Noctua NF-A4x10 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x10mm, Brown)

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 isnt an issue with the fan since it isnt 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.

This 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.

Though small, this fan upholds Nocuta’s reputation. It’s very well made, virtually silent, and moves a decent amount of air for its size. I’m running it at 3.3V without issue

Fits my 3d printed case perfect, also tested with market cases - fits in all standard Pi size cases.

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.

Nice little fan. Using it to keep my raspberry pi cool and it does a great job at doing it.

Quiet and moves the air... bought it to replace a underpowered fan on my 3d printer.

I use these on my Raspberry Pi 3 and 4. The fans work well as simple, effective cooling solutions.

Good works good with reolink cameras nvr

I bought two to replace the noisy OEM fans in a video matrix and the difference is extremely pleasing. I had to look at the fan to be sure it was on. Air flow is low but comparable to the old fans. I spliced the fan connectors from the old fans onto the new using the connectors provided with the fan kit. The biggest problem I had was removing the old fans, their connectors were potted down to the board connectors.