to your specified address. |
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Have your parcel delivered by DPD to your specified address. Receive SMS with one-hour delivery windowWeekend, timed and European delivery options are available at checkout
Collect from our Bolton store, BL6 6PE |
Order online, collect from our Bolton store (25-28 Enterprise Park, Middlebrook, Horwich, Bolton, BL6 6PE)
UPS and DPD Pickup Pickup from local convenience store |
Collect your parcel from your newsagents, petrol stations and convenience stores
Protect against installation damage for 28 days.
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.
40 x 20mm quiet PC cooling fan
Supports fully automatic PWM speed control
Perfect for proprietary cooling
From 5.5 CFM, 14.9 dBA at 5000 RPM
After the success of Noctua's NF-A4x10 40mm fans we are delighted to offer the 20mm wide version that offers increased static pressure performance.
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 40 x 20mm. 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.
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.
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-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.
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
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 (PWM, ±20%) 1200 RPM
Airflow 5.5 CFM
Airflow with L.N.A. 4.9 CFM
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
Max. Input Power 0.6 W
Max. Input Current 0.05 A
Voltage 12 V
Voltage PWM signal 5 V
MTBF > 150,000 h
Accessories Low-Noise Adaptor (L.N.A.), 4-pin y-cable, 30cm extension cable, OmniJoin adaptor set, NA-AV3 anti-vibration mounts and Fan screws
Warranty 72 months
EAN barcode 9010018100105
|Individual Fan Specifications|
|Sound Level (dBA)|
|Sound Level (Sone)|
|Manual Speed Controller||No|
Please note your statutory rights are not affected.
For further information regarding Scan's warranty procedure please see our terms and conditions
- 60 months
- Return to base
- DOA Period:
- 7 days
- RTB Period:
- 60 months