Noctua NF-A4X20-5V Case Fan, 40 x 40 x 20 mm, 5V, Beige/Brown

The Noctua NF-A4X20-5V is a 40mm fan engineered for 5V applications, distinguishing it from standard 12V case fans. Its 40x40x20mm dimensions make it suitable for space-constrained environments such as 1U servers, network devices, or other compact electronic enclosures where active cooling is required. This model directly addresses the need for a cooling solution in systems that provide a 5V power source for fans via a 3-pin header. The frame is constructed from PBT, and the impeller is made from PP materials.

This fan's design balances airflow and acoustics for its intended use cases. It operates at a maximum rotational speed of 5000 RPM, producing an airflow of 5.53 CFM and a static pressure of 2.26 mmH2O. The fan incorporates Noctua's SSO2 bearing, a self-stabilizing oil-pressure system intended for operational stability and longevity. At its highest speed, the acoustic output is rated at 14.9 dB. The package includes an OmniJoin adaptor set for compatibility with proprietary connectors and anti-vibration mounts to help minimize operational noise.

• Compact 40 x 40 x 20 mm frame size
• Designed for dedicated 5V power sources
• Equipped with a long-lifespan SSO2 bearing
• Connects using a standard 3-pin fan connector
• Includes an OmniJoin adaptor set for versatile connectivity
• Comes with anti-vibration mounts to reduce noise
• Supplied with a 30cm extension cable