This auction is for 1 PC -  Noctua 40 x 40 x 20 Fan

Condition
+ New
+ In Original Retail package

Specifications

Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua's AAO frame, the NF-A4x20 is a highly optimised, premium-quality quiet fan in size 40x20mm. The PWM version sports Noctua's custom-designed NE-FD1 IC for fully automatic speed control via 4-pin fan headers and comes with a Low-Noise Adaptor as well as an OmniJoin Adaptor Set for easy connection to proprietary fan headers. Its superb running smoothness, reference-class SSO2 bearing and Noctua's trusted premium quality make it an elite choice for the highest demands.


 

40x20mm size

Compared to Noctua's 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. 
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. 
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. 
Scope of delivery
  • NA-RC7 Low-Noise Adaptor (L.N.A)
  • NA-YC1 4-pin PWM y-cable
  • NA-EC1 30cm extension cable
  • OmniJoin adaptor set
  • 4x NA-AV3 anti-vibration mounts
  • Fan screws
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.

 


AN Specification
Size
 
40x40x20 mm
Mounting hole spacing
 
32x32 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%)
 
5000 RPM
Rotational speed with L.N.A. (+/- 10%)
 
4400 RPM
Min. rotational speed @ 20% PWM (+/-20%)
 
1200 RPM
Airflow
 
9,4 m³/h
Airflow with L.N.A.
 
8,3 m³/h
Acoustical noise
 
14,9 dB(A)
Acoustical noise with L.N.A.
 
12,2 dB(A)
Static pressure
 
2,26 mm H₂O
Static pressure with L.N.A.
 
1,75 mm H₂O
Input power (max.)
 
0,6 W
Input current (max.)
 
0,05 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
  • OmniJoin™ adaptor set
  • NA-AV3 anti-vibration mounts
  • Fan screws
Warranty
 
6 years

Model
BrandNoctua
ModelNF-A4x20 PWM
Details
Fan Counts1 Fan
Fan ControllerNo Controller
TypeCase Fan
CompatibilityCase
Fan Size40mm
Bearing Type SSO2
RPM Rotational Speed (+/- 10%) 5000 RPM, with L.N.A. (+/- 10%) 4400 RPM, Min. Rotational Speed (PWM, +/-20%) 1200 RPM
Air Flow Airflow 9,4 m³/h, with L.N.A. 8,3 m³/h
Noise LevelAcoustical Noise 14,9 dB(A), with L.N.A. 12,2 dB(A)
Power Connector4 Pin
ColorBrown
LED No
Features
Features3 to 2-pin Adaptor and polarity protection, Flow Acceleration Channels, AAO Frame, Stepped Inlet Design, Inner Surface Microstructures, Integrated Anti-Vibration Pads, Custom designed PWM IC with SCD, SSO2 Bearing, OmniJoin Adaptor Set
Dimensions & Weight
Dimensions40 x 40 x 20mm
Package Contents
Package ContentsLow-Noise Adaptor (L.N.A.), 4-pin y-cable, 30cm extension cable, OmniJoin™ adaptor set, NA-AV3 anti-vibration mounts, Fan screws