All stock codes associated to this product
NF-A4X20-5V, NFA4X205V
Overview
Featuring advanced aerodynamic design measures such as Flow
Acceleration Channels and Noctuas AAO frame, the
NF-A4x20 5V is a dedicated 5V version of Noctuas highly optimised, premium
quality quiet 40x20mm fan.Smooth Commutation Drive technology
and Noctuas reference class SSO2 bearings guarantee superb
running smoothness and excellent long-term stability. Topped off with modular
cabling, the OmniJoin Adaptor Set and 6 years manufacturers
warranty, the NF-A4x20 5V is a premium choice for demanding 5V applications.
Being a 5V fan, the NF-A4x20 5V cannot be run at 12V and will be damaged when
used with typical 12V power sources such as PC motherboard fan headers.
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.
5V version
Many devices such as network or storage solutions use 5-volt 40mm fans. With
the same operating voltage and the included OmniJoin Adaptor Set that makes it
compatible with proprietary fan headers, the NF-A4x20 5V is ideal for replacing
noisy or broken 5V 40mm fans.
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
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.
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!
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.
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
GENERAL |
|
Notes and warnings |
Being a 5V fan, the NF-A4x20 5V PWM cannot be run at 12V and will be
damaged when used with typical 12V power sources such as PC motherboard
fan headers. |
|
|
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 |
Airflow |
9,4 m/h |
Acoustical Noise |
14,9 dB(A) |
Static Pressure |
2,26 mm HO |
Max. Input Power |
0,5 W |
Max. Input Current |
0,1 A |
Voltage |
5 V |
MTTF |
> 150.000 h |
Scope of Delivery |
30cm extension cable |
|
OmniJoin adaptor set |
|
NA-AV3 anti-vibration mounts |
|
Fan screws |
Warranty |
6 years |