be quiet! Silent Wings Pro 4 140mm PWM - High-Performance Cooling Fan

The Silent Wings Pro 4 140mm PWM represents be quiet!'s most advanced fan technology, combining exceptional cooling performance with near-silent operation. Engineered with redesigned fan blades from the ground up, this 140mm fan delivers unmatched performance across all applications - whether mounted in cases, on radiators, or heat sinks.

Performance Specifications

Operating at up to 2400 RPM, the Silent Wings Pro 4 achieves 97.41 CFM airflow with 3.64 mm H2O air pressure while maintaining just 36.8 dB(A) noise levels at maximum speed. The 6-pole fan motor with fluid-dynamic bearing (FDB) ensures virtually inaudible operation at medium speeds, making it ideal for both silent builds and high-performance systems.

Three-Speed Switch System

The integrated speed switch provides three distinct operating modes: medium-speed for standard cooling, high-speed for enhanced performance, and ultra-high-speed (2400 RPM) for demanding hardware configurations. This flexibility allows users to balance cooling requirements with acoustic preferences without software adjustments.

Optimized Airflow Design

Minimized tip clearance between blades and frame creates extraordinarily high static pressure, essential for restrictive applications like dense radiators and finned heat sinks. The funnel-shaped air outlet further enhances pressure characteristics, ensuring efficient heat dissipation even through resistance.

Three Mounting Options Included

Pre-installed radiator corners maximize performance on liquid cooling radiators. Anti-vibration mounts reduce operational vibrations for chassis installation. Standard plastic mountings provide universal compatibility. All mounting hardware and four screws included.

Premium Build Quality

The fluid-dynamic bearing technology enables an exceptional 300,000-hour operational lifespan. The 6-pole motor design reduces power consumption to 6.0W while minimizing vibration. A sleeved 500mm PWM cable with easy-connect 4-pin connector completes the professional appearance.

Technical Specifications

• Dimensions: 140 x 140 x 25mm
• Speed Range: Up to 2400 RPM (PWM controlled)
• Airflow: 97.41 CFM / 165.5 m³/h
• Static Pressure: 3.64 mm H2O
• Noise Level: 36.8 dB(A) at maximum speed
• Bearing: Fluid-Dynamic Bearing (FDB)
• Connector: 4-pin PWM
• Voltage: 12V DC (7-13.2V operating range)
• Lifespan: 300,000 hours at 25°C
• Warranty: 5 years manufacturer warranty

Package Contents

Silent Wings Pro 4 140mm PWM fan with pre-installed radiator corners, anti-vibration mounts, plastic mounting hardware, 4 screws, and 4 push pins.

General Data
Model: Silent Wings Pro 4 140mm PWM
Dimensions (mm): 140
Color option: Black
Lighting: -
Fan speed @ 100% PWM / 12V (rpm): 2400
Noise level @ 100% PWM / 12V (dB(A)): 36.8
Air Flow @ 100% PWM / 12V (CFM / m3/h): 97.41 / 165.5
Air Pressure @ 100% PWM / 12V (mm H2O): 3.64

Mechanical Specifications
Dimensions (L x W x H), (mm): 140 x 140 x 25
Weight incl. fixed cables (g): 258
Bearing technology: FDB
Motor technology: 6-pole fan motor
Push pin fixing: Yes
Screw fixing: Yes

Cables / Connectors
Daisy chain for lighting signal: -
Lighting connector: -
Connector: 4-pin PWM
Cable length (mm): 500
Cable sleeve: Yes

Performance / Noise
Air Flow @ 100% PWM / 12V (CFM / m3/h): 97.41 / 165.5
Air Pressure @ 100% PWM / 12V (mm H2O): 3.64
Noise level @ 100% PWM / 12V (dB(A)): 36.8
Lifespan (h / 25°C): 300,000

Electrical Specifications
Rated Voltage DC (V): 12
Operating Voltage DC (V): 7 - 13.2
Current consumption (A): 0.50
Safety current (A): 0.50
Input power (W): 6.0
Rated Current LED (A): -

Accessories
3-pin to 4-pin 12V-connector: -
12V to 7V adapter: -
12V to 5V adapter: -
Screws: 4
Push pins: 4
hard plastic washer: -
Others: -

Safety Certification
Approvals: CE / RoHs / RU / UKCA / TUV / WEEE

Environmental Directives
RoHs: -
Triman: -

Logistics Data
Article number: BL099
Dimensions, package (L x W x H), (mm): 206.5 x 156 x 31
Gross weight, package (kg): 0.448

• Product Type: Case Fan
• Fan Size: 140mm
• Max Fan Speed: 2400RPM
• Fan Shroud Colour: Black
• LED Colour: None
• Connections: 4-Pin Fan