Noctua NF-A4x10 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x10mm, Brown)
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Whos on First
> 3 dayNoctua fans are always quiet and dependable. This o e is no exception. Perfect replacement for a much noisier cooling fan.
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peter
> 3 daysuperb fan real quite
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R. Mellott
Greater than one weekI was very disappointed in this fans noise level. I have other Noctura fans in my system and am very pleased w/ them but this one was way off the charts in noise level. I used a generic one instead thats virtually silent.
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Vasyl G
Greater than one weekAwesome 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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StephenM
10-06-2025A pricey but high quality little fan. decently quiet, doesnt make odd noises or vibration like other cheap small fans.comes with a bunch of adapters to fin about any use case.
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Keith R. Castelli
> 3 dayNot much to say about it. Its a Noctua fan. Quality is always great, its nice and quiet, not a big fan of the color but my case doesnt have a window so Im not upset about it. I dont think Ive ever regretted buying a noctua fan.
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Sam B.
> 3 dayThe MiSTer I/O board comes with a fan that is quite loud but keeps the boards cool. Many have gone over to this fan for near silent operation. It was easy to install, but if you want a more custom fit, you will have to cut the cables down to make them smaller in length. However, the cables will fold and you can squeeze the cables to fit your MiSTer case well. You can run the fan at 3V for silent operation. You can also move the fan jumper and run it at 5V, but it will run a little louder.
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ROBERTO GUACH
Greater than one weekGood works good with reolink cameras nvr
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James
> 3 dayUsing this on my Ender 3 and had originally thought it did not work it was so quiet!! The PSU fan is now the loudest fan on my printer.
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Phil
> 3 dayPerfect replacement fan for an old Dreamcast (requires 3D printed adapter). Wires are really long and I was impressed with the packaging and hardware/adapters that were included even though I didn’t need them in my case.
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 |