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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

  • Fan size40 mm
  • Bearing designSSO2
  • Rotational speed4,500 RPM
  • Airflow rate8.2 m³/h
  • Operating noise17.9 dBA
  • Power input connector3 Pin
  • 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.

How it compares

Measured against everything we stock in PC Cooling Fans, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 60% of the 8,339 comparable items (median $19.99).
Fan size 40 mm
Lower than about 90% of the 1,114 comparable items (median 120 mm).

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Specifications

Product
Brand nameNoctua
Model nameNF-A4 × 10-5 V
Product typeCase Fan
Performance
Rotational speed4,500 RPM
Airflow rate8.2 m³/h
Power
Power input connector3 Pin
Size & build
Fan size40 mm
Bearing designSSO2
Product dimensions40 × 40 × 10 mm
Environment & compliance
Operating noise17.9 dBA

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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