# Optical attenuator CBO SFA21BK8 Singlemode LC Simplex 8 dB

**URL:** https://aio.lv/en/product--blueoptics-sfa21bk8--4467310
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFA21BK8
**EAN:** 4063232044637
**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-sfa21bk8--4467310

## 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

Inline optical attenuator CBO SFA21BK8 for singlemode fiber with LC simplex connector and fixed 8 dB attenuation. Designed to reduce optical signal power to prevent receiver overload or to match link budgets. Suitable for fiber-optic communications, testing and installation in telecom or datacom environments. Compact, plug-and-play form factor for easy insertion in LC ports.

## Long description

Inline optical attenuator BlueOptics SFA21BK8 is a compact, fixed 8 dB attenuation device for singlemode fiber networks with an LC simplex connector. It reduces optical power travelling through the fiber to prevent receiver overload, to balance channel power levels or to meet link budget requirements. The plug-and-play design allows insertion directly into LC ports without additional adapters, making it suitable for use in telecom and datacom installations, field testing and lab environments.
Advantages
The attenuator provides a stable, fixed attenuation value of 8 dB with a small footprint and low insertion loss characteristic besides the specified attenuation. Its LC simplex connector ensures compatibility with standard singlemode patch cords and transceivers. The device is passive, requiring no power, and preserves signal integrity while protecting sensitive receivers from excessive optical power. The compact construction simplifies installation in patch panels, wall outlets or directly on equipment.
Suitable for
 Reducing optical power to prevent receiver overload in singlemode links
 Adjusting link budgets during installation or upgrades
 Field testing and temporary attenuation during commissioning
 Compatibility testing with transceivers and active equipment
Key specifications
 Fiber type: singlemode
 Connector type: LC simplex
 Attenuation: fixed 8 dB
 Form factor: inline plug-and-play
 Operation: passive, no external power required
 Typical use: telecom, datacom, testing and installation
How to use
Insert the LC simplex connector of the attenuator into the LC port of the transmitting or receiving device, or place it inline between two LC patch cords. Ensure connectors and ports are clean before mating to avoid contamination and higher insertion loss. Once connected, the device provides a fixed 8 dB reduction of optical power; no configuration or power is required. When removing or storing the attenuator, protect connector endfaces with dust caps.
Usage recommendations
Verify required attenuation levels and transceiver receiver sensitivity before deployment. Use in-line attenuators with matching fiber type and connector polarity. Clean connectors with an appropriate fiber cleaning tool before insertion and avoid bending the fiber near the connector to maintain optimal performance.

## FAQ

### How much does the Optical attenuator CBO SFA21BK8 Singlemode LC 8 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 — 78 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/4467310/59861814_large.webp