All stock codes associated to this product
NF-A20-PWM, NFA20PWM
Overview
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
Noctuas award-winning A-series to the increasingly popular 20cm form factor. The
PWM version uses Noctuas custom designed NE-FD1IC 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 Noctuas trusted premium quality make the NF-A20 an elite
choice for the highest demands.
Details
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 Noctuas award-winning A-series.
154mm, 110x180mm and 170mm hole spacing
In order to ensure broad compatibility with todays 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.
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.
6-year manufacturer's warranty
Noctua fans are renowned for their impeccable quality and outstanding
longevity. Like all Noctua fans, the NF-A20 features an MTTF of more than
150.000 hours rating and comes with a full 6-year manufacturers warranty.
Specifications
Size |
200x200x30 mm |
Mounting hole spacing |
154x154, 110x180, 170x170 mm |
Connector |
4-Pin PWM |
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 m/h |
Airflow with L.N.A. |
100,8 m/h |
Acoustical Noise |
18,1 dB(A) |
Acoustical Noise with L.N.A. |
10,7 dB(A) |
Static Pressure |
1,08 mm HO |
Static Pressure with L.N.A. |
0,51 mm HO |
Max. Input Power |
0,96 W |
Max. Input Current |
0,08 A |
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 |