Noctua NF A4x20 5V PWM, Premium Quiet Fan, 4 Pin, Version (40x20mm, Brown)

Noctua Nf-a4x20 5v Pwm 40 Mm Fan. Upgrade your compact devices with the ultra-quiet Noctua NF-A4x20 5V PWM fan. This premium 40x20mm fan delivers powerful cooling with minimal noise thanks to its advanced aerodynamic design and legendary SSO2 bearing. Perfect for replacing loud 5V fans in network gear or storage solutions, it offers precise PWM speed control for whisper-quiet operation. The included OmniJoin™ adaptor set ensures easy installation with proprietary connectors, making this the ultimate choice for silent, reliable performance in any 5V application. Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and an AAO frame, the NF-A4x20 5V PWM is a PWM enabled 5V variant of Noctua's highly optimised, premium quality quiet 40x20mm fan. The custom designed NE-FD3 PWM IC that integrates Smooth Commutation Drive technology and Noctua's reference class SSO2 bearings guarantee superb running smoothness and excellent long-term stability. Topped off with modular cabling, the OmniJoin™ Adaptor Set and the NF-A4x20 5V PWM is a premium choice for demanding 5V applications that require PWM control.Specifications:- Size: 40x40x20 mm- Mounting hole spacing: 32x32 mm- Connector & pin-configuration: 4-pin PWM- Cable length: 20cm + 30cm NA-EC1 extension cable- Bearing: SSO2- Blade geometry: A-Series with Flow Acceleration Channels- Frame technology: AAO (Advanced Acoustic Optimisation)- Rotational speed (+/- 10%): 5000 RPM- Min. rotational speed 20% PWM (+/-20%): 1100 RPM- Airflow: 9,4 m³/h- Acoustical noise: 14,9 dB(A)- Static pressure: 2,26 mm H₂O- Input power (typical): 0,42 W- Input power (max.): 0,5 W- Input current (typical): 0,08 A- Max. input current: 0,1 A- Operating voltage: 5 V- Voltage PWM signal: 5 V- MTTF: > 150.000 hScope of delivery:- 4-pin y-cable- 30cm extension cable- OmniJoin™ adaptor set- NA-AV3 anti-vibration mounts- Fan screwsTechnology: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.5V PWM version:- Many devices such as network or storage solutions use 5 volt 40mm fans with PWM speed control. With the same operating voltage, PWM support and the included OmniJoin™ adaptor set that makes it compatible with proprietary fan headers, the NF-A4x20 5V PWM is ideal for replacing noisy or broken 5V 40mm fans with PWM.Polarity protection:- As many devices using 5V fans feature proprietary connectors, and documentation of the pin alignment may not be available, the fan features an integrated diode for polarity protection. This way, you´re on the safe side if you accidentally connect it with reverse polarity.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.AAO frame:- Noctu´s AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctu´s proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fan´s performance/noise efficiency.Stepped Inlet Design:- Noctu´s Stepped Inlet Design adds turbulence to the influx in order to facilitate the transition from laminar flow to turbulent flow, which reduces tonal intake noise, improves flow attachment and increases suction capacity, especially in space-restricted environments.Inner Surface Microstructures:- With the tips of the fan blades ploughing through the boundary layer created by the Inner Surface Microstructures, flow separation from the suction side of the blades is significantly suppressed, which results in reduced blade passing noise and improved airflow and pressure efficiency.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.Custom-designed PWM IC with SCD:- Supporting fully automatic PWM speed control, the fan uses Noctu´s custom-designed NE-FD3 5V PWM IC that integrates Smooth Commutation Drive (SCD) technology. By providing smoother torque impulses, SCD suppresses PWM switching noises and thus makes the fan quieter at low speeds.OmniJoin™ adaptor set:- Many devices featuring 40mm fans use proprietary fan headers, so the NF-A4x20 comes with Noctu´s OmniJoin™ adaptor set. Just cut the original fan´s cable, fix it to the adaptor using the supplied cable connectors and you can plug the NF-A4x20 to proprietary fan headers.Extensive cabling options:- The fan´s short 20cm primary cable minimises cable clutter in typical applications while the supplied 30cm extension provides extended reach when necessary. Both cables are fully sleeved and a 4-pin y-cable allows the connection of a second fan to the same PWM fan header for automatic control.SSO2 bearing:- The NF-A4x20 features the further optimised second generation of Noctu´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. tradeinn Techinn

Premium quiet fan, 40x40x20 mm, 5V, 4-pin PWM, max. 5000 RPM, max. 14.9 dB(A), >150,000 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 NVIDIA Jetson Nano, 1U applications or replacing fans in network and storage equipment (routers, switches, NAS etc.) or other devices such as DVRs 5V 4-pin PWM version (5000rpm maximum speed) for 5V applications with PWM control Includes anti-vibration mounts, fan screws, extension cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers