Noctua fan NF-A4x10 5V — 40×40×10 mm, 3-pin, 4500 RPM, 8.2 m³/h, 5 V

The Noctua NF-A4x10 5V is a compact 40×10 mm fan designed for efficient cooling in confined spaces. This dedicated 5V version of Noctua’s premium NF-A4x10 series features Flow Acceleration Channels and an AAO-standard frame to optimise airflow and reduce turbulence, while Smooth Commutation Drive technology and the SSO2 bearing ensure smooth rotation and long-term stability. The fan is supplied with modular cabling, the OmniJoin™ Adaptor Set and a selection of accessories for flexible installation.

Advantages

The NF-A4x10 5V combines high rotational speed with finely tuned aerodynamic measures to provide effective airflow (up to 8.2 m³/h) and a notable static pressure (up to 1.78 mmH2O) at 5V operation. Its SSO2 bearing and Smooth Commutation Drive reduce mechanical noise and wear, while the included OmniJoin™ and extension cable enable easy connection to various setups. The compact 40 mm diameter and 10 mm thickness make it suitable for tight mounting locations.

Suitable for (tasks / use cases)

• Cooling small form-factor PC cases
• Cooling compact electronics and embedded systems
• Replacement or upgrade for existing 5V fan mounts
• Applications requiring a compact, high-RPM 40 mm fan

Key specifications

• Model: Noctua NF-A4x10 5V (MPN: NF-A4x10 5V, EAN: 4716123315469)
• Size: 40 × 10 mm
• Rated voltage: 5 V
• Maximum speed: 4500 RPM
• Max airflow: 8.2 m³/h
• Max static pressure: 1.78 mmH2O
• Colours: Beige, Brown

How to use

Mount the fan in the intended 40×10 mm location using the supplied screws and vibration compensators to minimise transmission of mechanical noise. Use the included extension cable or OmniJoin™ Adaptor Set to connect the fan to a 5V supply or compatible motherboard header. Ensure the airflow direction matches your cooling layout and that the fan has adequate clearance for intake and exhaust. Do not operate the fan outside the specified voltage.

Recommendations

For reliable long-term performance, keep the fan and surrounding vents free of dust. Use the supplied vibration-compensators on metal or thin plastic mounts to reduce rattling. If replacing an existing fan, verify connector compatibility and voltage to avoid damage.