---
product_id: 146640809
title: "NF-A4x20 5V PWM Premium-Quality Quiet 40mm Fan"
brand: "noctua"
price: "$61.95"
currency: USD
in_stock: true
reviews_count: 1
category: "Noctua"
url: https://www.desertcart.us/products/146640809-nf-a4x20-5v-pwm-premium-quality-quiet-40mm-fan
store_origin: US
region: United States of America
---

# NF-A4x20 5V PWM Premium-Quality Quiet 40mm Fan

**Brand:** noctua
**Price:** $61.95
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** NF-A4x20 5V PWM Premium-Quality Quiet 40mm Fan by noctua
- **How much does it cost?** $61.95 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/146640809-nf-a4x20-5v-pwm-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

Review: Do you hear anything? - This is an amazing fan, it has such low noise I can barely hear. It’s speed is as per specification and helps with better heat management. Strongly recommended if you’re looking for a replacement for 5v PWM fan

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B071FNHVXN |
| Best Sellers Rank | #106,243 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #534 in Case Fans |
| Brand | Noctua |
| Brand Name | Noctua |
| Compatible Devices | Desktop, Gaming Console, Laptop, Server |
| Cooling Method | forced air |
| Country of Origin | USA |
| Customer Reviews | 4.8 out of 5 stars 826 Reviews |
| Global Trade Identification Number | 09010018100136 |
| Item Weight | 84 Grams |
| Max Rotational Speed | 2000 RPM |
| Noise Level | 14.9 Decibels |
| Power Connector Type | 4-Pin |
| Unit Count | 1.0 Count |
| Voltage | 5 Volts |

## Product Details

- **Brand:** Noctua
- **Compatible Devices:** Desktop, Gaming Console, Laptop, Server
- **Cooling Method:** forced air
- **Power Connector Type:** 4-Pin
- **Voltage:** 5 Volts

## Images

![NF-A4x20 5V PWM Premium-Quality Quiet 40mm Fan - Image 1](https://m.media-amazon.com/images/I/71lyRpVR4OL.jpg)
![NF-A4x20 5V PWM Premium-Quality Quiet 40mm Fan - Image 2](https://m.media-amazon.com/images/I/71hrcJhq7BL.jpg)
![NF-A4x20 5V PWM Premium-Quality Quiet 40mm Fan - Image 3](https://m.media-amazon.com/images/I/81LqMRpLO2L.jpg)
![NF-A4x20 5V PWM Premium-Quality Quiet 40mm Fan - Image 4](https://m.media-amazon.com/images/I/81abh0+LmWL.jpg)
![NF-A4x20 5V PWM Premium-Quality Quiet 40mm Fan - Image 5](https://m.media-amazon.com/images/I/71WxE+WP+2L.jpg)

## Questions & Answers

**Q: what is the cfm rating?**
A: 5.532631039983588 CFM

**Q: Can these be wired to a usb connector and run off a usb wall charger?**
A: Yes. I run mine off of the gpio pins on a raspberry pi. That's the same concept.

**Q: Does this noctua nf-a4x20 5v pwm premium-quality quiet 40mm fan come with the mounting screws?**
A: Yes, it comes with screws a couple of different connectors for attaching it to 3 and 4 pin connections also some rubbery plug things to pull through the mount holes.

**Q: Can a 3.3v PWM signal be used to control fan speed?**
A: Yes, a 3.3V logic (PWM) signal will control this fan.  I use an Arduino DUE board to control this fan.  The DUE puts out 3.3V logic signals.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Do you hear anything?
*by A***K on 1 November 2025*

This is an amazing fan, it has such low noise I can barely hear. It’s speed is as per specification and helps with better heat management. Strongly recommended if you’re looking for a replacement for 5v PWM fan

## Frequently Bought Together

- Noctua NF-A4x20 5V PWM, Premium Quiet Fan, 4-Pin, 5V Version (40x20mm, Brown)
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**Shop now:** [https://www.desertcart.us/products/146640809-nf-a4x20-5v-pwm-premium-quality-quiet-40mm-fan](https://www.desertcart.us/products/146640809-nf-a4x20-5v-pwm-premium-quality-quiet-40mm-fan)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-21*