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Black 120mm case fan with all-black frame and blades, 25mm thick, fluid dynamic bearing

be quiet!

be quiet! BL092 Silent Wings 4 120mm case fan

SKU CH-Q1Y7-9X4EF MPN BL092

A 120 mm case fan delivering 40-45 CFM airflow at 15-20 dBA with a fluid-dynamic bearing rated for 300000 hours

  • Fan Counts1 Fan
  • Fan ControllerNo Controller
  • TypeCase Fan
  • CompatibilityCase
  • Fan Size120mm
  • Fan Thickness25mm

Option 120mm

Struck-through versions exist but are not stocked here.

Color Black

  • Virtually inaudible at 15-20 dBA noise level
  • High airflow of 40-45 CFM for effective cooling
  • Fluid-dynamic bearing reduces vibration for smooth operation
  • Up to 300,000 hours lifespan for long-term reliability
  • Anti-vibration mounting with push pins and screws included

Silent Wings 4 120mm case fan

The be quiet! Silent Wings 4 is a 120mm case fan built for silent operation and strong static pressure. Its fluid-dynamic bearing and six-pole motor keep vibration to a minimum while delivering up to 45 CFM of airflow. The all-black frame and premium sticker suit clean, professional builds.

Three-pin voltage control limits

The fan connects via a standard three-pin power connector, so speed is regulated by voltage rather than PWM. This means the motherboard or fan controller must support voltage-based adjustment to reach the full 1600 RPM range. Without voltage control the fan will run at a fixed speed, reducing flexibility for quiet or high-performance profiles.

Check mounting and header type

Verify your case or radiator accepts 120mm fans with a 25mm thickness and standard screw or push-pin holes. Confirm the motherboard or controller provides a three-pin header capable of voltage regulation if you want variable speed. Builds that require PWM control or a different connector will not match this fan.

Highlights

  • Virtually inaudible at 15-20 dBA noise level
  • High airflow of 40-45 CFM for effective cooling
  • Fluid-dynamic bearing reduces vibration for smooth operation
  • Up to 300,000 hours lifespan for long-term reliability
  • Anti-vibration mounting with push pins and screws included

Specifications

Brandbe quiet!
SeriesSILENT WINGS 4
Fan Counts1 Fan
Fan ControllerNo Controller
TypeCase Fan
CompatibilityCase
Fan Size120mm
Fan Thickness25mm
Bearing TypeFluid Dynamic
RPM<1600 RPM
Air Flow40-45 CFM
Noise Level15 - 20 dBA
Power Connector3 Pin
ColorBlack
Shipping weight0.35 kg
Package size192 × 141 × 30 mm

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Questions about this item

Should I choose the 120mm size or a different fan diameter for my case?

This model is only offered in a 120mm diameter with 25mm thickness, so you need a case or radiator that accepts that exact footprint.

What does the 15 to 20 dBA noise range mean when the fan is running inside my PC?

At typical speeds the fan operates between 15 and 20 dBA, which is virtually inaudible in a closed case and stays quiet even under load.

The fan uses a 3-pin power connector — does that limit speed control compared to 4-pin PWM?

A 3-pin connector allows voltage-based speed control up to 1600 RPM, but it does not support PWM signalling for finer automatic curves.

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