Noctua NF-A4x20 PWM Premium Fan

Noctua NF-A4x20 PWM Premium Fan Noctua-NF-A4X20-PWM Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua’s AAO frame, the NF-A4x20 PWM is a highly optimised, premium-qualityquiet 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-NoiseAdaptor as well as an OmniJoinTM Adaptor Set for easy connection to proprietary fan headers. Its superb running smoothness, reference-class SSO2 bearing and Noctua’strusted premium quality make it an elite choice for the highest demands. PRODUCT SPECIFICATIONS:  Dimensions: 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 Rotational speed with L.N.A. (+/- 10%): 4400 RPM Min. rotational speed @ 20% PWM (+/-20%): 1200 RPM Airflow: 9.4 m³/h Airflow with L.N.A.: 8.3 m³/h 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 Input Power (Max.): 0.6 W Input Current (Max.): 0.05 A Operating Voltage: 12 VDC Voltage PWM Signal: 5 VDC MTTF >: 150,000 Hours Scope of Delivery: Low-Noise Adaptor (L.N.A.) 4-pin y-cable 30cm extension cable OmniJoin™ adaptor set NA-AV3 anti-vibration mounts Fan screws Warranty: 6 years