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

Brand: Noctua

Noctua NF-A4x20 FLX Premium Quiet Fan 3-Pin (40x20mm Brown)
Product Description

Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua’s AAO frame the NF-A4x20 is a highly optimised premium-quality quiet fan in size 40x20mm. The FLX version provides 5000/4400/3700rpm speed settings via the supplied Low-Noise Adaptors and includes the OmniJoin Adaptor Set for easy connection to proprietary fan headers. Its superb running smoothness reference-class SSO2 bearing and Noctua’s trusted premium quality make it an elite choice for the highest demands.

^{40x20mm size}

Compared to Noctua’s award-winning NF-A4x10 the NF-A4x20 is twice as thick which allows for increased static pressure performance and makes the NF-A4x20 ideal for demanding applications with high flow resistance.

Read more ^{Flow Acceleration Channels}

The NF-A4x20 impeller features suction side Flow Acceleration Channels. By speeding up the airflow at the crucial outer blade regions this measure reduces suction side flow separation and thus leads to better efficiency and lower vortex noise.

^{SSO2 Bearing}

The NF-A4x20 features the further optimised second generation of Noctua's renowned time-tested SSO bearing. With SSO2 the rear magnet is placed closer to the axis to provide even better stabilisation precision and durability.

^{Integrated Anti-Vibration Pads}

Integrated Anti-Vibration Pads made from extra-soft silicone minimise the transmission of minute vibrations while maintaining full compatibility with all standard mounting systems and fan clips used on heatsinks.

^{Scope of delivery}

• Low-Noise Adaptor (L.N.A.)
• Ultra-Low-Noise Adaptor (U.L.N.A.)
• 30cm extension cable
• OmniJoin adaptor set
• NA-AV3 anti-vibration mounts
• Fan screws

Read more ^{AAO frame}

Noctua's AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctua's proprietary Stepped Inlet Design and Inner Surface Microstructures both of which further refine the fan's performance/noise efficiency.

Read more NF-A4x20 PWM NF-A4x20 FLX NF-A4x20 5V PWM NF-A4x20 5V Connector 12 V 12 V 5V 5V Voltage 4-pin PWM 3-pin 4-pin PWM 3-pin RPM: Max: 5000 / Min: 1 Max: 5000 / Min: 1 RPM with L.N.A. 4 - - RPM with U.L.N.A. - 3700 - - Acoustical Noise 149 dB(A) 149 dB(A) 149 dB(A) 149 dB(A) Acoustical Noise with L.N.A. 122 dB(A) 122 dB(A) - - Acoustical Noise with U.L.N.A. - 85 dB(A) - - Size 40x40x20 mm 40x40x20 mm 40x40x20 mm 40x40x20 mm

• Premium quiet fan 40x40x20 mm 12V 3-pin Molex 5000/4400/370 RPM max. 14.9 dB(A) >150000 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