Article number: BL095

“We are proud of our Silent Wings 4 for being the most silent fans of be quiet! Especially with their sheer performance in mind even we are still baffled about how quiet these fans are.” 

Marius Sabisz, Head of BU Cooling



No compromise silence and performance

Silent Wings 4 140mm combines all features of a virtually inaudible with an extremely performant fan for the most demanding applications.

  • Optimized fan blades for the highest performance 
  • Small tip clearance and a fan frame with funnel-shaped air outlets for extremely high air pressure
  • Virtually inaudible operation at regular speed
  • 6-pole fan motor and fluid-dynamic bearing for less vibration and very smooth operations
  • Anti-vibration mounting with push pins and screwed installation option
  • Super-long lifespan of up to 300,000h
  • Elegant look with high-grade fan sticker in an all-black design
  • 5-year manufacturer warranty
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Equally quiet and performant operation

Silent Wings 4 140mm is the fan of choice for all possible operations. Be it in a case, on radiators or heat sinks – Features like the silence-optimized fan blades and the funnel shaped fan frame make Silent Wings 4 140mm a fan that makes no compromises between virtually inaudible operation and
high performance.


Minimum tolerances for maximum air pressure

Silent Wings 4 140mm makes for extraordinary air pressure and, therefore, significant increases in the system’s performance. The decreased distance between the fan blades and the frame makes it possible. By that, the Silent Wings 4 140mm allows the user to run even the most
demanding applications.


For any purpose

Silent Wings 4 140mm has 2 mounting options in the scope of delivery. The pre-installed anti-vibration mounting reduces noise-generating vibrations to a minimum. For radiators and heat sinks, the plastic mounting is the first choice. Both solutions have in common that they enable virtually inaudible operation at regular speed.


The key for virtually inaudible operation when needed

6-pole fan motor with 3 phases for very low power consumption, less vibration and therefore quiet max. operation of 13.6dB(A). Equipped with this state-of-the-art technology the fan is virtually inaudible when operated
in mid-speed.


For a sustainable operation

The advanced fluid-dynamic bearing (FDB) enables a super long fan life of up to 300,000 hours. In addition, it reduces the vibrations significantly and supports the virtually inaudible operation of Silent Wings 4 140mm.


Magnificent appearance from all angles

Be it as a radiator fan or in the case: Silent Wings 4 140mm always makes a good impression. The all-black design combined with the high-grade fan sticker makes the fan shine in any system. This makes Silent Wings 4 140mm a high performant and an incredibly good-looking fan.

All models at a glance:

Product Series

General data

ModelSilent Wings 4 140mm
Dimensions (mm)140
Color optionBlack
Fan speed @ 100% PWM / 12V (rpm)1100
Noise level @ 100% PWM / 12V (dB(A))13.6
Air Flow @ 100% PWM / 12V (CFM / m3/h)51.3 / 87.16
Air Pressure @ 100% PWM / 12V (mm H2O)0.92


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Mechanical specifications

Dimensions (L x W x H), (mm)140 x 140 x 25
Weight incl. fixed cables (g)220
Bearing technologyFDB
Motor technology6-pole fan motor
Push pin fixing
Screw fixing

Cables / Connectors

Daisy-chain compatible-
Lighting connector-
Cable length (mm)500
Cable sleeve

Performance / Noise

Air Flow @ 100% PWM / 12V (CFM / m3/h)51.3 / 87.16
Air Pressure @ 100% PWM / 12V (mm H2O)0.92
Noise level @ 100% PWM / 12V (dB(A))13.6
Lifespan (h / 25°C)300,000

Electrical specifications

Rated Voltage DC (V)12
Operating Voltage DC (V)5 - 13.2
Current consumption (A)0.30
Safety current (A)0.33
Input power (W)3.6
Rated Current LED (A)-


3-pin to 4-pin 12V-connector-
12V to 7V adapter
12V to 5V adapter
Push pins4
hard plastic washer4
OthersRubber & hard plastic mountings

Safety certification

ApprovalsCE / UL / UKCA / TÜV

Environmental directives



Warranty (Years)5
International hotline / free of charge✓ / DE, FR

Logistics data and RRP

Article numberBL095
EAN code4260052188873
Dimensions, package (L x W x H), (mm)206.5 x 156 x 31
Gross weight, package (kg)0.39
Pieces per packaging unit32
Dimensions, shipping box (L x W x H), (mm)463 x 317 x 388
Gross weight, shipping box (kg)13.81
RRP (€)24.90

SILENT WINGS 4 | 140mm
Article number: BL095