Noctua NF-A20 PWM 200x200x30mm

 

Award-winning Noctua quality in 20cm size

While more and more PC cases support 20cm intake, side-panel or exhaust fans, many of the bundled stock units and available aftermarket options are of questionable quality. By contrast, the NF-A20 is a true premium grade solution worthy of Noctua’s award-winning A-series.

Flow Acceleration Channels

The NF-A20 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

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.

Stepped Inlet Design

Noctua'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 screws and other mounting systems.

Custom-designed PWM IC with SCD

Supporting fully automatic PWM speed control, the fan uses Noctua's custom-designed NE-FD1 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.

Low-Noise Adaptor

The NF-A20 PWM is supplied with a (L. N. A. ) that reduces the maximum fan speed from 800 to 550rpm. The L. N. A. can be used either to run the fan at a fixed speed of 550rpm or to cap the maximum speed when using automatic PWM control.

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-A20 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.

 

 

SPECIFICATIONS

FAN Specification

Size:  200x200x30 mm

Mounting hole spacing:  154x154, 110x180, 170x170 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%) :   800 RPM

Rotational speed with L. N. A. (+/- 10%) :   550 RPM

Min. rotational speed @ 20% PWM (+/-20%) :   350 RPM

Airflow :   146,9 m³/h

Airflow with L. N. A. :   100,8 m³/h

Acoustical noise :   18,1 dB(A)

Acoustical noise with L. N. A. :   10,7 dB(A)

Static pressure :   1,08 mm H₂O

Static pressure with L. N. A. :   0,51 mm H₂O

Input power (typical) :   0,82 W

Input power (max. ) :   0,96 W

Input current (typical) :   0,07 A

Max. input current :   0,08 A

Operating voltage :   12 V

Voltage PWM signal :   5 V

MTTF > 150.000 h