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be quiet! SILENT WINGS PRO 4 140 mm PWM fan, black

44.10 €
Products ID: 156420
In supplier warehouse Available to order: 7 pcs. Delivery Time 7–15 business days

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be quiet! SILENT WINGS PRO 4 is a 140 mm PWM fan for PC cases, radiators and heat sinks. Its Speed Switch selects between 3 maximum PWM speed settings, reaching up to 2400 rpm.

Airflow and speed control

Optimised blades, a small gap between the blades and frame, and funnel-shaped air outlets help build air pressure for radiator and heat-sink cooling. At 100% PWM and 12 V, airflow is 97.41 CFM and the noise level is 36.8 dB(A).

  • Speed selection: medium-speed, high-speed and ultra-high-speed maximum PWM settings.
  • Quiet operation: a 6-pole motor and fluid dynamic bearing support low-vibration running, with nearly inaudible operation at normal speeds.
  • Mounting options: push-pin and screw mounting for case, radiator or heat-sink use.
  • Connection: a 4-pin PWM connector and 50 cm sleeved cable.

The black plastic fan measures 140 × 140 × 25 mm and features a high-gloss fan sticker.


Dimensions (L × W × H)140 × 140 × 25 mm
Bearing technologyFDB (fluid dynamic bearing)
Connector4-pin PWM
Motor technology6-pole fan motor
Weight including connection cable258 g
Push-pin mountingYes
Screw mountingYes
Airflow at 100% PWM / 12 V97.41 CFM / 165.5 m³/h
Air pressure at 100% PWM / 12 V3.64 mm H₂O
Noise level at 100% PWM / 12 V36.8 dB(A)
Life expectancy at 25 °C300 000 hours
Voltage12 V
Maximum air pressure3.64 mm H₂O
Cable length50 cm
Fan diameter140 mm
Maximum noise level36.8 dB
Rated current0.5 A
Maximum airflow97.41 CFM
Rated power consumption6 W
Number of fans1
Height140 mm
ColourBlack
Width140 mm
Depth25 mm
Weight0.258 kg
MaterialPlastic
TypeAir cooling system
Cooling typeRadiator fan
Maximum rotational speed2400 rpm
Maximum PWM speed settingsMedium-speed, high-speed, ultra-high-speed
Cable finishSleeved
EAN4260052188910
Can this fan be used in a case and on a radiator?

Yes. It supports use as a case fan and on radiators and heat sinks, with push-pin and screw mounting options.

What does the Speed Switch adjust?

It selects the maximum PWM speed setting: medium-speed, high-speed or ultra-high-speed. The highest stated speed is 2400 rpm.