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Noctua NF-A20 PWM 200mm 800RPM Fan

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(4/5) 1 review
200mm PWM Fan, 800RPM, 18.1dB(A), 6 Year Warranty
£30.95 (incl. VAT)
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EAN 9010018100013
The NF-A20 is a highly optimised, premium quality quiet 200mm fan. Featuring an AAO (Advanced Acoustic Optimisation) standard frame as well as sophisticated aerodynamic design measures such as Flow Acceleration Channels, the NF-A20 brings the renowned quiet cooling performance of Noctua’s award-winning A-series to the increasingly popular 20cm form factor. The PWM version uses Noctua’s custom designed NE-FD1 IC for fully automatic speed control via 4-pin fan headers, which allows it to strike a perfect balance between quietness and ventilation performance in each given situation. Its superb running smoothness, reference-class SSO2 bearing and Noctua’s trusted premium quality make the NF-A20 an elite choice for the highest demands.

Award-winning Noctua quality in 20cm size
While more and more PC cases support 20cm intake, side-panel or exhaust fans, many of the bundled stock units and available aftermarket options are of questionable quality. By contrast, the NF-A20 is a true premium grade solution worthy of Noctua’s award-winning A-series.

154mm, 110x180mm and 170mm hole spacing
In order to ensure broad compatibility with today’s PC cases, the NF-A20 features three sets of mounting holes: While the 154x154mm and 110x180mm spacing allow it to replace most 200mm fans, the 170x170mm spacing is used by many 230 and 250mm fans, which can thus also be replaced by the NF-A20.*

Flow Acceleration Channels
The NF-A20 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 screws and other mounting systems.

Custom-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.

Low-Noise Adaptor
The NF-A20 PWM is supplied with a (L.N.A.) that reduces the maximum fan speed from 800 to 550rpm. The L.N.A. can be used either to run the fan at a fixed speed of 550rpm or to cap the maximum speed when using automatic PWM control.

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.

SSO2 bearing
The NF-A20 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-A20 features an MTTF of more than 150.000 hours rating and comes with a full 6-year manufacturer’s warranty.

- Size: 200x200x30 mm
- Mounting hole spacing: 154x154, 110x180, 170x170 mm
- Connector: 4-Pin PWM
- Bearing: SSO2
- Blade Geometry: A-Series with Flow Acceleration Channels
- Frame Technology: AAO (Advanced Acoustic Optimisation)
- Rotational Speed: (+/- 10%) 800 RPM
- Rotational Speed with L.N.A:. (+/- 10%) 550 RPM
- Min. Rotational Speed: (PWM, +/-20%) 350 RPM
- Airflow: 146,9 m³/h
- Airflow with L.N.A.: 100,8 m³/h
- Acoustical Noise: 18,1 dB(A)
- Acoustical Noise with L.N.A.: 10,7 dB(A)
- Static Pressure: 1,08 mm H2O
- Static Pressure with L.N.A.: 0,51 mm H2O
- Max. Input Power: 0,96 W
- Max. Input Current: 0,08 A
- Voltage: 12 V
- Voltage PWM signal: 5 V
- MTTF: > 150.000 h

- Low-Noise Adaptor (L.N.A.)
- 4-pin y-cable
- 30cm extension cable
- NA-AV3 anti-vibration mounts
- NA-AV4 anti-vibration mounts
- Fan screws
- Warranty 6 years
Lighting No
Primary Colour Beige
Secondary Colour Brown
Fan Specifications
Fan Size 200 mm
Fan mounting size 200 mm
Min. Fan RPM 350 rpm
Max. Fan RPM 800 rpm
Min. Single Fan Airflow 100.8 m³/h
Max. Single Fan Airflow 146.9 m³/h
Min. Static Pressure 0.51 mH2O
Max. Static Pressure 1.08 mH2O
Length 200 mm
Width 200 mm
Fan height 30 mm
Min. Single Fan Noise dB(A) 10.7 dB(A)
Max. Single Fan Noise dB(A) 18.1 dB(A)
Power Specifications
Rated voltage 12 V
Starting voltage 12 V
Internal Ports
Fan connectors 4 Pin (PWM)
Add a Review

Geat performance. Interesting mount options.

by STEFAN HOLMES star_border star star star star

Noctua are legendary, but I've only recently started using their fans. A pair of 92mm for HD cooling, a 140mm for case cooling in an old workstation.I recently paired a GTX1070 with a microATX board in an Aerocool cube case. The case is circa 2013 with no proper dust filters, but it did come with a front 200mm fan, which is still a rarity. It is not a great fan. 550RPM max and noisy when it got there. It also wasn't good at shifting air.I bought the Noctua knowing that I was going to probably have a problem installing it. The existing 200mm fan was thin, with a skeletal outer frame. Clearance between the front of the chassis and the non-removable HD tray is limited.Fitting was a nightmare. I tried to use the pull-through silicone thingies. They broke.There was nowhere for the screws to go that matched any of the mount options. I managed to find a mount point, but the screw holes were too narrow.A drill and a 4.5mm bit made short work of that problem and the fan is performing very well. I can run it at 550RPM, the previous fan's top speed, with barely any noticable noise and with improved airflow.Impressed, but bear in mind that unless you have a versatile, modern case, you may need to get creative with your install.

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£30.95 (incl. VAT)
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