Noctua NF-A4x10 PWM 40x10mm Premium Quiet Fan - 12V 4-Pin, 5000 RPM

Experience reliable, whisper-quiet cooling with Noctua's NF-A4x10 PWM fan. Designed for dense 1U servers, network switches, NAS units and other compact electronics, this 40 x 10 mm fan provides strong airflow while staying under 19.6 dB(A). The 4-pin PWM interface automatically matches fan speed to system temperature, delivering efficient cooling from 1000 up to 5000 RPM and reducing power consumption when full speed isn't needed. Installation is simple thanks to the included anti-vibration mounts and fan screws, which secure the unit and dampen vibration-induced noise. A Low-Noise Adaptor lets you cap the maximum speed at 3700 RPM for ultra-quiet operation in noise-sensitive environments. Built with Noctua's award-winning A-series design and Flow Acceleration Channels, the fan maintains high static pressure for effective heat removal in tight spaces. With a mean time between failures exceeding 150,000 hours, the NF-A4x10 PWM offers long-term reliability for industrial and commercial applications, ensuring your equipment stays cool and silent for years to come.