# Optical attenuator CBO SFA21BK10 Singlemode LC Simplex 10 dB

**URL:** https://aio.lv/en/product--blueoptics-sfa21bk10--4467296
**Data updated:** 2026-02-24 11:00 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFA21BK10
**EAN:** 4063232044484
**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-sfa21bk10--4467296

## 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 SFA21BK10 is a fixed optical attenuator for singlemode fiber with an LC simplex connector and 10 dB attenuation. Designed to reduce optical power levels in fiber-optic links, it helps prevent receiver saturation and match signal levels in testing or permanent installations. Compact LC simplex form factor simplifies inline insertion in patch panels and equipment.

## Long description

CBO SFA21BK10 Singlemode LC Simplex 10 dB is a fixed inline optical attenuator designed for singlemode fiber networks. It features an LC simplex connector and provides 10 dB of attenuation to reduce optical power levels between transmitting and receiving equipment. The compact LC simplex form factor allows straightforward insertion into patch cords, patch panels or equipment ports without significant space requirements.
Advantages
The attenuator offers a consistent, factory-calibrated 10 dB loss that helps prevent receiver saturation and enables proper power balancing in fiber links. Its singlemode design and LC simplex interface ensure compatibility with standard singlemode patch cords and transceivers. The compact construction minimizes insertion footprint and preserves fiber alignment for stable optical performance over time.
Suitable for
Reducing optical power to prevent receiver overload in singlemode links
Matching signal levels during laboratory testing or field measurement
Inline use in patch panels, distribution frames or directly at equipment ports
Permanent installations where fixed attenuation is required
Key specifications
Attenuation: 10 dB (fixed)
Fiber type: singlemode
Connector: LC simplex
Insertion format: inline/adapter-style
Typical use: optical power reduction and level matching
How to use
Insert the LC simplex attenuator inline between the transmitter and receiver or into a patch cord connection where power reduction is needed. Ensure connectors are clean and undamaged before mating to maintain low return loss and avoid signal degradation. The attenuator does not require configuration; it provides the specified fixed loss once properly connected. For temporary testing, insert the attenuator into a test jumper; for permanent use, install it at the intended port in the patch panel or equipment.
Usage recommendations
Use a visual inspection tool or fiber inspection microscope to verify connector endface cleanliness prior to connection. Avoid excessive bending or mechanical stress on the attenuator and connected fiber; follow standard singlemode fiber handling practices. Store the attenuator in a dry, dust-free environment when not in use.

## FAQ

### How much does the CBO SFA21BK10 optical attenuator 10 dB LC Simplex 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 — 47 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

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