Fan be quiet! SILENT WINGS PRO 4 140mm PWM

Name: Fan be quiet! SILENT WINGS BL099
Brand: bequiet!
SKU: 4817940
Price: 37.49 EUR
Availability: InStock

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Short description

The be quiet! SILENT WINGS PRO 4 is a 140mm PWM fan designed for optimal cooling performance. With a maximum rotational speed of 2400 RPM, it delivers an impressive airflow of 165.5 m³/h and a maximum air pressure of 3.64 mmH2O. The fan features a Fluid Dynamic Bearing for quiet operation and longevity. Operating voltage ranges from 7 to 13.2 V, making it versatile for various setups. Its sleek black design fits seamlessly into any build.

Available at price 37.49 €: 1 pcs.

Total available for order: 241 pcs.

Warranty: 2 Years

SKU: 4817940

Manufacturer: bequiet!

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Deliver the order:

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to the Customer Service Center at Kengaraga 2b, Riga

29.06.2026 {{selectedOffer.officeDeliveryString}}

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Customer service center

2b. Kengaraga str., Riga, Latvia, LV-1063

29.06.2026 {{selectedOffer.officeDeliveryString}}

free

Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!

02.07.2026 {{selectedOffer.courierDeliveryString}}

From 4.99 € (Weight: 0.46 kg)

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From 1.99 €

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Payment Methods:

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Product information

Description

The be quiet! SILENT WINGS PRO 4 140mm PWM is a high-performance 140 mm computer cooling fan offering a balance of strong airflow and low noise. It uses optimized fan blades, a design that fits radiator corners, and a selectable three-speed switch to adapt cooling to different needs. The fan is built with a Fluid Dynamic Bearing for quiet operation and long service life, and its black finish suits most PC builds.

Advantages

The fan delivers up to 2400 RPM for high cooling capacity while maintaining reduced vibration and acoustic output thanks to its optimized blades and refined bearing. It provides a maximum airflow of 165.5 m³/h and a maximum static pressure of 3.64 mmH2O, making it suitable for use on radiators and heat sinks. The three-speed switch and PWM control allow precise speed adjustment across a wide operating voltage range (7–13.2 V).

Suitable for

Case cooling in gaming and workstation PCs
Radiator and liquid cooling loop fans
CPU and GPU heatsink ventilation
Builds requiring a balance of airflow and low noise

Key specifications

Model: be quiet! SILENT WINGS PRO 4 140mm PWM (MPN BL099, EAN 4260052188910)
Fan diameter: 140 mm
Maximum speed: 2400 RPM
Maximum airflow: 165.5 m³/h
Maximum static pressure: 3.64 mmH2O
Bearing type: Fluid Dynamic Bearing
Operating voltage: 7–13.2 V (PWM control)
Colour: Black
Weight: 0.258 kg

How to use

Install the fan in the desired position following your case or radiator manufacturer’s instructions, orienting airflow according to cooling requirements. Connect the PWM cable to a compatible motherboard header or fan controller and select the required speed using the integrated three-speed switch or via motherboard PWM control. Ensure secure mounting to minimize vibration and check clearances around heatsinks and radiators.

Usage recommendations

For radiator installations and tightly packed heatsinks, use higher fan speeds (or full PWM range) to maintain optimal temperatures. For quiet operation in less demanding setups, select a lower speed setting. Regularly clean the fan and surrounding filters to preserve airflow and extend lifespan.

Specifications

Type:: Fan
Fan diameter:: 140 mm
Weight:: 0.258 kg
Product colour:: Black

All features

Performance

Type:: Fan
Fan diameter:: 140 mm
Noise level (high speed):: 36.8 dB
Rotational speed (max):: 2400 RPM
Maximum airflow:: 97.41 cfm
Mean time between failures (MTBF):: 300000 h
Airflow:: 165.5 m³/h
Maximum air pressure:: 3.64 mmH2O
Bearing type:: Fluid Dynamic Bearing (FDB)
Pulse-width modulation (PWM) support:: Yes
Suitable location:: Computer case
Quantity per pack:: 1 pc(s)

Design

Product colour:: Black
Certification:: CE / ROHS / RU / UKCA / TÜV / WEEE
Fan connector:: 4-pin

Weight & dimensions

Cable length:: 0.5 m
Weight:: 0.258 kg
Package weight:: 448 g
Height:: 25 mm
Width:: 140 mm
Depth:: 140 mm
Package depth:: 206.5 mm
Package height:: 31 mm
Package width:: 156 mm
Fan dimensions (W x D x H):: 140 x 140 x 25

Power

Power consumption (typical): Power consumption in switched-on state expressed in W.: 6 W
Rated current:: 0.5 A
Maximum current:: 0.5 A
Voltage:: 7 - 13.2
Rated voltage:: 12 V

Packaging content

Number of screws:: 4
Screws included:: Yes
Number of clips:: 4

Other features

Country of origin:: Germany

Logistics data

Shipping (inner) case width:: 317 mm
Shipping (inner) case length:: 463 mm
Shipping (inner) case height:: 388 mm
Shipping (inner) case gross weight:: 15540 g
Products per shipping (inner) case:: 32 pc(s)
Harmonized System (HS) code:: 84733080

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Instructions

mmo_100726719_1657033069_5043_19184.pdf

bequiet-BL099-4817940.pdf

bequiet-BL099-4817940(1).pdf

Description

Instructions

mmo_100726719_1657033069_5043_19184.pdf

bequiet-BL099-4817940.pdf

bequiet-BL099-4817940(1).pdf

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Warehouse	Stock	Delivery to the store	Store Price
WH113	1	29.06.2026	37.49 €
EU2	1	Tuesday	38.49 €
EU1	16	22.06.2026	38.49 €
BT19	30	Friday Best delivery	38.99 €
WH334	10	29.06.2026	39.49 €
EU3	46	29.06.2026	39.49 €
EU16	8	29.06.2026	40.99 €
WH356	17	30.06.2026	41.49 €
WH94	46	29.06.2026	42.99 €

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Available only for legal entities
Warehouse	Stock	Delivery to the store	Store Price
WH345	20	29.06.2026	38.49 €
WH109	46	13.07.2026	47.49 €

37.49 €

Stock: 1

Delivery Date: 29.06.2026

Warehouse: WH113

38.49 €

Stock: 1

Delivery Date: Tuesday

Warehouse: EU2

38.49 €

Stock: 16

Delivery Date: 22.06.2026

Warehouse: EU1

38.99 €

Stock: 30

Delivery Date: Friday Best delivery

Warehouse: BT19

39.49 €

Stock: 10

Delivery Date: 29.06.2026

Warehouse: WH334

39.49 €

Stock: 46

Delivery Date: 29.06.2026

Warehouse: EU3

40.99 €

Stock: 8

Delivery Date: 29.06.2026

Warehouse: EU16

41.49 €

Stock: 17

Delivery Date: 30.06.2026

Warehouse: WH356

42.99 €

Stock: 46

Delivery Date: 29.06.2026

Warehouse: WH94

Available only for legal entities

38.49 €

Stock: 20

Delivery Date: 29.06.2026

Warehouse: WH345

47.49 €

Stock: 46

Delivery Date: 13.07.2026

Warehouse: WH109

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Customer questions

FAQ

How much does the Fan be quiet! SILENT WINGS PRO 4 140mm PWM cost, and is it available for purchase?

The price is 37.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 241 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 29.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All bequiet! products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized bequiet! service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: type, fan diameter, weight, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

Where can I download the instructions for Fan be quiet! SILENT WINGS PRO 4 140mm PWM?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

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