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

TechInn

Noctua Nf-a4x20 Flx 40 Cm Fan. Experience premium, silent cooling with the Noctua NF-A4x20 FLX, a 40mm fan built for compact, demanding applications. Its 20mm depth offers superior static pressure for dense heatsinks and tight enclosures. Featuring Noctua´s AAO frame with advanced acoustic optimizations and Flow Acceleration Channels, it moves more air quietly. The FLX design provides three speed settings (5000, 4400, 3700 RPM) for balanced performance and acoustics, powered by a long-lasting SSO2 bearing and SCD2 technology for near-inaudible operation. Ideal for servers, network gear, 3D printers, and compact PCs, it delivers reliable, high-performance cooling. Includes screws. Experience premium-grade, silent cooling in a compact form factor with the Noctua NF-A4x20 FLX, a highly optimised 40 mm fan designed for the most demanding applications. This fan represents the pinnacle of engineering in the small-form-factor space, making it the definitive choice for upgrading servers, network equipment, 3D printers, or any compact PC build where performance and acoustics are paramount.The NF-A4x20 FLX stands out with its 20 mm depth, a crucial design element that allows it to build up significantly more static pressure compared to standard 10 mm thick fans of the same diameter. This superior pressure performance makes it exceptionally effective in applications with high airflow impedance, such as cooling dense heatsinks, radiators, or navigating tightly packed enclosures with restricted ventilation paths.At the heart of its performance lies Noctu´s sophisticated AAO (Advanced Acoustic Optimisation) frame. This intelligent design incorporates integrated anti-vibration pads, a Stepped Inlet Design, and Inner Surface Microstructures. Together, these features work to reduce noise, improve airflow attachment, and enhance overall efficiency, resulting in a fan that moves more air while remaining remarkably quiet. The aerodynamic excellence is further boosted by Noctu´s proprietary Flow Acceleration Channels on the blades, which speed up the airflow at the crucial outer blade regions. This reduces suction side flow separation, leading to lower vortex noise and higher efficiency.True to its FLX (Flexibility) designation, this model provides three distinct speed settings to perfectly tailor its operation to your specific needs. Run it at the full 5000 RPM for maximum airflow, or use the included adapters to reduce the speed to 4400 RPM or an ultra-quiet 3700 RPM, giving you full control over the balance between performance and silence. The fan´s core is powered by Noctu´s renowned SSO2 bearing, a second-generation, self-stabilising oil-pressure bearing that guarantees exceptional operational smoothness, long-term stability, and an outstanding lifespan of over 150.000 hours. This is complemented by the state-of-the-art Smooth Commutation Drive 2 (SCD2) technology, which eliminates torque variations and switching noises, ensuring the motor itself is virtually inaudible.For any builder or IT professional seeking a robust, quiet, and high-performance 40 mm fan, the Noctua NF-A4x20 FLX is the ultimate solution, delivering advanced technology and reliable cooling where it matters most.If you´re passionate about.IT and electronics, like being up to date on technology and don´t miss even the slightest details, buy.Box Ventilator Noctua NF-A4x20 Ø 4 cm.at an unbeatable price. Type:Ventilator.Colour:Beige.Bronze.Speed:5000 rpm.4400 rpm.3700 rpm.Voltage:12 V.Airflow:8.3 M³/H.9.4 M³/H.Sound intensity:12.2 DB.14.9 DB.8.5 DB.Approx.diameter:Ø 4 cm.Includes:Screws. tradeinn Techinn

Amazon

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

123-3D UK

Is your 3D printer, computer or other device making too much noise? This Noctua fan offers the solution: it ensures that your device works whisper-quiet. The aerodynamic fans are popular for their robust, stable and above all quiet character. They ensure optimum airflow. The grooves in the AAO frame allow air to be routed as efficiently as possible for the best cooling results. The integrated shock absorbers and SSO2 bearings reduce the noise level and ensure stability.This fan has a size of 40mm x 40mm x 20mm. The FLX variant has a fixed rotational speed. With this fan you benefit from a six-year warranty.