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🛠️ Upgrade your gear with the silent powerhouse that keeps your tech cool and your focus sharper.
The Noctua NF-A4x20 FLX is a premium 40x40x20mm quiet fan designed for compact devices like network switches and NAS units. Featuring advanced aerodynamic design with Flow Acceleration Channels and an AAO frame, it delivers efficient cooling at ultra-low noise levels (max 14.9 dB(A)). With three adjustable speeds (3700-5000 RPM) and a 3-pin connector plus OmniJoin™ adaptors, it offers versatile, easy installation and long-lasting performance backed by a >150,000 hour MTTF rating.
| ASIN | B071J8CZP9 |
| Best Sellers Rank | #12,961 in Computers ( See Top 100 in Computers ) #79 in Computer Case Fans |
| Brand | Noctua |
| Brand Name | Noctua |
| Compatible Devices | Desktop, Laptop |
| Compatible devices | Desktop, Laptop |
| Cooling Method | Air |
| Cooling method | Air |
| Customer Reviews | 4.8 out of 5 stars 2,490 Reviews |
| Global Trade Identification Number | 09010018100112 |
| Item Dimensions L x W x H | 20L x 40W x 40H millimeters |
| 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 |
| 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.
R**.
Gute und leise Lüfter
Den NF-A4x20 FLX habe ich gekauft, um einen alten HP 1810G-24 (J9980A) leiser zu machen; die Serienlüfter heulen bei voller Drehzahl zu hart los. Nach dem Tausch ist der Unterschied Tag und Nacht (siehe Videos). Einmal aufpassen: auf die Luftrichtung. Noctua druckt die Pfeile auf den Rahmen, ich habe sie übersehen und durfte die Lüfter wieder rausnehmen und andersherum einsetzen. Beim Anschluss meldet die 3-Pin-Version dem Switch die Drehzahl zurück, sodass keine Meldung über einen Lüfterfehler kommt. Ehrlicher Haken: offen ist Ruhe, mit zugeschraubtem Deckel kommt etwas Geräusch zurück. Trotzdem meilenweit besser als vorher. Verarbeitung, Laufruhe und Zubehör sind top, dazu die lange Garantie. Jetzt kann das Gerät wieder neben mir stehen statt im Keller. Hat sich gelohnt.
D**R
Not a peep
Replacing like for like in a Netgear switch, these didn't work at all.
Trustpilot
1 month ago
3 weeks ago