The Noctua NF-A4x20 5V is a high-end 40mm fan engineered for 5V environments such as embedded systems, network appliances, 3D printers, and USB-powered devices. Despite its ultra-compact size, it delivers impressive airflow and static pressure with minimal noise, thanks to Noctua’s refined AAO (Advanced Acoustic Optimization) frame, Flow Acceleration Channels, and the long-life SSO2 bearing.

Key Features:

5V operating voltage – ideal for embedded systems and USB-powered cooling

20mm thickness for added airflow and static pressure vs standard 10mm fans

SSO2 bearing ensures ultra-low noise and industry-grade durability

Flow Acceleration Channels and stepped inlet design for aerodynamic efficiency

OmniJoin™ adapter set for compatibility with proprietary fan headers

Specifications:

• Dimensions: 40 x 40 x 20 mm

• Voltage: 5V

• Connector: 3-pin

• Max Fan Speed: 5000 RPM

• Max Airflow: 9.4 m³/h

• Static Pressure: 2.26 mm H₂O

• Max Acoustics: 14.9 dB(A)

• Input Power: 0.4 W

• Current: 0.08 A

• Bearing Type: SSO2

• MTTF: >150,000 hours

Additional Features:

• Integrated polarity protection for safe embedded deployment

• Modular cabling: includes extension cable and OmniJoin™ adapter

• Suitable for 5V controllers, USB fan setups, and tight space cooling scenarios

• Excellent choice for Raspberry Pi, media centers, compact enclosures, or industrial control units

Customer Benefits:
The NF-A4x20 5V is the definitive ultra-quiet micro-fan for demanding low-voltage applications, combining premium performance with whisper-quiet operation, even under 24/7 use scenarios.

What’s in the Box:

• 1 × NF-A4x20 5V fan

• 4 × Fan screws

• 1 × 30cm extension cable

• 1 × OmniJoin™ adapter set

• Installation manual

Compliance:
Compliant with CE, RoHS, REACH, and WEEE. Engineered in Austria for long-term embedded reliability and near-silent cooling.

Manufacturer Contact:
Company Name: Noctua GmbH
Address: Josef-Preis-Allee 18, 8020 Graz, Austria
Email: support(at)noctua(dot)at