be quiet! Silent Wings 4 PWM Fan, Fluid Dynamic Bearing, 140mm, Black

This 140mm cooling fan, finished in black, is engineered for high-demand applications that require a precise balance of low operating noise and effective thermal management. The design features optimized fan blades and a specific frame structure intended to generate high static pressure. This structure is particularly effective when the fan is mounted directly onto restrictive components such as radiators or dense heat sinks. The unit measures 140 mm wide by 140 mm deep with a 25 mm profile.

At its maximum operational speed of 1100 RPM, the fan delivers an airflow of 51.3 CFM and static pressure up to 0.92 mmH₂O, while maintaining a peak noise output of 13.6 dB. Longevity is addressed through the integration of a Fluid Dynamic Bearing (FDB) and a robust 6-pole fan motor, designed to reduce vibration and minimize friction compared to conventional assemblies. Speed is managed via a 4-pin Pulse Width Modulation (PWM) connector, enabling the system to dynamically adjust rotation based on thermal load. This mechanism contributes to a rated operational lifespan of 300,000 hours MTTF.

• Fan diameter is 140 millimeters
• Maximum rotational speed is 1100 RPM
• Airflow output measures 51.3 cubic feet per minute
• Features a 4-pin PWM speed control connector
• Utilizes a Fluid Dynamic Bearing for long-term reliability
• Rated power consumption is 3.6 watts
• Compatible with PC cases, radiators, and heat sinks
• Weight is 220 grams