# Optical Fiber Inline Attenuator CBO SFA21BK15 Singlemode 15 dB

**URL:** https://aio.lv/en/product--blueoptics-sfa21bk15--4467301
**Data updated:** 2026-02-24 11:00 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFA21BK15
**EAN:** 4063232044538
**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-sfa21bk15--4467301

## 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 fiber attenuator CBO SFA21BK15 provides fixed 15 dB attenuation for singlemode fiber links. Designed for insertion into patchcords or fiber lines, it helps manage signal levels, prevent receiver overload and optimise link performance. Compact, passive device suitable for testing, telecom, datacenter and fibre-optic network maintenance.

## Long description

The BlueOptics Optical Fiber Inline Attenuator SFA21BK15 is a compact passive device that provides a fixed 15 dB attenuation for singlemode fiber links. Intended for insertion into patchcords or fiber lines, this inline attenuator reduces optical power to prevent receiver overload and to balance link budgets in telecommunications, data center and test environments. Its simple, connectorized form factor makes it suitable for use where a reliable, maintenance-free attenuation is required without additional equipment.
Advantages
This inline attenuator offers a precise fixed attenuation of 15 dB, enabling predictable reduction of optical signal strength. Its singlemode compatibility ensures stable performance on standard ITU-T singlemode wavelengths. The passive design requires no power and introduces minimal mechanical complexity, while the compact connectorized housing supports easy insertion and removal in existing fiber runs. The device is designed to maintain signal integrity and to minimize back reflections when used according to fiber type and connector specifications.
Suitable for
Balancing optical power between transmitter and receiver in singlemode links
Preventing receiver saturation in telecom and datacentre equipment
Temporary or permanent insertion in patchcords during testing and commissioning
Maintenance tasks and troubleshooting of fibre-optic networks
Key specifications
Attenuation: fixed 15 dB
Fiber type: singlemode
Connectorized inline design for easy insertion into fiber lines
Passive device — no external power required
Compact form factor suitable for patch panels and field use
How to use
Insert the inline attenuator into the fiber link by disconnecting the patchcord or fiber connector at the desired point and coupling the attenuator between the two connectors. Ensure that connector types and polish styles are compatible and that connectors are clean before mating to avoid additional loss or contamination. After insertion, verify signal levels and link performance to confirm the 15 dB reduction and proper operation of connected equipment.
Usage recommendations
Use the attenuator with singlemode transceivers and patchcords matched to the same connector and fiber specifications. Clean connectors before use and avoid repeated mating cycles beyond manufacturer guidelines. For precise link budgeting, measure optical power before and after insertion to confirm actual attenuation under system conditions.

## FAQ

### How much does the Optical Attenuator CBO SFA21BK15 15 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 — 86 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/4467301/59855563_large.webp