Noctua 40x40x20mm 5V 5000RPM PWM 4-Pin Fan NF-A4x20
840556077896
Upgrade your cooling performance with the Noctua NF-A4x20 5V PWM 40mm Fan, engineered for demanding applications that require efficient airflow, quiet operation, and long-term reliability. Designed with advanced aerodynamic features such as Flow Acceleration Channels and an AAO frame, this compact 40x40x20mm fan delivers exceptional static pressure and reduced noise, making it the perfect replacement for noisy or broken 5V fans in network devices, storage systems, and small form factor builds.
Equipped with PWM control for precise speed regulation and Noctua’s custom NE-FD3 PWM IC with Smooth Commutation Drive (SCD), this fan ensures quieter performance even at lower speeds. The SSO2 bearing system guarantees stability, durability, and a lifespan of over 150,000 hours—backed by a 6-year manufacturer’s warranty.
FAN SPECIFICATION:
Size: 40x40x20 mm
Mounting hole spacing: 32x32 mm
Connector & pin-configuration: 4-pin PWM
Cable length: 20cm + 30cm NA-EC1 extension cable
Bearing: SSO2
Blade geometry: A-Series with Flow Acceleration Channels
Frame technology: AAO (Advanced Acoustic Optimisation)
Rotational speed (+/- 10%): 5000 RPM
Min. rotational speed @ 20% PWM (+/-20%): 1100 RPM
Airflow: 9,4 m³/h
Acoustical noise: 14,9 dB(A)
Static pressure: 2,26 mm H₂O
Input power (typical): 0,42 W
Input power (max.): 0,5 W
Input current (typical): 0,08 A
Max. input current: 0,1 A
Operating voltage: 5 V
Voltage PWM signal: 5 V
MTTF: > 150.000 h
Scope of delivery:
4-pin y-cable
30cm extension cable
OmniJoin™ adaptor set
NA-AV3 anti-vibration mounts
Fan screws
Warranty: 6 years
