---
product_id: 46683114
title: "Noctua NF-A4x20 5V, High-Performance Quiet Fan 40mm"
brand: "noctua"
price: "€ 36.36"
currency: EUR
in_stock: true
reviews_count: 13
category: "Noctua"
url: https://www.desertcart.sk/products/46683114-noctua-nf-a4x20-5v-high-performance-quiet-fan-40mm
store_origin: SK
region: Slovakia
---

# >150,000 hours MTTF reliability 5000 RPM high-speed airflow Ultra-quiet 14.9 dB noise level Noctua NF-A4x20 5V, High-Performance Quiet Fan 40mm

**Brand:** noctua
**Price:** € 36.36
**Availability:** ✅ In Stock

## Summary

> 🌀 Elevate your cooling game with whisper-quiet precision — because your gear deserves the best.

## Quick Answers

- **What is this?** Noctua NF-A4x20 5V, High-Performance Quiet Fan 40mm by noctua
- **How much does it cost?** € 36.36 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/46683114-noctua-nf-a4x20-5v-high-performance-quiet-fan-40mm)

## Best For

- noctua enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Award-winning design backed by over 150,000 hours of mean time to failure and a 6-year warranty.
- • **Compact Yet Mighty:** 40x40x20 mm size fits perfectly in tight 1U spaces without compromising airflow.
- • **Whisper-Quiet Power:** Experience premium cooling with barely-there noise at just 14.9 dB.
- • **Precision 5V Performance:** Optimized 5000 RPM speed tailored for 5V industrial and network devices.
- • **Vibration-Free Operation:** Includes anti-vibration mounts and OmniJoin adaptor for seamless, silent integration.

## Overview

The Noctua NF-A4x20 5V is a compact, high-performance 40mm fan engineered for ultra-quiet operation at 5000 RPM. Designed with advanced acoustic optimization and Flow Acceleration Channels, it delivers superior airflow with minimal noise (14.9 dB). Ideal for 1U server racks, network equipment, and industrial 5V applications, it includes anti-vibration mounts and versatile connectors for easy installation. Built for durability with over 150,000 hours MTTF and backed by a 6-year warranty, this fan is the go-to choice for professionals demanding reliable, silent cooling.

## Description

Buy Noctua NF-A4x20 5V, High-Performance Quiet Fan 40mm | High Airflow Low Noise, 5V, 20mm Thick Fan, for Ventilation and Electronics Cooling, With OmniJoin Adaptor, 5000rpm 3-Pin: Case Fans - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Worth the premium price! Top quality and well designed. - Man these fans are GREAT! The design and their accompanying parts in the box are well thought out. Everything I needed for my slight-odd installation was included. And they are just QUIET! But yet they push plenty of air to keep my system cool. Looking for quiet replacement fans? Buy these! They are worth the premium price.
Review: Good airflow, quiet, omnijoin adapter is good, overkill box - I used the noctua fan to replace a loud fan in a network switch. The OmniJoin adapter that was included was easily usable and works well. I had to use the anti-vibration fan connectors because the previous fan screw holes were smaller than the noctua fan screw holes. The anti-vibration fan connectors were installed and trimmed, but the network switch case didn't fit properly over the anti-vibration fan connectors. It had to be shoved on, but it worked out. The fan moves a good amount of air, but not as much as the original fan. This is still enough air to keep the switch cool, while being fairly quiet. The fan is still audible (at 5v constant, non-PWM), but I believe this is mostly due to the design of the case, not the fan's fault. The box is a bit overkill and has great presentation, but I would rather the item cost less than have a fancy box. Overall, this is a great product and can make most server gear into home gear. There isn't much for competition of noctua's 40mm quiet fans, so you kind of have to deal with noctua's high prices if you need a quiet 40mm fan.

## Features

- Premium quiet fan, 40x40x20 mm, 5V, 3-pin Molex, 5000 RPM, 14.9 dB(A), >150,000 h MTTF
- Award-winning A-series design with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance
- 40x20mm size ideal for 1U applications or replacing fans in network and storage equipment (routers, switches, NAS etc.) or other devices such as DVRs
- 5V 3-pin version (5000rpm) for 5V-based industrial applications or replacing 5V fans in various devices
- Includes anti-vibration mounts, fan screws, extension cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B072Q3CMRW |
| Best Sellers Rank | #412 in Computer Case Fans |
| Brand | Noctua |
| Brand Name | Noctua |
| Compatible Devices | Desktop |
| Cooling Method | Air |
| Customer Reviews | 4.8 out of 5 stars 396 Reviews |
| Item Dimensions L x W x H | 1.57"L x 1.57"W x 0.79"H |
| Item Highlight | High Airflow Low Noise, 5V, 20mm Thick Fan, for Ventilation and Electronics Cooling, With OmniJoin Adaptor, 5000rpm 3-Pin |
| Manufacturer | Noctua |
| Material Type | Fibre-glass reinforced PBT |
| Maximum Rotational Speed | 5000 rpm |
| Model | NF-A4x20 5V |
| Noise Level | 14.9 db |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | NF-A4x20 5V |
| Power Connector Type | 3-Pin |
| Product Dimensions | 1.57"L x 1.57"W x 0.79"H |
| UPC | 841500110123 |
| Unit Count | 1 Count |
| Voltage | 5 volts |
| Warranty Description | 6 year manufacturer’s warranty |

## Product Details

- **Brand:** Noctua
- **Compatible Devices:** Desktop
- **Cooling Method:** Air
- **Material:** Fibre-glass reinforced PBT
- **Maximum Rotational Speed:** 5000 rpm
- **Noise Level:** 14.9 db
- **Power Connector Type:** 3-Pin
- **Product Dimensions:** 1.57"L x 1.57"W x 0.79"H
- **Voltage:** 5 volts

## Images

![Noctua NF-A4x20 5V, High-Performance Quiet Fan 40mm - Image 1](https://m.media-amazon.com/images/I/71lyRpVR4OL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worth the premium price! Top quality and well designed.
*by C***W on September 14, 2026*

Man these fans are GREAT! The design and their accompanying parts in the box are well thought out. Everything I needed for my slight-odd installation was included. And they are just QUIET! But yet they push plenty of air to keep my system cool. Looking for quiet replacement fans? Buy these! They are worth the premium price.

### ⭐⭐⭐⭐⭐ Good airflow, quiet, omnijoin adapter is good, overkill box
*by A***A on April 28, 2020*

I used the noctua fan to replace a loud fan in a network switch. The OmniJoin adapter that was included was easily usable and works well. I had to use the anti-vibration fan connectors because the previous fan screw holes were smaller than the noctua fan screw holes. The anti-vibration fan connectors were installed and trimmed, but the network switch case didn't fit properly over the anti-vibration fan connectors. It had to be shoved on, but it worked out. The fan moves a good amount of air, but not as much as the original fan. This is still enough air to keep the switch cool, while being fairly quiet. The fan is still audible (at 5v constant, non-PWM), but I believe this is mostly due to the design of the case, not the fan's fault. The box is a bit overkill and has great presentation, but I would rather the item cost less than have a fancy box. Overall, this is a great product and can make most server gear into home gear. There isn't much for competition of noctua's 40mm quiet fans, so you kind of have to deal with noctua's high prices if you need a quiet 40mm fan.

### ⭐⭐⭐⭐⭐ Unbelievably quiet and efficient
*by S***D on July 8, 2024*

I was skeptical when the price of this fan as so much more than others, boy was I glad I still purchased it! The quality of this fan compared to others is unmatched. This fan works off of a 5V pin from a raspberry pi, which most others do not. You can barely tell the fan is on when listening to it it is so quiet. My Pi is in a 3D printed case and without the fan reaches 190C within minutes. With the fan, the pi has not exceeded 110C once over the course of months. I can not rave enough about this fan.

## Frequently Bought Together

- Noctua NF-A4x20 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x20mm, Brown)
- Noctua NF-A4x10 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x10mm, Brown)
- OPSFALCON 2 Pack USB to 3-Pin / 4-Pin PWM 5V USB Sleeved Fan Power Adapter Cable, USB to 3 Pin / 4 Pin Case Fan Adapter Connector Cable (USB-3Pin/4Pin Cable)

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**Shop now:** [https://www.desertcart.sk/products/46683114-noctua-nf-a4x20-5v-high-performance-quiet-fan-40mm](https://www.desertcart.sk/products/46683114-noctua-nf-a4x20-5v-high-performance-quiet-fan-40mm)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-10-28*