# Attenuator BlueOptics SFA21XK5 LC 5dB Silver

**URL:** https://aio.lv/en/product--blueoptics-sfa21xk5--11186860
**Data updated:** 2026-03-07 18:18 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFA21XK5
**EAN:** 4063232230306
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 53.99 €
**Prices and availability valid until:** 2026-08-02 23:59
**Price without VAT (21%):** 44.62 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-sfa21xk5--11186860

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 31.07.2026 | free |
| Pickup points | 05.08.2026 | 1.89 EUR |
| Courier delivery to door | 05.08.2026 | 4.99 EUR |

## Summary description

The BlueOptics SFA21XK5 attenuator is designed for optimal signal attenuation with a 5 dB rating. It features LC connectors and a sleek silver finish, making it both functional and aesthetically pleasing. Ideal for network applications, this attenuator ensures reliable performance and minimal signal loss, enhancing your network's efficiency.

## Long description

The BlueOptics SFA21XK5 LC 5dB Silver attenuator provides precise optical power reduction for multimode 50/125 µm fiber links operating at 850 nm. Built with an LC/UPC simplex connector and a zirconia ceramic ferrule, this in-line fixed attenuator delivers a stable 5 dB attenuation to prevent receiver saturation on short-distance or high-power installations. The unit is finished in silver and uses low-loss fiber and branded connector components to maintain signal integrity while fitting standard patch panels and fiber assemblies.
Advantages
This attenuator offers a defined 5 dB attenuation with low insertion loss and high return loss, helping to control optical signal levels without introducing significant additional loss. Manufactured using quality fiber and branded connectors, the device is durable and supports a high mating cycle count. The product is factory-tested with interferometry and OTDR measurements; a measurement protocol with input loss and return loss values is included with each unit. The LSZH jacket reduces smoke and halogen emission in case of fire and the component conforms to common industry standards.
Suitable for
Multimode fiber networks (50/125 µm) operating at 850 nm
Short-reach links where transmitter power must be reduced to avoid receiver overload
Patch panels, equipment front-ends and fiber patchcord assemblies with LC connectors
Laboratory setups and field installations requiring fixed 5 dB attenuation
Key specifications
Attenuation: fixed 5 dB
Connector type: LC/UPC simplex
Fiber type support: multimode 50/125 µm
Nominal wavelength: 850 nm
Ferrule material: zirconia ceramic
Jacket: LSZH (low smoke, zero halogen)
Operating temperature range: -40 °C to +75 °C
High return loss and low input loss; factory-tested with interferometer and OTDR
How to use
Insert the LC connector of the attenuator between the transmitter and the receiver or as part of a patchcord assembly to achieve the required 5 dB reduction in optical power. Ensure connectors are clean and free of dust before mating to preserve low insertion loss and prevent damage to the ferrule. Align the polarity and connector orientation with the existing link; the attenuator is passive and requires no power or configuration. After installation, verify optical power levels at the receiver and, if available, compare to the supplied measurement protocol to confirm expected attenuation.
Usage recommendations
For reliable performance, clean connectors with appropriate fiber cleaning tools prior to connection, avoid excessive bending of the fiber near the attenuator, and store unused attenuators in protective caps. Use this 5 dB attenuator when measured receiver levels exceed device specifications or when testing and calibrating multimode systems at 850 nm.

## Specifications

| Feature | Value |
|---|---|
| Connector(s) | LC |
| Product colour | Silver |
| Temperature range (T-T) | -40 - 75 |
| Attenuation | 5 dB |
| Sustainability compliance | Yes |
| Warranty period | 25 year(s) |
| Compliance certificates | RoHS |

## FAQ

### How much does the Attenuator BlueOptics SFA21XK5 cost, and is it available for purchase?

The price is 53.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 27 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 31.07.2026 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/11186860/64084088_large.webp