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🌀 Elevate your gear’s cool factor—quiet, compact, and uncompromising.
The Noctua NF-A4x20 FLX is a premium 40x40x20mm quiet fan engineered for professional-grade cooling in compact devices like servers, NAS, and routers. Featuring advanced aerodynamic design, three adjustable speeds up to 5000 RPM, and ultra-low noise levels of 14.9 dB(A), it ensures efficient airflow with minimal sound. Its durable SSO2 bearing and flexible connectivity options make it a top-tier choice for demanding tech environments.
| ASIN | B071J8CZP9 |
| Best Sellers Rank | #35,416 in Computers ( See Top 100 in Computers ) #238 in Computer Case Fans |
| Brand | Noctua |
| Brand Name | Noctua |
| Compatible Devices | Server, Router, NAS, Switch, Video Recorder |
| Compatible devices | Server, Router, NAS, Switch, Video Recorder |
| Cooling Method | Air |
| Cooling method | Air |
| Customer Reviews | 4.8 out of 5 stars 2,593 Reviews |
| Global Trade Identification Number | 09010018100112 |
| Item Dimensions L x W x H | 20L x 40W x 40H millimeters |
| Item Highlight | High Airflow, Low Noise, Thickness 20 mm, Cooling PC or Components, 3 Speeds 5000/4400/3700 RPM 3 Pin |
| Item Weight | 50 Grams |
| Manufacturer | Noctua |
| Material Type | Fibre-glass reinforced PBT |
| Maximum Rotational Speed | 3500 RPM |
| Model | NF-A4x20 FLX |
| Noise Level | 14.9 Decibels |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | NF-A4x20 FLX |
| Power Connector Type | 3-Pin |
| Power connector type | 3-Pin |
| Product dimensions | 20L x 40W x 40H millimeters |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts |
R**X
Amazing silent fan
I order two silent fans and replace a very loud original fans for network switch. Amazing performance no sound at all.
D**N
Perfect for noisy TP-Link Switches
I bought a new TP-Link Switch and it was ridiculously noisy. I mean, I get that its supposed to live in a server room but surely they could've done something to tone it down a bit. Two of these to replace the ones inside the switch have made it almost silent while still providing sufficient airflow.
S**H
Just Wow
I have replaced stock fans from my Unifi Ubiquiti USG Pro and I here the sound barely, before with stock fans I mom used to complain about noise while she was in other bedroom. Now no sound from the fans at all, for your reference I am not using any low noice adaptors. I will purchase two more to replace in 24 port PoE switch.
D**N
Awesome
Works great in my switch, way quiter and moves the same amount of air.
M**.
Perfect for flex atx power supplies
Great silent fan! Works very well for replacing loud fans on flex atx power supplies
S**A
Me ha ayudado.
Lo ocupe para proyectos de electrónica y la verdad me a ayudado demaciado, me encanta que traiga demás conexiones para su configuración y entre otros más. Sinceramente muy buena marca Noctua.
Trustpilot
2 weeks ago
5 days ago