# Fiber Optic Attenuator CBO SFA23BK20 Singlemode 20 dB

**URL:** https://aio.lv/en/product--blueoptics-sfa23bk20--4467323
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFA23BK20
**EAN:** 4063232045221
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 24.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-sfa23bk20--4467323

## 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 SFA23BK20 is a singlemode fiber optic attenuator with a fixed attenuation of 20 dB. Designed for insertion into singlemode fiber links to reduce optical power levels, it helps prevent receiver saturation and ensures optimal signal levels for testing, maintenance, or permanent installations. Compact and simple to install for telecom and data center use.

## Long description

The BlueOptics Fiber Optic Attenuator CBO SFA23BK20 Singlemode 20 dB is a fixed singlemode inline attenuator that reduces optical power by 20 dB. It is intended for use in singlemode fiber links to lower signal strength to safe and optimal levels for receivers, preventing saturation and allowing accurate measurements during testing or stable operation in permanent installations. The compact design and standard connector interfaces make it suitable for telecom racks, network cabinets and data centre patch panels.
Advantages
This fixed attenuator provides a precise 20 dB reduction in optical power with minimal back reflection, supporting stable singlemode transmission. Its compact footprint and robust ferrule construction enable easy insertion into existing fiber runs without special tools. The device is compatible with common singlemode connectors and designed for reliable long-term use in professional network environments.
Suitable for
Preventing receiver saturation in singlemode optical links
Adjusting optical power levels during commissioning and testing
Permanent attenuation in telecom and data centre installations
Laboratory and field testing where controlled power reduction is required
Key specifications
Attenuation: fixed 20 dB
Transmission window: singlemode operation (OS1/OS2 wavelength range compatibility)
Connector type: compatible with standard singlemode connectors
Return loss: low back reflection suitable for singlemode systems
Operating temperature range: suitable for indoor telecom and data centre environments
Form factor: compact inline attenuator for rack and panel mounting
How to use
Insert the attenuator inline between two mating singlemode connectors, ensuring proper alignment of connector end faces before coupling. For testing, place the attenuator at the output of the transmitter or at an intermediate point to achieve the required 20 dB reduction and then verify power levels with an optical power meter. For permanent installations, secure connections in the patch panel or adapter and avoid sharp bends or mechanical stress on the fiber around the attenuator.
Usage recommendations
Handle the attenuator using clean hands or gloves and always inspect and clean connector end faces before insertion. Store the device with protective caps when not in use and avoid exposure to excessive dust, moisture or mechanical impact to maintain stable attenuation and low insertion loss.

## FAQ

### How much does the Fiber Optic Attenuator CBO SFA23BK20 20 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/4467323/59859870_large.webp