--- product_id: 270153121 title: "NF-A4x20 FLX, Premium Quiet Fan, 3-Pin (40x20mm, Brown) | High Airflow, Low Noise, Thickness 20 mm, Cooling PC or Components, 3 Speeds 5000/4400/3700 RPM 3 Pin" brand: "noctua" price: "198.94 DT" currency: TND in_stock: true category: "Noctua" url: https://www.desertcart.tn/products/270153121-nf-a4x20-flx-premium-quiet-fan-3-pin-40x20mm-brown store_origin: TN region: Tunisia --- # 3-speed 3700/4400/5000 RPM 40x40x20mm compact size Ultra-quiet max 14.9 dB(A) NF-A4x20 FLX, Premium Quiet Fan, 3-Pin (40x20mm, Brown) | High Airflow, Low Noise, Thickness 20 mm, Cooling PC or Components, 3 Speeds 5000/4400/3700 RPM 3 Pin **Brand:** noctua **Price:** 198.94 DT **Availability:** ✅ In Stock ## Summary > 🌀 Elevate your gear’s cool factor with whisper-quiet precision! ## Quick Answers - **What is this?** NF-A4x20 FLX, Premium Quiet Fan, 3-Pin (40x20mm, Brown) | High Airflow, Low Noise, Thickness 20 mm, Cooling PC or Components, 3 Speeds 5000/4400/3700 RPM 3 Pin by noctua - **How much does it cost?** 198.94 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/270153121-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:** Designed in a sleek 40x40x20mm form factor, ideal for tight 1U server racks, NAS, routers, and other critical network gear. - • **Whisper-Quiet Cooling:** Experience near-silent airflow with max noise at just 14.9 dB(A), perfect for focused workspaces and professional setups. - • **Plug & Play Versatility:** Includes OmniJoin™ adaptor set for seamless 3-pin connection to proprietary headers, making upgrades and replacements hassle-free. - • **Precision 3-Speed Control:** Tailor your cooling with flexible 3700, 4400, or 5000 RPM settings to balance performance and silence effortlessly. - • **Award-Winning Aerodynamics:** Flow Acceleration Channels and Advanced Acoustic Optimisation frame deliver superior airflow efficiency and reduced turbulence. ## Overview The Noctua NF-A4x20 FLX is a premium 40x40x20mm quiet fan engineered for professional-grade cooling in compact devices like servers, NAS, and routers. Featuring advanced aerodynamic design, ultra-low noise levels (max 14.9 dB(A)), and flexible 3-speed operation, it ensures reliable airflow with exceptional smoothness and longevity (>150,000 hours MTTF). Its versatile 3-pin connectivity and award-winning build make it the go-to choice for millennial managers demanding silent, efficient performance in their tech setups. ## Description Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua’s AAO frame, the NF-A4x20 is a highly optimised, premium-quality quiet fan in size 40x20mm. The FLX version provides 5000/4400/3700rpm speed settings via the supplied Low-Noise Adaptors and includes the OmniJoin™ Adaptor Set for easy connection to proprietary fan headers. Its superb running smoothness, reference-class SSO2 bearing and Noctua’s trusted premium quality make it an elite choice for the highest demands. ## Features - Premium quiet fan, 40x40x20 mm, 12V, 3-pin Molex, 5000/4400/370 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B071J8CZP9 | | Best Sellers Rank | #14,651 in Computers ( See Top 100 in Computers ) #76 in Computer Case Fans | | Brand Name | Noctua | | Compatible Devices | Server, Router, NAS, Switch, Video Recorder | | Cooling Method | Air | | Customer Reviews | 4.8 4.8 out of 5 stars (2,586) | | Global Trade Identification Number | 09010018100112 | | Item Dimensions L x W x H | 20L x 40W x 40H millimeters | | Item Highlight | High Airflow, Low Noise, Thickness 20 mm, Cooling PC or Components, 3 Speeds 5000/4400/3700 RPM 3 Pin | | Item Weight | 50 Grams | | Manufacturer | Noctua | | Material Type | Fibre-glass reinforced PBT | | Maximum Rotational Speed | 3500 RPM | | Model | NF-A4x20 FLX | | Noise Level | 14.9 Decibels | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | NF-A4x20 FLX | | Power Connector Type | 3-Pin | | Unit Count | 1.0 Count | | Voltage | 12 Volts | ## Product Details - **Brand:** Noctua - **Cooling method:** Air - **Power connector type:** 3-Pin - **Product dimensions:** 20L x 40W x 40H millimeters - **Voltage:** 12 Volts ## Images ![NF-A4x20 FLX, Premium Quiet Fan, 3-Pin (40x20mm, Brown) | High Airflow, Low Noise, Thickness 20 mm, Cooling PC or Components, 3 Speeds 5000/4400/3700 RPM 3 Pin - Image 1](https://m.media-amazon.com/images/I/71lyRpVR4OL.jpg) ## Available Options This product comes in different **Size, Style** 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) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/270153121-nf-a4x20-flx-premium-quiet-fan-3-pin-40x20mm-brown](https://www.desertcart.tn/products/270153121-nf-a4x20-flx-premium-quiet-fan-3-pin-40x20mm-brown) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-12*