The NF-A4x20 5V PWM is a premium quality, highly optimized, quiet 40 x 20mm fan with PWM control that uses advanced aerodynamic design measures such as Flow Acceleration Channels and Noctuas AAO frame system.
The NF-A4x20 5V PWM is a premium quality, highly optimized, quiet 40 x 20mm fan with PWM control that uses advanced aerodynamic design measures such as Flow Acceleration Channels and Noctuas AAO frame system.
The NF-A4x20 5V PWM is a premium quality, highly optimized, quiet 40 x 20mm fan with PWM control that uses advanced aerodynamic design measures such as Flow Acceleration Channels and Noctuas AAO frame system.
The NF-A4x20 5V PWM is a premium quality, highly optimized, quiet 40 x 20mm fan with PWM control that uses advanced aerodynamic design measures such as Flow Acceleration Channels and Noctuas AAO frame system.
Smooth Commutation Drive technology and SSO reference class bearings guarantee superb running smoothness and excellent long-term stability. Modular wiring, optimal control, low-noise adapter and 6-year manufacturers guarantee make the NF-A4x20 a premium solution for the highest demands.
The features of the Noctua NF-A4x20 5V PWM at a glance:
– Stylish brown makes for a noble look
– Premium fan with aerodynamic design
– Adjustable 5V version with low operating voltage
– Extremely low noise emission of max. 14.9 dB (A)
– High static pressure of up to 2.26 mm H2O
– High flow rate of max. 9.4 m³ / h
– Connection via 4-pin PWM
– Very high life expectancy of over 150,000 hours
– Long warranty: 6 years
– Small premium fan from Noctua
Small premium fan from Noctua
The PWM version differs from the conventional NF-A4x20 in the possibility of changing the speed via pulse width modulation independently of the voltage. The PWM model of the A4x20 is equipped with Noctuas specially designed NE-FD3 PWM IC for fully automatic speed control. Its performance-oriented maximum speed and the extensive options for speed control as well as the exceptional speed range make the NF-A4x20 5V PWM a top solution for users who want to achieve a perfect balance between excellent cooling performance and super smooth running – no matter whether on heat sinks or for case ventilation !
The impeller of the NF-A4x20 5V PWM is equipped with so-called Flow Acceleration Channels on the suction side. By accelerating airflow in the critical outer regions of the fan blades, suction-side vortex shedding is reduced, resulting in higher efficiency and lower turbulence-related noise emissions. The pressure and flow rate has been increased thanks to a double depth compared to the NF-A4x10, which makes the fan perfect for applications with higher air resistance.
Noctuas AAO (Advanced Acoustic Optimization) frames have integrated vibration buffers as well as a stepped inlet area (Stepped Inlet Design) and an inner surface microstructure (Inner Surface Microstructures), which enable even better performance/noise efficiency. The graduated inlet area of the stepped inlet design creates more turbulence in the inlet. This facilitates the transition from laminar to turbulent flow, which adheres better to the frame (flow attachment) and thus increases the suction capacity of the fan, especially where the suction area is limited.
The microstructure on the inside of the frame (Inner Surface Microstructures) creates a boundary layer through which the tips of the fan blades move. This reduces the flow separation from the suction side of the blade tips, resulting in a significant reduction in torsional noise and an increase in pressure and airflow efficiency. The anti-vibration pads made of extra-soft silicone reduce the transmission of the smallest vibrations and are also compatible with all standard screws and commercially available mounting systems or fan clips used with CPU coolers.
The latest, further developed version of Noctuas SCD drive system guarantees excellent running smoothness by eliminating torque fluctuations and switching noise. This makes the NF-A4x20 surprisingly quiet, even at close range. The NF-A4x20 is equipped with the further optimized second generation of Noctuas proven SSO bearing system. With SSO2, the rear magnet sits closer to the fan axis for even better stabilization, resulting in further improved precision and durability.
Noctuas fans are known for their impeccable quality and outstanding durability. Like all Noctua fans, the NF-A4x20 5V PWM has an MTBF specification of over 150,000 hours and comes with a full 6-year manufacturers guarantee.
Danger:As a 5V fan, the NF-A4x20 5V PWM cannot be operated with 12V! Operation on common 12V power sources such as fan connectors on PC mainboards will damage the fan.
Delivery:
4-pin cable Y
30 cm cable extension
OmniJoin adapter set
NA-AV3 Anti-vibration mountings
4 fan screws
Manufacturer Warranty 6 years
| General Specifications | |
|---|---|
| Format | 40 x 40 x 20 mm |
| Bearing Type | SSO2 Bearing |
| Blade Geometry | A Series with Flow Acceleration Channels |
| Connection | 4-Pin |
| Performance | |
| Speed (Max) | 5,000 RPM (±10%) |
| Speed (Min) | 1,100 RPM (±10%) |
| Airflow | 9.4 m³/h |
| Noise Level | 14.9 dB(A) |
| Static Pressure | 2.26 mmH₂O |
| Electrical & Durability | |
| Operating Voltage | 5 V |
| Max. Power Consumption | 0.5 W |
| Max. Current | 0.1 A |
| MTBF | > 150,000 hours |
£18.44£15.37 Inc VatEx Vat
