---
product_id: 46683114
title: "NF-A4x20 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x20mm, Brown)"
brand: "noctua"
price: "₩46367"
currency: KRW
in_stock: true
reviews_count: 13
category: "Noctua"
url: https://www.desertcart.kr/products/46683114-nf-a4x20-5v-premium-quiet-fan-3-pin-5v-version
store_origin: KR
region: South Korea
---

# 150,000+ hours MTTF durability Ultra-quiet 14.9 dB(A) noise level 5000 RPM high-speed cooling NF-A4x20 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x20mm, Brown)

**Brand:** noctua
**Price:** ₩46367
**Availability:** ✅ In Stock

## Summary

> 🌀 Silent cooling that means business — keep your gear chill and your workspace zen.

## Quick Answers

- **What is this?** NF-A4x20 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x20mm, Brown) by noctua
- **How much does it cost?** ₩46367 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/46683114-nf-a4x20-5v-premium-quiet-fan-3-pin-5v-version)

## 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

- • **5V 3-Pin Compatibility:** Optimized for 5V industrial applications and Raspberry Pi setups, ensuring versatile plug-and-play use.
- • **Compact 40x20mm Design:** Fits seamlessly into tight 1U spaces and network gear, ideal for routers, switches, NAS, and DVRs.
- • **Whisper-Quiet Powerhouse:** Experience premium airflow at a barely-there 14.9 dB(A), perfect for noise-sensitive environments.
- • **Award-Winning Engineering:** Flow Acceleration Channels and Acoustic Optimisation frame deliver superior cooling with minimal noise.
- • **Complete Installation Kit:** Includes anti-vibration mounts, screws, extension cable, and OmniJoin adaptor for hassle-free setup.

## Overview

The Noctua NF-A4x20 5V is a premium, ultra-quiet 40x20mm fan designed for 5V industrial and compact applications. With a maximum speed of 5000 RPM and noise levels as low as 14.9 dB(A), it offers exceptional airflow and durability (150,000+ hours MTTF). Its award-winning design features advanced acoustic optimization and comes with a full accessory kit for easy installation in tight spaces like network switches, NAS devices, and Raspberry Pi cases.

## Description

Buy Noctua NF-A4x20 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x20mm, Brown): Case Fans - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

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.
Review: Unbelievably quiet and efficient - 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.

## 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 | #365 in Computer Case Fans |
| Brand | Noctua |
| Compatible Devices | Desktop |
| Cooling Method | Air |
| Date First Available | July 12, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.39 ounces |
| Item model number | NF-A4x20 5V |
| Manufacturer | Noctua |
| Material | Fibre-glass reinforced PBT |
| Maximum Rotational Speed | 5000 RPM |
| Noise Level | 14.9 Decibels |
| Number of Items | 1 |
| Power Connector Type | 3-Pin |
| Product Dimensions | 1.57"L x 1.57"W x 0.79"H |
| UPC | 841500110123 |
| Voltage | 5 Volts |

## Product Details

- **Brand:** Noctua
- **Compatible Devices:** Desktop
- **Cooling Method:** Air
- **Material:** Fibre-glass reinforced PBT
- **Maximum Rotational Speed:** 5000 RPM
- **Noise Level:** 14.9 Decibels
- **Power Connector Type:** 3-Pin
- **Product Dimensions:** 1.57"L x 1.57"W x 0.79"H
- **UPC:** 841500110123
- **Voltage:** 5 Volts

## Images

![NF-A4x20 5V, Premium Quiet Fan, 3-Pin, 5V Version (40x20mm, Brown) - Image 1](https://m.media-amazon.com/images/I/71lyRpVR4OL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Great fan, not too audible
*by B***N on February 21, 2025*

This fan replaced a ball bearing fan that was too loud for my application. This noctua fan fits the bill, trading off some cfm for a more enjoyable experience I have this connected to my car's usb port in the center console to cool down my phone while it's plugged in for apple carplay

## 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.kr/products/46683114-nf-a4x20-5v-premium-quiet-fan-3-pin-5v-version](https://www.desertcart.kr/products/46683114-nf-a4x20-5v-premium-quiet-fan-3-pin-5v-version)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-28*