# Optical attenuator CBO SFA24BK25 Singlemode 25 dB

**URL:** https://aio.lv/en/product--blueoptics-sfa24bk25--4467332
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFA24BK25
**EAN:** 4063232045405
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.99 €
**Prices and availability valid until:** 2026-07-25 23:59
**Price without VAT (21%):** 24.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-sfa24bk25--4467332

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

CBO SFA24BK25 is a singlemode optical attenuator with a fixed attenuation of 25 dB. Designed for fiber-optic networks and testing, it reduces signal power to prevent receiver overload or to match link budgets. Compact and easy to install inline, it suits lab measurements, field adjustments, and network maintenance where precise, stable attenuation is required.

## Long description

CBO SFA24BK25 Singlemode 25 dB optical attenuator is a fixed inline device designed to reduce optical signal power by 25 dB in singlemode fiber links. Manufactured by BlueOptics, this compact attenuator is intended for use in fiber-optic networks and test environments where stable, predictable attenuation is required to prevent receiver overload or to balance link budgets. The inline design allows simple insertion between fiber connectors without the need for special tools, making it suitable for laboratory, field, and maintenance applications.
Advantages
The attenuator provides a precise fixed attenuation of 25 dB with stable performance across typical singlemode wavelengths. Its small form factor and standardized connectors enable quick installation and removal, reducing downtime during testing or maintenance. The device is engineered to deliver repeatable attenuation values and low back-reflection, supporting reliable measurements and consistent network behavior. Robust mechanical construction ensures durability during handling and installation in different environments.
Suitable for
 Laboratory optical power measurements and calibration
 Field adjustments to prevent receiver saturation
 Link budget testing and verification in singlemode networks
 Maintenance operations where fixed attenuation is required
Key specifications
 Attenuation: fixed 25 dB
 Fiber type: singlemode
 Form factor: inline attenuator for connector insertion
 Return loss: designed for low back-reflection (typical for singlemode attenuators)
 Operating wavelengths: compatible with standard singlemode telecom wavelengths
 Construction: compact, rugged housing for field and lab use
How to use
Install the attenuator inline by connecting it between two compatible singlemode fiber connectors, ensuring clean and undamaged connector end-faces before mating. Verify connector type compatibility and orient the device so that the light travels through the attenuator in the intended direction if directional marking is present. After installation, confirm system power levels with an optical power meter to ensure the expected 25 dB reduction. When removing or storing the attenuator, protect the connector end-faces with dust caps to maintain performance.
Usage recommendations
Clean connector end-faces before use, avoid excessive bending of the fiber near the attenuator, and store the device in a protective container when not in use. Use this attenuator where fixed, stable attenuation is preferred over variable solutions, and verify system performance after insertion to confirm that receiver input levels are within specified ranges.

## FAQ

### How much does the Optical attenuator CBO SFA24BK25 25 dB cost, and is it available for purchase?

The price is 29.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 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 23.07.2026 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. 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 BlueOptics 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 BlueOptics 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. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/4467332/59858165_large.webp