All stock codes associated to this product
NF-A4x20-FLX, NFA4x20FLX
Overview
Featuring advanced aerodynamic design measures such as Flow
Acceleration Channels and Noctuas 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 Noctuas trusted premium
quality make it an elite choice for the highest demands.
Details
40x20mm size
Compared to Noctuas 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.
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
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 mounting systems and fan clips used on heatsinks.
Smooth Commutation Drive 2
The latest version of Noctua's advanced Smooth Commutation Drive system
ensures superb running smoothness by eliminating torque variations and switching
noises. This makes the fan remarkably quiet even at very close distances.
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.
3 speed settings for full flexibility
Providing 5000, 4400 and 3700 rpm speed settings via the supplied Low-Noise
and Ultra-Low-Noise Adapters, the NF-A4x20 FLX (Flexibility) can be fine-tuned
for superior airflow or maximum quietness.
OmniJoin™ adaptor set
Many devices featuring 40mm fans use proprietary fan headers, so the NF-A4x20
comes with Noctua's OmniJoin adaptor set. Just cut the original fan's cable, fix
it to the adaptor using the supplied 3M Scotchlok 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 the supplied 3:4 pin adaptor allows
the connection of the fan directly to the power supply.
6-year manufacturer’s warranty
Noctua fans are renowned for their impeccable quality and outstanding
longevity. Like all Noctua fans, the NF-A4x20 features an MTTF of more than
150.000 hours rating and comes with a full 6-year manufacturers warranty.
Specifications
FAN |
|
Size |
40x40x20 mm |
Mounting hole spacing |
32x32 mm |
Connector |
3-Pin |
Bearing |
SSO2 |
Blade Geometry |
A-Series with Flow Acceleration Channels |
Frame Technology |
AAO (Advanced Acoustic Optimisation) |
Rotational Speed (+/- 10%) |
5000 RPM |
Rotational Speed with L.N.A. (+/- 10%) |
4400 RPM |
Rotational Speed with U.L.N.A. (+/- 10%) |
3700 RPM |
Airflow |
9,4 m/h |
Airflow with L.N.A. |
8,3 m/h |
Airflow with U.L.N.A. |
6,9 m/h |
Acoustical Noise |
14,9 dB(A) |
Acoustical Noise with L.N.A. |
12,2 dB(A) |
Acoustical Noise with U.L.N.A. |
8,5 dB(A) |
Static Pressure |
2,26 mm HO |
Static Pressure with L.N.A. |
1,75 mm HO |
Acoustical Noise with U.L.N.A. |
8,5 dB(A) |
Max. Input Power |
0,6 W |
Max. Input Current |
0,05 A |
Voltage |
12 V |
MTTF |
> 150.000 h |
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 |
Warranty |
6 years |