# CBO optical fiber attenuator SFA23BK3, BlueOptics singlemode, 3 dB attenuation

**URL:** https://aio.lv/en/product--blueoptics-sfa23bk3--4467325
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFA23BK3
**EAN:** 4063232045252
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 24.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-sfa23bk3--4467325

## 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 BlueOptics SFA23BK3 is a fixed singlemode optical fiber attenuator providing 3 dB attenuation. Designed for insertion into singlemode fiber links to reduce optical power levels, it helps prevent receiver saturation and match link budgets. Suitable for testing, maintenance and installation in telecom and datacom networks, it offers stable attenuation for consistent performance.

## Long description

The BlueOptics CBO optical fiber attenuator SFA23BK3 is a fixed singlemode attenuator with 3 dB nominal attenuation, designed for insertion into singlemode fiber links to reduce optical power levels. It provides controlled attenuation to prevent receiver saturation, support link budget adjustments and enable accurate testing and maintenance in telecom and datacom environments. The attenuator uses a standard singlemode connector interface and is intended for stable, repeatable performance in point-to-point links, test setups and installation tasks.
Advantages
This fixed singlemode attenuator delivers a precise 3 dB reduction in optical power with stable performance across typical operating conditions. Its compact, plug-and-play design allows quick insertion into fiber runs without additional tools. The component is compatible with common singlemode connectors and is suitable for both field and laboratory use, offering repeatability and minimal insertion loss variability over time.
Suitable for
 Preventing optical receiver saturation in singlemode transmission links
 Adjusting link budget during installation or maintenance
 Laboratory and field testing of singlemode fiber equipment
 Temporary attenuation during diagnostic procedures or equipment commissioning
Key specifications
 Attenuation: 3 dB nominal
 Fiber type: singlemode
 Connector interface: standard singlemode connector compatible
 Form factor: fixed inline attenuator for easy insertion
 Typical application: telecom and datacom singlemode links, testing and maintenance
How to use
Install the attenuator by inserting it into the optical path between the transmitter and receiver or between a test instrument and the device under test. Ensure connectors are clean before mating to avoid contamination and excess loss. For temporary testing, insert the attenuator into patch cords or between adaptors as required. Verify link performance after installation and remove or replace the attenuator when changes to the link budget are complete.
Usage recommendations
Use a fiber inspection tool and cleaning procedure before connecting to preserve signal quality. Keep the attenuator capped when not in use and avoid exposing it to mechanical stress or contamination. For precise measurement tasks, confirm the effective attenuation with a calibrated optical power meter and, if necessary, account for connector losses in the overall link budget.

## FAQ

### How much does the CBO BlueOptics SFA23BK3 singlemode attenuator 3 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 — 14 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/4467325/59856750_large.webp