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Black 120mm PWM case fan with all-black frame and blades, fluid-dynamic bearing, anti-vibration push pins included

be quiet!

be quiet! BL093 Silent Wings 4 120mm PWM case fan

SKU CH-EJK4-69B7K MPN BL093

A 120 mm PWM case fan with fluid-dynamic bearing that runs up to 1600 RPM, delivers 48.7 CFM and stays between 15 and 20 dBA

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

Option 120mm PWM

Struck-through versions exist but are not stocked here.

Color Black

  • Virtually silent 15–20 dBA operation backed by fluid-dynamic bearing
  • High 48.7 CFM airflow from optimised blades and funnel frame
  • Anti-vibration push-pin and screw mounting reduces case resonance
  • 300,000-hour rated lifespan with 6-pole motor smoothness
  • All-black 120 mm design fits any build aesthetic

Silent Wings 4 120mm PWM Fan

The be quiet! Silent Wings 4 is a 120mm PWM case fan built for silent cooling in desktop PCs. It uses a fluid-dynamic bearing and a six-pole motor to reach 1600 RPM while keeping noise between 15 and 20 dBA. Airflow is rated at 48.7 CFM through a 25mm thick black frame. The fan connects via a standard 4-pin PWM header for automatic speed control.

Builders who need quiet cooling on heatsinks

This fan suits users who want low noise without giving up static pressure for dense fin stacks. The funnel-shaped frame and small tip clearance raise pressure for restrictive layouts. Buyers who need a bundled fan controller or multi-pack kits should look elsewhere because the package contains only the single fan and mounting hardware.

300,000-hour rated lifespan

The manufacturer rates the bearing and motor for up to 300,000 hours of continuous operation. That figure reflects the fluid-dynamic bearing and six-pole motor design. Anti-vibration push pins and screw holes are included for either mounting method.

Highlights

  • Virtually silent 15–20 dBA operation backed by fluid-dynamic bearing
  • High 48.7 CFM airflow from optimised blades and funnel frame
  • Anti-vibration push-pin and screw mounting reduces case resonance
  • 300,000-hour rated lifespan with 6-pole motor smoothness
  • All-black 120 mm design fits any build aesthetic

Specifications

SeriesSILENT WINGS 4
Model120mm PWM
Fan Counts1 Fan
Fan ControllerNo Controller
TypeCase Fan
CompatibilityCase
Fan Size120mm
Fan Thickness25mm
Bearing TypeFluid Dynamic
RPM<1600 RPM
Air Flow48.7 CFM
Noise Level15 - 20 dBA
Power Connector4 Pin
ColorBlack
Shipping weight0.34 kg
Package size192 × 141 × 30 mm

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Questions about this item

How often will the fluid-dynamic bearing need replacement?

The bearing is rated for up to 300,000 hours of operation, so routine replacement is not expected during normal use.

What limits continuous airflow at maximum speed?

At 1600 RPM the fan delivers 48.7 CFM; the motor will not exceed that RPM, so airflow caps there.

What noise and heat should I expect during all-day operation?

Noise stays between 15 and 20 dBA at regular speed; the 6-pole motor and fluid-dynamic bearing keep vibration and heat low.

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