

🛠️ Small Fan, Big Impact: Quiet Cooling That Means Business
The Noctua NF-A4x10 PWM is a premium 40x40x10 mm quiet fan designed for professional-grade cooling in compact devices like 1U servers and network equipment. Featuring a 4-pin PWM connector for automatic speed control, it delivers up to 5000 RPM airflow at an ultra-low noise level of 19.6 dB(A). Built with durable fibre-glass reinforced PBT and backed by a 150,000+ hour MTTF rating, it includes a full accessory kit for easy, vibration-free installation.












| ASIN | B07DXRNYNX |
| Best Sellers Rank | #95 in Computer Case Fans |
| Brand | Noctua |
| Compatible Devices | Desktop |
| Cooling Method | Air |
| Date First Available | July 3, 2018 |
| Global Trade Identification Number | 00841501110443, 09010018100440 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 6 ounces |
| Item model number | NF-A4x10 PWM |
| Manufacturer | Noctua |
| Material | Fibre-glass reinforced PBT |
| Maximum Rotational Speed | 5000 RPM |
| Noise Level | 19.6 Decibels |
| Number of Items | 1 |
| Power Connector Type | 4-Pin |
| Product Dimensions | 1.57"L x 1.57"W x 0.39"H |
| UPC | 841501110443 |
| Voltage | 12 Volts |
S**L
This little guy moves ALL the air
Needed a solution for a RAID Controller (PERC H730) that was continually running at 52c in a Fractal Design Node 304 case. Designed and 3D Printed a bracket for it, installed on the same port as the rear fan so it's cranked up pretty good. It's almost silent, and took my temps down to 38c continuous. Absolutely worth the cost.
R**H
High quality everything when you buy Noctua
Ordered a few 40x10mm PMW controlled fans to mess around with a few of our Xbox’s. With the proper splitter plugged into series s mobo to utilize stock fan and noctua fan everything works great! No usb wires all over the place which I love. Have purchases other noctua fans and heatsyncs for my PC but every time is just as good as the first! This 40x10mm pmw fan came with high quality 4 pin splitter cable, low noise adapter cable, 4pin extension cable, omnijoin adapter plug and 3m terminal connectors then mounting screws and rubber mounting darts. Spent the extra money and get you some noctua products you will not be disappointed!
D**D
Great quiet fan
Needed to replace a very noisy motherboard fan on my old Asus Sabertooth Z170 Mark 1. As one reviewer mentioned, I did have to take the corner rubbers off the top of the fan in order for it to mount properly. Could not find an adapter cable to use with this fan to plug it into ASST_FAN1 small white male plug so I plugged it into ASST_FAN3 Works Great, very quiet... Noctua Rocks!!!
N**K
As always, Noctua is the best!
Yep. Noctua wins again! For those not familiar with fans and their intricacies, smaller fans often tend to be louder than larger fans. Tiny tiny fans like those 40mm and under can be painfully annoying as the RPMs reach breakneck speed. Noctua managed to keep the hub size so tiny, that there is actually room for air to move through the fins, instead of squeezing through the gap between the hub and the shell. This prevents that painful “whizzing” noise heard on most small fans. The engineering behind doing that is tricker than it seems, but Noctua doesn’t disappoint. It is DEAD quiet and moves decent air for the little fella. Great addition for hobby projects and PC mods. And as always, Noctua includes every adapter and amenity under the sun. The convenience included is alone worth the price. Spend the bit extra couple dollars, your ears and components will thank you.
N**O
Before you want to buy it ...
I bought three because heard about its reputation. it run quietly even though I set it to run over 2000RPM. size is smaller than my asian palm. connectivity is just plug and play. it cooldown my VRM up to 10 Celsius degree
M**W
Nice fan with accessories
I bought this to cool an LSI 9207-8i HBA (https://www.amazon.com/dp/B0085FT2JC), and it seems to be doing fine. This fan moves (at top speed) just under 5 CFM at just under 20 dB, which seems pretty typical. PWM means it can be connected to a PWM fan header to control its speed for even less noise, although even at full throttle, it's hardly audible a few feet away. It also comes with a boatload of accessories, including a PWM-capable Y adapter that allows connecting 2 fans (more, if you chain adapters) to a single header. Overall, I think it's a good choice for a quiet 40mm fan. (I'd imagine the Noctua A4x20 is also solid, however it appears to trade slightly higher airflow and double the height for a wider "dead zone" in the middle, which for my use — the fan is mounted directly on a heat sink — wasn't ideal.)
C**A
Perfect Case Fan For Low Amp Replacement Applications
I got this fan for a dying DVR I was hoping to repair. The running amps were the closest to what I was replacing and the old fan was quacking like a duck so it was needed. This fan was a little pricey but I was happy I spent the money. It includes lots of bundled adapters and mounting fasteners. I used the silicone pull through mounts and it runs perfectly silent with great airflow. Way better than the OEM. Highly recommended.
A**S
The little fan that could.
Great build quality, easy installation, unnoticeable noise levels, good value for money.
P**A
My PC's CPU temperature was low (35 – 52 degrees). However, the Z690 chipset was hovering around 80 – 90 degrees. Way too hot for my comfort. Made a simple mod by zip tying a 4cm Noctua fan to blow directly at the chipset heatsink. The temperature drops to between 61 and 69 degrees. ASUS made a mistake of removing the heatsink fan for aesthetic reason.
M**A
Excelente producto al inicio pensaba que era demasiado caro para un ventilador tan pequeña, pero de verdad que sí fama lo precede. Lo instale en una impresora 3d y me va de maravilla comparado con el que traía este es mucho muy silencioso, la verdad estoy muy satisfecho con la calidad de este producto
M**W
Its Noctua need I say more. It will replace my Tronxy CoreXY printers system fan, have also replaced the hotend cooling fan with noctua as well.
E**I
3d yazıcıya taktım. Gayet sessiz çalışıyor
M**N
Gekocht voor mijn 3d printer the upgrade en zo als je al weet zijn het top dingen
Trustpilot
2 weeks ago
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