Noctua NF-A20 PWM Fan
The NF-A20 is a highly optimised, premium quality quiet 200mm fan. Featuring an AAO (Advanced Acoustic Optimisation) standard frame as well as sophisticated aerodynamic design measures such as Flow Acceleration Channels, the NF-A20 brings the renowned quiet cooling performance of Noctua’s award-winning A-series to the increasingly popular 20cm form factor. The PWM version uses Noctua’s custom designed NE-FD1 IC for fully automatic speed control via 4-pin fan headers, which allows it to strike a perfect balance between quietness and ventilation performance in each given situation. Its superb running smoothness, reference-class SSO2 bearing and Noctua’s trusted premium quality make the NF-A20 an elite choice for the highest demands.
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.
154mm, 110x180mm and 170mm hole spacing
In order to ensure broad compatibility with today’s PC cases, the NF-A20 features three sets of mounting holes: While the 154x154mm and 110x180mm spacing allow it to replace most 200mm fans, the 170x170mm spacing is used by many 230 and 250mm fans, which can thus also be replaced by the NF-A20.*
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.
| Specifications |
Noctua NF-A20 PWM Cooling Fan |
| Size |
200x200x30 mm |
| Mounting hole spacing |
154×154, 110×180, 170×170 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 (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 |
| Max. input power |
0,96 W |
| Max. input current |
 0,08 A |
| Operating voltage |
12 V |
| Voltage PWM signal |
5 V |
| MTTF |
> 150.000 h |
| Scope of delivery |
- Low-Noise Adaptor (L.N.A.)
- 4-pin y-cable
- 30cm extension cable
- NA-AV3 anti-vibration mounts
- NA-AV4 anti-vibration mounts
- Fan screws
|
| Warranty |
6 Years |
|
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| Similar Product |
NF-A14 PWM |
| Also Available Here |
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