Features:

  • Premium quiet fan, 40x40x10 mm, 5V, 3-pin Molex, 4500 RPM, 17.9 dB(A), >150,000 h MTTF
  • Award-winning 40x10mm A-series fan with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance
  • Ideal replacement for noisy or broken 5V 4cm fans in 3D printers, DVRs, NAS, switches, routers, other network and storage devices, etc.
  • 3-pin 5V version with 4500rpm, not to be used at 12V (such as in PC environments)
  • Includes anti-vibration mounts, fan screws, Low-Noise Adaptor, extension cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers
Good replacement fan for Prusa MK3 hotend

The first impression is always the most important one: the packaging is just excellent and contains a lot of information, very well designed and not a cheap chinglsih design or text. The fan is designed in Austria and manufactured in Taiwan. It comes with a 6 year manufacture warranty. I needed to replace the OEM hotend fan (also made by Noctua). The 5V version is a perfect replacement --- although the supplied cable is too short and the connectors don't work with the Prusa MK3 controller board, however this is not an issue as the original cable with the matching connector can be reused and connected to the fan either by soldering or by using the included 3M Scotchlok IDC Butt Connectors --- just make sure to follow the included instructions. I soldered the cables and covered the soldering areas with heat shrink tubing. I'm so impressed that I'll order more for cooling my Raspberry Pies.

BUY IT.... if you have a loud Security system DVR.

I read the reviews because I have a Lorex Flir DVR and the noise of their DVR fan annoyed the hell out of me! I could not sleep for months because of the loud white noise and there was no way I could relocate the DVR the way my house is set up. I did a bit of research on a tech blog and someone recommended another fan and this one. I chose this one because you will need the two pin attachment and the other fan did not have that. The Lorex DVR has two fans, I recommend changing both fans to achieve the noise reduction and it will reduce by a lot. Great product.... only had it in for 2 days but I am happy with it. Thank you for saving my sleep and sanity Noctua!

Best replacement for noisy security camera DVR fan.

I bought this to replace the failing fan in my Lorex security camera DVR. The original fan was whining bad because it’s not designed to be laid down. The bearings go bad in a year and it sounds terrible. I spent many hours on the phone with Lorex trying to get a warranty replacement, but gave up because they have no true customer service. This fan had been mentioned a lot on forums as a good replacement for security camera DVR’s and I would agree. The only down side is the holes don’t line up with anything on the heat sink. I zip tied it to the heat sink and didn’t look back. The fan is so quiet I had to check on it several times before being sure it was still working and not dead. I’m planning on upgrading to a newer camera system and will most likely just install these fans prior to setting the system up.

I literally don't hear it, but my speakers are cool.

I have several of Noctua's fans in my PC: NF-F12 iPPC 3000 PWM, NF-S12A PWM, NF-P12. They are very effective at keeping my severely overclocked system cool, and while they are very quiet, I still do hear them. This one though, the NF-A4x10, I don't hear this one at all. I can be in a silent room and still not hear this fan, but it moves a lot of air for its size. I previously had two, generic 40x40mm fans cooling the heat sinks on the back of my speakers. They had very loud whirring noises and would vibrate on my desk, which was unacceptable. I replaced them with one NF-A4x10. It's just sitting on my desk behind the speakers without being mounted to anything. It doesn't vibrate or make any noise, but it keeps my speakers very cool. Best of all, this fan runs 5 V and might be the only Noctua fan that operates on 5 V. I would highly recommend this for projects involving small electronics, transistors, or microcontrollers.

I bought this to cool my Raspbery Pi 3

I bought this to cool my Raspbery Pi 3. I am completely blown away by how quiet this fan is! It comes with multiple adapters and would easily connect to a lot of different pieces of hardware. It took my Pi from 42 C (I had previously added a heatsink) to 36 C as measured by "vcgencmd measure_temp" with the case open and no load on the CPU. I'm very satisfied with Noctua, and they'll be my first choice for any fans I buy in the future. (seriously, I'm *that* impressed!)

Very quiet fans, also come with a lot of accessories.

Bought an Amcrest 1080p 8 camera system and the fans that come with the DVR are crazy loud. I read complaints about the fan noise on the DVR and dismissed them until I got the thing. Saw that other people bought two of these fans to replace 1) the case fan, and 2) the CPU fan. So I picked up two of them. These fans are very nice. They come with silicone pads and silicone feet and also have a 2 hole adapter. Best of all, they are extremely quiet, which is their claim to fame.

A Great Little Fan

This is a very quite little fan that move a good amount of air. I bought it for a raspberry pi 3b and a case. I had to modify it a bit to connect to the pi but that isn't an issue with the fan since it isn't made specifically for it. The fan was packed in a shipping box that was the right size unlike some fans that come in boxes that would hold a dozen fans and are stuffed with packing paper. I'm a big fan (I'll show myself out) of Noctua and this little guy does nothing to change that.

One of the nicest fans I've ever used.

This 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. This fan is extremely quiet to the point where I forget that it's running on my desk two feet away from me; quiet audio or nearby PC fans easily drown it out. Little things like the rubber pads on the corners and a decent type of bearing definitely help keep things quiet as well. It also comes with some vibration-dampening silicon mounting hardware, but my case is too thick to use them properly. In fact, I'm using screws that are too narrow to avoid drilling my case to fit the proper screws, and I haven't had any vibration issues yet. While it's much more quiet than the fan I replaced, it does move a bit less air. I don't have actual air movement specs for the old fan, but it spun over 5000 RPM, so it makes sense that it would move more air. Once plugged in, the old fan was able to propel itself across my desk until it's wires were taut or it fell over. The A-Series isn't quite the show-off in that regard, but it still cools off my Pi very nicely. My idle temp with the old fan was 38-41 degrees, and now it's 40-43. Mind you, my system is overclocked to 1.4ghz, and idle temps would hit 60 degrees without a fan. Everything is still nice and cool, so I'll gladly take the silence in exchange for running slightly warmer. This fan comes with a lot of great extra hardware and adapters. That said, I wish it came with an adapter for the Raspberry Pi, considering how many other people seem to be using this fan for this application. Like other reviewers, I needed to make a minor modification; I had to carefully cut away some of the tape, unpin the connector, snip the yellow cable, re-tape the wires, and re-pin the connector to match the GPIO pins on the Pi. It only took about five minutes and required some basic tools, but it certainly voids any warranty or chance for a return/exchange. If I could get nit-picky, it also doesn't have the most flexible wiring unless you strip all of the wrapping, but it's still quite workable.

Worth every penny.

This fan is awesome. I bought this to replace the exhaust fan on my Amcrest DVR. With the original fan it measured about 55 dB from a foot away. With the months fan it measured 35dB. Feels like it puts out as much air if not more. I used the silicon mounts it came with and it holds it very secure but doesn't allow noise from the fan to resonate through the chassis of the DVR. Definitely worth the money.

Five Stars

Works great with my raspberry pi. Comes with scotchloks. Brought CPU temps down from 50C to 30C.

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