---
product_id: 51055796
title: "NF-A4x20 PWM, High-Performance Quiet Fan 40mm"
brand: "noctua"
price: "€ 38.31"
currency: EUR
in_stock: true
category: "Noctua"
url: https://www.desertcart.gr/products/51055796-nf-a4x20-pwm-high-performance-quiet-fan-40mm
store_origin: GR
region: Greece
---

# 5000 RPM max speed Ultra-quiet 14.9 dB(A) 4-pin PWM for smart control NF-A4x20 PWM, High-Performance Quiet Fan 40mm

**Brand:** noctua
**Price:** € 38.31
**Availability:** ✅ In Stock

## Summary

> 🌀 Cool smarter, not louder — the fan your setup deserves.

## Quick Answers

- **What is this?** NF-A4x20 PWM, High-Performance Quiet Fan 40mm by noctua
- **How much does it cost?** € 38.31 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/51055796-nf-a4x20-pwm-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

- • **Compact Yet Mighty:** 40x40x20 mm size fits perfectly in tight spaces like 1U servers and network gear without compromise.
- • **Whisper-Quiet Power:** Experience peak cooling at a barely-there 14.9 dB noise level—stay focused, stay cool.
- • **Precision Speed Control:** 4-pin PWM lets your system dynamically adjust fan speed for optimal airflow and energy efficiency.
- • **Award-Winning Aerodynamics:** Flow Acceleration Channels and Acoustic Optimisation deliver superior cooling with minimal noise.
- • **All-Inclusive Accessory Kit:** Anti-vibration mounts, extension cables, and OmniJoin adaptors ensure seamless, hassle-free installation.

## Overview

The Noctua NF-A4x20 PWM is a premium 40x40x20 mm quiet fan designed for professional-grade cooling in compact devices. Featuring a max speed of 5000 RPM, ultra-low noise of 14.9 dB(A), and 4-pin PWM for automatic speed control, it excels in 1U servers, network equipment, and electronics. Its award-winning aerodynamic design and comprehensive accessory kit make it the go-to choice for efficient, silent cooling backed by a 6-year warranty.

## Description

Premium quiet 40x20mm fan with advanced aerodynamic design for superior cooling performance. Features 4-pin PWM control for automatic speed adjustment.

## Features

- Premium quiet fan, 40x40x20 mm, 12V, 4-pin PWM, max. 5000 RPM, max. 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 servers or replacing fans in network and storage equipment (routers, switches, NAS etc.) or other devices such as DVRs
- 4-pin PWM version for automatic speed control via 4-pin PWM fan headers, 5000rpm maximum speed (4400rpm with supplied Low-Noise Adaptor)
- Includes anti-vibration mounts, fan screws, extension cable, y-cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07125KWG1 |
| Air Flow Capacity | 9.4 Cubic Metres Per Hour |
| Best Sellers Rank | 5,442 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 50 in Thermal Management Products 122 in Fans & Cooling |
| Brand | Noctua |
| Compatible Devices | Desktop |
| Cooling Method | forced air |
| Country Of Origin | China |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,654) |
| Global Trade Identification Number | 09010018100105 |
| Item Dimensions L x W x H | 40L x 40W x 20H millimetres |
| Item Highlight | High Airflow Low Noise 20mm Thick Fan, for PC and Electronics Cooling, Rich Accessory Kit, 5000rpm 4-Pin PWM |
| Item Weight | 20 Grams |
| Manufacturer | Noctua |
| Manufacturer Part Number | NF-A4x20 PWM |
| Material | Fibre-glass reinforced PBT |
| Max Rotational Speed | 5000 RPM |
| Model Number | NF-A4x20 PWM |
| Noise Level | 14.9 Decibels |
| Number of Items | 1 |
| Number of Packs | 1 |
| Power Connector Type | 4-Pin |
| Product Warranty | 6 year manufacturer’s warranty |
| Unit Count | 1.0 count |
| Voltage | 12 Volts |

## Product Details

- **Air flow capacity:** 9.4 Cubic Metres Per Hour
- **Brand:** Noctua
- **Compatible devices:** Desktop
- **Cooling method:** forced air
- **Material:** Fibre-glass reinforced PBT
- **Maximum rotational speed:** 5000 RPM
- **Noise level:** 14.9 Decibels
- **Power connector type:** 4-Pin
- **Product dimensions:** 40L x 40W x 20H millimetres
- **Voltage:** 12 Volts

## Images

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

## Questions & Answers

**Q: How can I use this fan with a 2 pin connection. I’ve just received it only to find my connection is 2 pin. Doh!**
A: Black is (-), red is (+) and yellow is just the probe. You disconnect/cut the yellow one and you have two active wires.

**Q: You replaced Hikvision nvr fan with Noc 40x20. What voltage did u use 12 or 5?**
A: This Noctua fan is rated 5V and this is the voltage to use.

**Q: has anyone tried this in a dan a4 case as a top fan? And would it be worth doing?**
A: I don't know where it would fit at the top of the A4, as the riser cables and psu cable take up the space, there might just be enough space on the GPU side. I have this fan zip-tied to the CPU side panel.

**Q: Good day, when will this item be back in stock again?**
A: it is https://www.amazon.co.uk/gp/offer-listing/B009NQLT0M/ref=dp_olp_new_mbc?ie=UTF8&condition=new

## Frequently Bought Together

- Noctua NF-A4x20 PWM, Premium Quiet Fan, 4-Pin (40x20mm, Brown)
- Noctua NF-A6x25 PWM, Premium Quiet Fan, 4-Pin (60mm, Brown)
- Noctua NF-A8 PWM, Premium Quiet Fan, 4-Pin (80mm, Brown)

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**Shop now:** [https://www.desertcart.gr/products/51055796-nf-a4x20-pwm-high-performance-quiet-fan-40mm](https://www.desertcart.gr/products/51055796-nf-a4x20-pwm-high-performance-quiet-fan-40mm)

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-09-19*