Noctua NF-A4x10 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x10mm, Brown)
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JB
> 3 dayive been using these for years and they always set the bar
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Zachary
> 3 dayused this for my Rasp pi 3 that put under heavy load frequently. before it averaged 45-50C and now never really reaches 46. 10/10 recommend buying this.
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Chuxter
> 3 dayI bought the incorrect voltage model, so this will be returned. It comes in great packaging, with very flexible options for adapters. I wound up buying two fans with the correct voltage to replace the two in the security system I have.
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Amazin Customer
> 3 dayWorks as expected
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Jacob
Greater than one weekIf youre buying this for an ASUS Sabertooth Z170 S VREG assist fan, you may have to peel off a couple of the rubber shock absorbers just to fit properly. They just peel off like a sticker, so its no big deal.
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Sam B.
08-06-2025The 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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J.P.
> 3 dayI put this on my raspberry pi case. I used a dremel tool to create a bit more space for it, but it provides plenty of cooling so I can use it as an HTPC and server for my plex server. Very happy with it.
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Nicholas B
> 3 dayThis little guy was picked up by me for a replacement for the 40mm fan on the Raspberry Pi UPS hat, which leaves much to be desired even though the original was definitely above average for an RPi accessory. This Noctua baby-monster pushes SOOOO much more air compared to that one, and it is like seriously silent. Like, I cannot hear it. It sits about 5 feet from me much of the day, and Ive never noticed it.
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mark churms
> 3 dayGreat little fan! I used it to replace a noisy one in a studio light YN 900 I bought on Amazon.
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Cyro Ribeiro
> 3 dayOur DVR was too noisy for the place we installed it. So there were two noise sources. One was the HD, what we substituted for a laptop HD. Second it was the cooler 4x4 cm. Installing this Noctua one was easy and perfect. Althought it comes with a three wire connector, the connectors and adaptors are really professional. I used the supplied 3M Scotchlok, as the one from the proprietary fan was different, and it worked perfectly. Manual and instructions are easy and clear. And this fan is soo silent that now we have to look to the device leds to certify its working! Just great! Wonderful job, Noctua!
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 |