVR. I made a video to show I did it to hopefully help folks: https://www.youtube.com/watch?v=gEa-IAyuJeA
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Magnus Beer
10-06-2025This is a great little fan, although the air movement may not be substantial enough for some more demanding applications. I am just using this to replace the super cheap fan that came with my Raspberry Pi case, so it was perfect for me.
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Mark R. Moore
> 3 dayNeeded a fan to replace the fan I have been using on my Raspberry Pi. 24 hour operation takes a toll on the fans I tried so far. Figured maybe if I throw more money at it and hopefully get a better quality fan. Only been in operation for 3 weeks so its too soon to tell but its been humming along nicely so far. Quiet operation plus the unit comes with 3 different mounting options and 2 different adapter cables if you arent using it in a 3 pin situation which I am not in using it with a Raspberry Pi.
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Michael Harmer
> 3 dayI used this to repair a fan in an old ClearOne XAP 800. It worked beautifully without making a lot of noise. The installation kit was very complete and i didnt worry a bit about it possibly not being able to connect. It has been running non-stop now for a month or so with no signs of slowing down.
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Steve Hogan
Greater than one weekThis fan works great and comes with a lot of accessories as well as cool packaging. Definitely higher end quality all the way around
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zakaron
> 3 dayVery high quality fan. It comes with a wide assortment of adapters and even crimps for custom wiring jobs. It also moves a good amount of air.
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SACRICIDE
> 3 dayPretty quiet, and reliable. I had bad experience with cheaper cost fans because the bearings would go bad almost right when the return period would end. Happy with these
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American Patriot
> 3 dayWell packed, loaded with extras (cables, screws, connectors), well built and very quiet. My Lorex DVR has been noisy from the factory and their support staff slow and not helpful. Took matters in my own hands and bought this fan. Wow, is it quiet and well built.
Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and an AAO standard frame, the NF-A4x10 5V is a dedicated 5V version of Noctua’s highly optimised, premium quality quiet 40x10mm fan. Smooth Commutation Drive technology and Noctua’s reference class SSO2 bearing ensure superb running smoothness and excellent long-term stability. Topped off with modular cabling and the OmniJoin Adaptor Set, the NF-A4x10 5V is a premium choice for demanding 5V applications.
5V version
Many devices such as network or storage solutions use 5 volt 40mm fans. With the same operating voltage and the included OmniJoin adaptor set that makes it compatible with proprietary fan headers, the NF-A4x10 5V is ideal for replacing noisy or broken 5V 40mm fans.
Please Note: Being a 5V fan, the NF-A4x10 5V cannot be run at 12V and will be damaged when used with typical 12V power sources such as PC motherboard fan headers.
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Flow Acceleration ChannelsThe NF-A4x10 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 BearingThe NF-A4x10 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. |
Reduced motor hub sizeThanks to its streamlined, compact motor design, the NF-A4x10"s motor hub is smaller than with conventional 4cm fans. This allows for more blade surface area and thus contributes to the NF-A4x10"s superior airflow and pressure performance. |
Inner Surface MicrostructuresWith the tips of the fan blades ploughing through the boundary layer created by the Inner Surface Microstructures, flow separation from the suction side of the blades is significantly suppressed, which results in reduced blade passing noise and improved airflow and pressure efficiency. |
Please Note:
Being a 5V fan, the NF-A4x10 5V cannot be run at 12V and will be damaged when used with typical 12V power sources such as PC motherboard fan headers.
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| NF-A4x10 PWM | NF-A4x10 FLX | NF-A4x10 5V PWM | NF-A4x10 5V | |
| Connector | 4-pin PWM | 3-pin | 4-pin PWM | 3-pin |
| Voltage | 12V | 12V | 5V | 5V |
| RPM: | Max: 5000 / Min: 1000 | 4500 | Max: 5000 / Min: 1000 | 4500 |
| RPM with L.N.A. | 3700 | 3700 | - | - |
| Acoustical Noise | 19,6 dB(A) | 17,9 dB(A) | 19,6 dB(A) | 17,9 dB(A) |
| Acoustical Noise with L.N.A. | 12,9 dB(A) | 12,9 dB(A) | - | - |
| Size | 40x40x10 mm | 40x40x10 mm | 40x40x10 mm | 40x40x10 mm |