# Optical attenuator CBO SFA21BK12 singlemode, fixed 12 dB attenuation, inline fiber adapter

**URL:** https://aio.lv/en/product--blueoptics-sfa21bk12--4467298
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFA21BK12
**EAN:** 4063232044507
**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-sfa21bk12--4467298

## 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 SFA21BK12 is a singlemode optical attenuator with fixed 12 dB attenuation. Designed for inline installation in fiber-optic links, it reduces signal power to protect receivers and balance channel levels. Suitable for testing, system commissioning and power management in telecom, datacom and lab environments. Compact design ensures simple insertion without signal distortion.

## Long description

The BlueOptics Optical attenuator CBO SFA21BK12 is a singlemode fixed inline attenuator with 12 dB attenuation, designed to reduce optical power levels in fiber-optic links. Its compact, inline form factor enables simple insertion into patchcords or permanent links to protect sensitive receivers, prevent saturation and help equalize channel power. The device maintains signal integrity while providing a stable attenuation value suitable for testing, commissioning and routine power management in telecom, datacom and laboratory environments.
Advantages
This fixed 12 dB attenuator delivers predictable and stable attenuation with minimal insertion loss beyond the specified value and low return loss for singlemode systems. The inline adapter format allows quick deployment without reconfiguring existing connectors. The compact design is robust for lab use and field installations, and the device is compatible with standard singlemode connectors, ensuring straightforward integration into patch panels and fiber links.
Suitable for
Reducing optical power to protect receivers in telecom and datacom networks
Balancing channel power in wavelength-division multiplexing (WDM) systems
System commissioning and routine maintenance/testing in labs and field environments
Temporary inline attenuation during equipment upgrades or troubleshooting
Key specifications
Mode: singlemode
Attenuation: fixed 12 dB
Form factor: inline fiber adapter
Application: inline insertion for attenuation, testing and power management
Compatibility: standard singlemode connector systems
How to use
Insert the attenuator inline between two singlemode fiber connectors by connecting it directly to the existing patchcord or adapter. Ensure connectors are clean before installation to avoid contamination-related loss. Verify the fiber alignment and secure the connection; no additional configuration is required. After insertion, confirm the received optical power at the downstream device to ensure the desired attenuation effect and system safety.
Usage recommendations
Use the attenuator in environments where fixed attenuation is required for receiver protection, channel balancing or testing. Avoid exposing connectors to dust and moisture, and keep connectors covered when not in use. For precise power adjustments during commissioning, combine fixed attenuators with calibrated test equipment and follow standard fiber handling procedures.

## FAQ

### How much does the CBO SFA21BK12 optical attenuator 12 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 — 88 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/4467298/59853285_large.webp