---
product_id: 43634585
title: "NF-A4x20 FLX, Premium Quiet Fan, 3-Pin (40x20mm, Brown)"
brand: "noctua"
price: "₱2746"
currency: PHP
in_stock: true
url: https://www.desertcart.ph/products/43634585-nf-a4x20-flx-premium-quiet-fan-3-pin-40x20mm-brown
store_origin: PH
region: Philippines
---

# 40x40x20 mm compact size max. 14.9 dB(A) ultra-quiet 3-speed FLX control (3700-5000 RPM) NF-A4x20 FLX, Premium Quiet Fan, 3-Pin (40x20mm, Brown)

**Brand:** noctua
**Price:** ₱2746
**Availability:** ✅ In Stock

## Summary

> 🌀 Elevate your gear with silent, precision airflow—because your tech deserves the best.

## Quick Answers

- **What is this?** NF-A4x20 FLX, Premium Quiet Fan, 3-Pin (40x20mm, Brown) by noctua
- **How much does it cost?** ₱2746 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/43634585-nf-a4x20-flx-premium-quiet-fan-3-pin-40x20mm-brown)

## 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 Powerhouse:** Ultra-slim 40x40x20 mm design fits seamlessly into tight 1U spaces—ideal for routers, NAS, and professional-grade network gear.
- • **Whisper-Quiet Cooling:** Experience near-silent airflow with industry-leading 14.9 dB(A) noise levels—because your workspace deserves peace.
- • **Precision Speed Control:** Customize your cooling with three distinct RPM settings (3700, 4400, 5000) via Low-Noise Adaptors for perfect airflow balance.
- • **Vibration-Free Operation:** Anti-vibration mounts included to eliminate distracting noise and extend hardware longevity—engineered for the discerning professional.
- • **All-Inclusive Installation Kit:** Comes with fan screws, extension cable, and OmniJoin adaptor set for effortless integration into proprietary fan headers—plug and play perfection.

## Overview

The Noctua NF-A4x20 FLX is a premium 40x40x20 mm 12V 3-pin fan designed for ultra-quiet, customizable cooling in compact spaces. Featuring award-winning aerodynamic design, three adjustable speed settings, and anti-vibration mounts, it delivers superior airflow with minimal noise (max 14.9 dB(A)) and exceptional durability (>150,000 h MTTF). Perfect for 1U servers, network devices, and storage equipment, it includes a full accessory kit for seamless installation.

## Description

NF-A4x20 FLX, Premium Quiet Fan, 3-Pin (40x20mm, Brown)

## Features

- Premium quiet fan, 40x40x20 mm, 12V, 3-pin Molex, 5000/4400/3700 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 applications or replacing fans in network and storage equipment (routers, switches, NAS etc.) or other devices such as DVRs
- 3-pin FLX version provides 5000/4400/3700rpm speed settings via Low-Noise Adaptors to fine-tune the fan for maximum airflow or near-silent operation
- Includes anti-vibration mounts, fan screws, extension cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 0.79"L x 1.57"W x 1.57"H |
| Brand | Noctua |
| Power Connector Type | 3-Pin |
| Voltage | 12 Volts |
| Cooling Method | Air |
| Compatible Devices | Desktop |
| Noise Level | 14.9 Decibels |
| Material | Fibre-glass reinforced PBT |
| Maximum Rotational Speed | 3500 RPM |
| Global Trade Identification Number | 09010018100112 |
| Manufacturer | Noctua |
| Number of Items | 1 |
| Series | NF-A4x20 FLX |
| Item model number | NF-A4x20 FLX |
| Item Weight | 1.76 ounces |
| Item Dimensions  LxWxH | 1.57 x 1.57 x 0.79 inches |
| Color | beige / brown |
| ASIN | B071J8CZP9 |
| Is Discontinued By Manufacturer | No |
| Date First Available | June 3, 2017 |

## Product Details

- **Product Dimensions:** 0.79"L x 1.57"W x 1.57"H
- **Brand:** Noctua
- **Power Connector Type:** 3-Pin
- **Voltage:** 12 Volts
- **Cooling Method:** Air
- **Compatible Devices:** Desktop
- **Noise Level:** 14.9 Decibels
- **Material:** Fibre-glass reinforced PBT
- **Maximum Rotational Speed:** 3500 RPM
- **Global Trade Identification Number:** 09010018100112

## Images

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

## Available Options

This product comes in different **Size Name, Style Name** options.

## Frequently Bought Together

- Noctua NF-A4x20 FLX, Premium Quiet Fan, 3-Pin (40x20mm, Brown)
- Noctua NF-A4x10 FLX, Premium Quiet Fan, 3-Pin (40x10mm, Brown)

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**Shop now:** [https://www.desertcart.ph/products/43634585-nf-a4x20-flx-premium-quiet-fan-3-pin-40x20mm-brown](https://www.desertcart.ph/products/43634585-nf-a4x20-flx-premium-quiet-fan-3-pin-40x20mm-brown)

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-01-28*