---
product_id: 248968064
title: "Noctua NF-A4x20 FLX Premium-Quality Quiet 40mm Fan"
brand: "noctua"
price: "€ 63.83"
currency: EUR
in_stock: false
reviews_count: 6
category: "Noctua"
url: https://www.desertcart.com.cy/products/248968064-noctua-nf-a4x20-flx-premium-quality-quiet-40mm-fan
store_origin: CY
region: Cyprus
---

# Noctua NF-A4x20 FLX Premium-Quality Quiet 40mm Fan

**Brand:** noctua
**Price:** € 63.83
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** Noctua NF-A4x20 FLX Premium-Quality Quiet 40mm Fan by noctua
- **How much does it cost?** € 63.83 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/248968064-noctua-nf-a4x20-flx-premium-quality-quiet-40mm-fan)

## Best For

- noctua enthusiasts

## Why This Product

- Trusted noctua brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Noctua NF-A4x20 FLX Premium-Quality Quiet 40mm Fan : desertcart.in: Computers & Accessories

Review: Super silent - Super silent, buy it
Review: I used this to replace the fan in my hub. Keeps things cool.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B072JK9GX6 |
| Air Flow Capacity | 9.4 Cubic Meters Per Hour |
| Are batteries included? | No |
| Best Sellers Rank | #59,945 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #274 in Case Fans |
| Brand | Noctua |
| Compatible Devices | Desktop, Server, Router, Switch |
| Cooling Method | Air |
| Customer Reviews | 4.8 4.8 out of 5 stars (2,356) |
| Date First Available | 15 September 2017 |
| Item Dimensions LxWxH | 40 x 40 x 20 Millimeters |
| Item Height | 2 Centimeters |
| Item Weight | 170 g |
| Item Width | 4 Centimeters |
| Item model number | NF-A4x20 FLX |
| Manufacturer | Noctua |
| Maximum Rotational Speed | 2000 RPM |
| Model number | NF-A4x20 FLX |
| Net Quantity | 1.0 Count |
| Noise Level | 14.9 Decibels |
| Power Connector Type | 4-Pin |
| Product Dimensions | 4 x 4 x 2 cm; 170 g |
| UPC | 841500110116 |
| Voltage | 12 Volts |

## Product Details

- **Brand:** Noctua
- **Compatible Devices:** Desktop, Server, Router, Switch
- **Cooling Method:** Air
- **Power Connector Type:** 4-Pin
- **Voltage:** 12 Volts

## Images

![Noctua NF-A4x20 FLX Premium-Quality Quiet 40mm Fan - Image 1](https://m.media-amazon.com/images/I/31OnoEuHNeL.jpg)
![Noctua NF-A4x20 FLX Premium-Quality Quiet 40mm Fan - Image 2](https://m.media-amazon.com/images/I/31Oq81WhOjL.jpg)
![Noctua NF-A4x20 FLX Premium-Quality Quiet 40mm Fan - Image 3](https://m.media-amazon.com/images/I/31X2wDNrNIL.jpg)
![Noctua NF-A4x20 FLX Premium-Quality Quiet 40mm Fan - Image 4](https://m.media-amazon.com/images/I/41EMb3tHSyL.jpg)
![Noctua NF-A4x20 FLX Premium-Quality Quiet 40mm Fan - Image 5](https://m.media-amazon.com/images/I/41ErcWMfUuL.jpg)

## Questions & Answers

**Q: Whats the cfm of this fan?**
A: The output, converted from 9.4 m3/h is just 5.5 cfm, very low indeed.

**Q: 14.9dba at what speed?**
A: 5000rpm.

**Q: How many dB is this fan?**
A: 14.9db(a)

**Q: What is the mtbf. How many hours of life can I expect from one of these?**
A: Not sure about the Mtbf, but i purchased 2 of this in Jan 2020, and they have been running 24/7 till now with no problems. Installed them in my 2 poe+ switches

## Customer Reviews

### ⭐⭐⭐⭐⭐ Super silent
*by A***L on 11 January 2026*

Super silent, buy it

### ⭐⭐⭐⭐⭐ Review
*by A***R on 20 November 2025*

I used this to replace the fan in my hub. Keeps things cool.

### ⭐⭐⭐⭐⭐ Review
*by A***S on 20 July 2021*

I have fitted these, blowing, into my Ubiquiti UniFi USG-Pro-4 and I can report the high pitch whine is now gone. Pretty handy when you don't have a rack out of the way of habitual areas! Only been installed an hour but so far so good, and I chose to use the noise suppression mounts, they aren't recommended for this application but I wanted to try it and the resonance from the metal cover is now much more subtle. Running these fans without a cover show they are actually virtually silent, but obviously, it's not recommended to run this device with the cover off (airflow etc)!

## Frequently Bought Together

- Noctua NF-A4x20 FLX Computer Case Fan - Cooling Components (Computer Case, Fan, 4 cm, 3700 RPM, 5000 RPM, 4400 RPM)
- Noctua NF-A4x10 FLX, Premium Quiet Fan, 3-Pin (40x10mm, Brown)
- Noctua NF-A4x20 PWM, Premium Quiet Fan, 4-Pin (40x20mm, Brown)

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**Shop now:** [https://www.desertcart.com.cy/products/248968064-noctua-nf-a4x20-flx-premium-quality-quiet-40mm-fan](https://www.desertcart.com.cy/products/248968064-noctua-nf-a4x20-flx-premium-quality-quiet-40mm-fan)

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-09*