We are currently closed, But will be open shortly
Shopping Cart
Noctua NF-A4x20 40mm PWM Fan
(image for) Noctua NF-A4x20 40mm PWM Fan
(image for) Noctua NF-A4x20 40mm PWM Fan
(image for) Noctua NF-A4x20 40mm PWM Fan
(image for) Noctua NF-A4x20 40mm PWM Fan
  • In Stock: 10
  • Manufactured by: Noctua

Noctua NF-A4x20 40mm PWM Fan

$27.76
Product Overview Noctua NF-A4x20 40mm PWM Fan 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...

Air Pressure

2.26 mm H²O


Airflow

5.5 CFM


Bearing Type

SSO2


Cable Length

40 mm


Connectors

1 x 4-pin


Edition

Noctua NF-A4x20 PWM


Fan Colour

Beige/Brown


Fan Depth

20 mm


Fan Diameter

40mm


Fan Speed

5000 rpm


GTIN

9010018100105


LED

No


Manual Speed Controller

No


Manufacturer code

NF-A4x20 PWM


Model Number

NF-A4x20 PWM


MTBF

> 150,000 Hours


PWM

Yes


Sound Level (dBA)

14.9 dBA


Add to Cart:
  • Manufactured by: Noctua
  • This product was added to our catalog on .

Product Overview

Noctua NF-A4x20 40mm PWM Fan

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 ChannelsFlow Acceleration Channel

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 frameAAO 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 DesignStepped 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 MicrostructuresInner 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 PadsIntegrated 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 bearingSSO2 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 SCDCustom-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.


Stops at 0% PWMStops at 0% PWM

When the fan is set to 0% PWM duty cycle by the motherboard or PWM fan controller, it will stop. This makes it ideal for creating setups with semi-passive cooling that automatically turn the fans off and thus run completely silent at idle if thermals allow.


Low-Noise AdaptorLow-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 setOmniJoin™ 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 optionsExtensive 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 warranty6-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.

 

There are currently no product reviews.

Features

• Award-winning A-series design with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance
• 40x20mm size ideal for 1U servers or replacing fans in network and storage equipment (routers, switches, NAS etc.) or other devices such as DVRs
• 4-pin PWM version for automatic speed control via 4-pin PWM fan headers, 5000rpm maximum speed (4400rpm with supplied Low-Noise Adaptor)
• Includes anti-vibration mounts, fan screws, extension cable and OmniJoin adaptor set for connecting the fan to proprietary fan headers

Air Pressure

2.26 mm H²O


Airflow

5.5 CFM


Bearing Type

SSO2


Cable Length

40 mm


Connectors

1 x 4-pin


Edition

Noctua NF-A4x20 PWM


Fan Colour

Beige/Brown


Fan Depth

20 mm


Fan Diameter

40mm


Fan Speed

5000 rpm


GTIN

9010018100105


LED

No


Manual Speed Controller

No


Manufacturer code

NF-A4x20 PWM


Model Number

NF-A4x20 PWM


MTBF

> 150,000 Hours


PWM

Yes


Sound Level (dBA)

14.9 dBA


Back to Top