--- product_id: 82236934 title: "NF-A4x20 PWM" brand: "noctua" price: "€ 31.00" currency: EUR in_stock: true category: "Noctua" url: https://www.desertcart.pt/products/82236934-nf-a4x20-pwm store_origin: PT region: Portugal --- # >150,000 hours MTTF reliability 5000 RPM max speed Ultra-quiet 14.9 dB(A) NF-A4x20 PWM **Brand:** noctua **Price:** € 31.00 **Availability:** ✅ In Stock ## Summary > 🌀 Silence Meets Performance: Cool smarter, not louder. ## Quick Answers - **What is this?** NF-A4x20 PWM by noctua - **How much does it cost?** € 31.00 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/82236934-nf-a4x20-pwm) ## 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 - • **Built to Last:** Engineered with fibre-glass reinforced PBT and backed by a 6-year warranty for long-term peace of mind. - • **Compact Yet Mighty:** 40x40x20 mm size fits seamlessly into tight spaces like 1U servers, routers, and NAS devices. - • **Smart Speed Control:** 4-pin PWM technology automatically adjusts fan speed for optimal cooling and energy efficiency. - • **Vibration-Free Operation:** Includes anti-vibration mounts and accessories to ensure silent, stable performance. - • **Whisper-Quiet Powerhouse:** Experience premium airflow without the noise—perfect for focused work or serene home offices. ## Overview The Noctua NF-A4x20 PWM is a high-performance 40mm cooling fan designed for professional-grade electronics and compact systems. It delivers up to 5000 RPM with ultra-low noise levels of 14.9 dB(A), featuring advanced aerodynamic design and PWM speed control for efficient, quiet cooling. Built with durable materials and a comprehensive accessory kit, it ensures reliable, vibration-free operation with a lifespan exceeding 150,000 hours. ## Description Buy Noctua NF-A4x20 PWM, High-Performance Quiet Fan 40mm | High Airflow Low Noise 20mm Thick Fan, for PC and Electronics Cooling, Rich Accessory Kit, 5000rpm 4-Pin PWM: Case Fans - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## 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 | B071W93333 | | Air Flow Capacity | 9.4 cubic meter per hour | | Best Sellers Rank | #27 in Computer Case Fans | | Brand Name | Noctua | | Compatible Devices | Desktop | | Cooling Method | Air | | Customer Reviews | 4.8 4.8 out of 5 stars (2,087) | | Item Dimensions L x W x H | 1.57"L x 1.57"W x 0.79"H | | Item Highlight | High Airflow Low Noise 20mm Thick Fan, for PC and Electronics Cooling, Rich Accessory Kit, 5000rpm 4-Pin PWM | | Manufacturer | Noctua | | Material Type | Fibre-glass reinforced PBT | | Maximum Rotational Speed | 5000 rpm | | Model | NF-A4x20 PWM | | Noise Level | 14.9 db | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | NF-A4x20 PWM | | Power Connector Type | 4-Pin | | UPC | 841500110109 | | Unit Count | 1 Count | | Voltage | 12 volts | | Warranty Description | 6 year manufacturer’s warranty | ## Product Details - **Air Flow Capacity:** 9.4 cubic meter per hour - **Brand:** Noctua - **Compatible Devices:** Desktop - **Cooling Method:** Air - **Material:** Fibre-glass reinforced PBT - **Maximum Rotational Speed:** 5000 rpm - **Noise Level:** 14.9 db - **Power Connector Type:** 4-Pin - **Product Dimensions:** 1.57"L x 1.57"W x 0.79"H - **Voltage:** 12 volts ## Images ![NF-A4x20 PWM - Image 1](https://m.media-amazon.com/images/I/41ErcWMfUuL.jpg) ![NF-A4x20 PWM - Image 2](https://m.media-amazon.com/images/I/41EMb3tHSyL.jpg) ![NF-A4x20 PWM - Image 3](https://m.media-amazon.com/images/I/41JVxLmy1tL.jpg) ![NF-A4x20 PWM - Image 4](https://m.media-amazon.com/images/I/41HP2TDU+uL.jpg) ![NF-A4x20 PWM - Image 5](https://m.media-amazon.com/images/I/31X2wDNrNIL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: What is the CFM rating of this fan?** A: 5.5 cfm **Q: would anyone recommend this fan for a 3d printer hontend/part cooling fan?** A: Yes, we'd recommend using this fan for your 3d printer. (Please note that this is a 12V DC fan.) **Q: What is de difference between noctua nf-a4x20 pwm and noctua nf-a4x20 flx?** A: one fan is pwm controllable (pwm), the other is not (flx). PWM controlling: https://en.wikipedia.org/wiki/Computer_fan_control **Q: Is a 4-pin two Fan splitter included?** A: yes ## Frequently Bought Together - Noctua NF-A4x20 PWM, Premium Quiet Fan, 4-Pin (40x20mm, Brown) - Noctua NF-A4x10 FLX, Premium Quiet Fan, 3-Pin (40x10mm, Brown) - Noctua NF-A8 PWM, Premium Quiet Fan, 4-Pin (80mm, 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.pt/products/82236934-nf-a4x20-pwm](https://www.desertcart.pt/products/82236934-nf-a4x20-pwm) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-10-03*