Scan code: LN82073 Manufacturer code: NF-A4x20 5V

Noctua NF-A4x20 5V PWM 40mm x 20mm 4-pin PWM Fan

40mm Noctua NF-A4x20 5V PWM 40mm x 20mm 4-pin PWM Fan

Thumbnail 1 : Noctua NF-A4x20 5V PWM 40mm x 20mm 4-pin PWM Fan
Noctua NF-A4x20 5V PWM 40mm x 20mm 4-pin PWM Fan : image 1
Scan code: LN82073 Manufacturer code: NF-A4x20 5V
£13.49
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ScanProtect
  • SCANPROTECT Protect against installation damage for 28 days. More info

    ScanProtect is an enhanced warranty specifically designed and offered by Scan to reduce the risk of any mishap or damage to components during installation.

    Our aim with ScanProtect is to encourage our customers to upgrade or build their own PC confidently. For a small additional fee our customers are provided with complete peace of mind.

Product Overview Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and an AAO frame, the NF-A4x20 5V PWM is a PWM enabled 5V variant of Noctua's highly optimised, premium quality quiet 40x20mm fan. The custom designed NE-FD3 PWM IC that integrates Smooth Commutation Drive technology and Noctua's 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 manufacturer's warranty, the NF-A4x20 5V PWM is a premium choice for demanding 5V applications that require PWM control.
Features

40 x 20mm quiet PC cooling fan, 5V version
Supports fully automatic PWM speed control
Feature packed
Perfect for proprietary cooling
From 5.5 CFM, 14.9 dBA at 5000 RPM

PLEASE NOTE: 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.
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.
5V PWM version

Many devices such as network or storage solutions use 5 volt 40mm fans with PWM speed control. With the same operating voltage, PWM support and the included OmniJoin™ adaptor set that makes it compatible with proprietary fan headers, the NF-A4x20 5V PWM is ideal for replacing noisy or broken 5V 40mm fans with PWM.
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.
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.
Custom-designed PWM IC with SCD

Supporting fully automatic PWM speed control, the fan uses Noctua's custom-designed NE-FD3 5V 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-A4x20 PWM is supplied with a (L.N.A.) that reduces the maximum fan speed from 5000 to 4400rpm. The L.N.A. can be used either to run the fan at a fixed speed of 4400rpm or to cap the maximum speed when using automatic PWM control.
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 a 4-pin y-cable allows the connection of a second fan to the same PWM fan header for automatic control.
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 manufacturer's warranty. Features Dimensions 40 x 40 x 20 mm
Screw hole spacings 32 mm
Connector 4-Pin PWM
Bearing SSO2
Blade Geometry A-Series with Flow Acceleration Channels
Frame Technology AAO (Advanced Acoustic Optimisation)
Rotational Speed (±10%) 5000 RPM
Min. Rotational Speed (PWM, ±20%) 1100 RPM
Airflow 5.5 CFM
Acoustical Noise 14.9 dB(A)
Static Pressure 2.26 mm H2O
Max. Input Power 0.5 W
Max. Input Current 0.1 A
Voltage 5 V
Voltage PWM signal 5 V
MTBF > 150,000 h
Accessories 4-pin y-cable, 30cm extension cable, OmniJoin adaptor set, NA-AV3 anti-vibration mounts and Fan screws
Warranty 72 months
Specifications
Pack Information
Edition  
Pack Type  
Includes  
Individual Fan Specifications
Fan Diameter  
Fan Depth  
Fan Speed  
Fan Blades  
PWM No
Fan Specialization  
Airflow  
Air Pressure  
Sound Level (dB)  
Sound Level (Sone)  
Motor Type  
Bearing Type  
Manual Speed Controller No
Material  
Fan Colour  
LED No
LED Colour  
MTBF  
Fan Fixing  
Cable length  
Connectors  
Warranty

Please note your statutory rights are not affected.

For further information regarding Scan's warranty procedure please see our terms and conditions

Details
Duration:
60 months
Type:
Return to base
DOA Period:
7 days
RTB Period:
60 months
Manufacturer Contact Details
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