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Small square 40mm fan, brown and beige frame, 10mm thick, three-pin connector

Noctua

Noctua NF-A4x10-5V 40mm 5V case fan

SKU CH-1WEQ-VGBWE

A 40mm 5V case fan delivering 8.2 m³/h airflow at 17.9 dBA with SSO2 bearing

  • TypeCase Fan
  • Fan Size40mm
  • Bearing TypeSSO2
  • RPM4500 RPM
  • Air Flow8.2 m³/h
  • Noise Level17.9 dBA
  • Compact 40mm form factor fits tight spaces
  • Low 17.9 dBA noise for quiet operation
  • 5V 3-pin connector powers directly from USB headers
  • SSO2 bearing rated beyond 150.000 hours MTBF
  • 78 mm H₂O static pressure drives airflow through restrictions

Dedicated 5V compact fan

The Noctua NF-A4x10-5V is a 40mm case fan built for 5V operation. It runs at 4500 RPM and delivers 8.2 m³/h of airflow with a static pressure of 1.78 mm H2O. The SSO2 bearing and Smooth Commutation Drive provide quiet performance at 17.9 dBA.

Buyers restricted to 5V headers

This fan suits systems that only offer a 5 volt three-pin header and need a low-profile 10mm frame. Builders who need higher airflow or PWM speed regulation will need a different model.

5V voltage requirement

The single specification that decides fit is the 5V operating voltage; the fan draws 0.05 A and 0.25 W from a three-pin connector. Confirm your board or controller supplies 5V before purchase.

Highlights

  • Compact 40mm form factor fits tight spaces
  • Low 17.9 dBA noise for quiet operation
  • 5V 3-pin connector powers directly from USB headers
  • SSO2 bearing rated beyond 150.000 hours MTBF
  • 78 mm H₂O static pressure drives airflow through restrictions

Specifications

BrandNoctua
ModelNF-A4x10-5V
TypeCase Fan
Fan Size40mm
Bearing TypeSSO2
RPM4500 RPM
Air Flow8.2 m³/h
Noise Level17.9 dBA
Power Connector3 Pin
FeaturesStatic Pressure: 1.78 mm H2O
Max. Input Power: 0.25 W
Max. Input Current: 0.05 A
Voltage: 5 V
MTBF: > 150.000 h
Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and an AAO standard frame, the NF-A4x10 5V is a dedicated 5V version of Noctua's highly optimised, premium quality quiet 40 x 10mm fan. Smooth Commutation Drive technology and Noctua's reference class SSO2 bearing guarantee superb running smoothness and excellent long-term stability.
Dimensions40 x 40 x 10 mm

Questions about this item

What does the 3-pin 5V connector limit for speed control?

The 3-pin 5V connector allows voltage-based speed regulation but lacks a PWM wire for duty-cycle control.

What clearance does the 40 x 40 x 10 mm frame require?

It needs a 40 mm square mounting hole pattern and 10 mm depth behind the frame for the motor body.

How is the fan secured and which orientation step is often missed?

Four corner screws hold the 40 mm frame; the airflow arrow on the frame must point toward the heatsink or exhaust path.

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