Noctua NF-A4x20 PWM Premium Quiet Fan 40x20mm 4-Pin 5000RPM

Keep your compact systems running cool and silent with the Noctua NF-A4x20 PWM. This premium quiet fan is specifically engineered for tight spaces, measuring just 40x40x20 mm, making it the ideal solution for 1U servers, network equipment, and storage devices like routers, switches, and NAS units. It also works effectively in DVRs and other small form-factor electronics where space is at a premium. The fan features an award-winning A-series design that includes Flow Acceleration Channels and an Advanced Acoustic Optimisation frame. These elements work together to deliver superior cooling performance while maintaining extremely low noise levels, with a maximum sound pressure of only 14.9 dB(A). The 4-pin PWM interface allows for automatic speed control via compatible fan headers, ensuring your system adjusts cooling based on real-time needs without manual intervention. You can run it at its full 5000 RPM maximum speed or reduce it to 4400 RPM using the supplied Low-Noise Adaptor for even quieter operation. Built for long-term reliability, this fan boasts a mean time to failure (MTTF) of over 150,000 hours. The package includes essential accessories to simplify installation, such as anti-vibration mounts, fan screws, an extension cable, a Y-cable, and an OMM cable. Whether you are upgrading an old server or building a silent home lab, the Noctua NF-A4x20 PWM offers a perfect balance of airflow, silence, and durability.