Noctua NF-A4x10 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x10mm, Brown)
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Clyde Anderson
> 3 dayThis small fan was an inexpensive fix (replacement) for the very noisy CPU fan in my security system DVR. The holes on the new fan didnt line up with the holes in the old fan, so I carefully used some silicone cement to attach the new fan. It works great and is very quiet. The 3-prong to 2-prong adapter that came with the fan worked great.
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Mark R. Moore
05-06-2025Needed 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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Vasyl G
> 3 dayAwesome cooling fan. Works great with ODROID C2, brought temps down from 69C to 32C. Extremely quiet and has a good airflow. Definitely worth the money.
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R. R.
> 3 dayWell made
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mark churms
Greater than one weekGreat little fan! I used it to replace a noisy one in a studio light YN 900 I bought on Amazon.
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Mike
> 3 dayGdemu + noctua fan mod = quiet Dreamcast. This noise level is how it should have come in 99
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Christopher Karman
> 3 dayThe fan is quieter than a typical cheap fan you can find online. However, it doesnt seem to be as quiet as I would expect for a fan from Noctua especially at this price point. However, this being a 5V fan, it does work quite nicely off USB power (adapter required).
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C. Doneza
> 3 dayI used this fan to replace a ARX Cera Dyna FD0540-A3212A fan in my ADT DVR. The Cera Dyna was way louder. It eventually started to wobble and then it totally failed. The Noctua was a direct fit and super easy to install. Everything I needed was included in the kit. The only tools I needed were a pair of pliers and a Phillips screw driver. If I could rate this thing 10 stars, then I would. Im super happy.
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Dal Dude
> 3 dayIt was great when I first installed it, much quieter than the stock fan of my Dreamcast, but now its gotten louder and makes a annoying buzzing, vibrating sound. now its barely much quieter than the stock fan.
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Treg
> 3 dayNice little fan. Using it to keep my raspberry pi cool and it does a great job at doing it.
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 |