Noctua NF-A4x10 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x10mm, Brown)
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jess
> 3 dayThis fan was suggested by Amazon for use with the INVASION for Raspberry Pi 3, 2, B+ and 2B. If you are planning to use it with that device then beware...the chord that is attached to this little fan is much longer than you want to try and jam in that little case. We really struggled to try and make it work and even after all that may be returning the case because it just doesnt work as well as wed hoped. The fan however seems like it would be fantastic for the right case. May update the review if we can get it working in another case.
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Scotty
> 3 dayWas looking for a fan to keep my raspberry pi cooler while I have it mounted on to a ender 3 3D printer and it does pretty good, even with it being in inside a enclosure tent for the printer.
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Tony Putra
> 3 dayNice seller and good quality product
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Dan Jespersen
> 3 dayOrigin not clearly marked.
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Bates Hotel
> 3 dayVery Happy with this fan, quieted my DVR to near silent!
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Ms. Ruby Thompson
> 3 dayBest fan, works so nicely, and it’s soooooo quiet. I just wish it had a bit more cooling capacity.
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Greg Straub
09-06-2025I bought and tested a few 5v fans. The Noctua fan outperforms them all by ~20 degrees Celcius. The build quality is incredible and the soft silicone corner mounting points and fully sleeved cables are a plusses. I was able to use two of the included barbed rubber mounting rods instead of screws.
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Palindrome
> 3 dayMore expensive than other similar fans but very well made and quiet. I was replacing a fan in a charging station and bought this and a cheap fan to compare the difference. This fan was way quieter to me and worth the purchase. It was thinner than the 20mm thick fan and less air but the charger does not feel any hotter to the touch than with the old fan. With the Noctua the charger is now virtually silent. I have to get right up to the cooling ports to feel and hear it working.
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Robert B.
> 3 dayI use them on my Pi 3 to keep it cool, works great and quiet.
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3D graphics guy
Greater than one weekI used this to replace the extremely noisy case fan on my Ender 3 printer. I had replaced the main board so I could choose either a 24v (which Noctua doesnt have as best I can tell) or 5v version. The original fan sounded like a jet engine when it was running and this one is virtually silent.
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 |