# Attenuator BlueOptics SFA21XK7 LC 7dB Silver

**URL:** https://aio.lv/en/product--blueoptics-sfa21xk7--11262555
**Data updated:** 2026-03-07 19:55 (EET)
**Category:** Network Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFA21XK7
**EAN:** 4063232230320
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 53.99 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 44.62 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-sfa21xk7--11262555

## 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

The BlueOptics SFA21XK7 attenuator provides a reliable 7 dB attenuation for LC connections. Its silver color and compact design make it suitable for various networking applications. Ideal for reducing signal strength in fiber optic networks, ensuring optimal performance and preventing signal overload. Perfect for both professional and personal use.

## Long description

The BlueOptics SFA21XK7 LC 7dB Silver attenuator provides controlled optical attenuation for multimode fiber links, reducing signal strength by 7 dB on LC/UPC simplex connections. Designed for 50/125 µm multimode fibers at 850 nm, this compact silver attenuator uses a ceramic ferrule and industry-grade components to deliver stable loss characteristics and reliable mating performance. It is intended to prevent receiver overload on short-distance links or high-power transmitters, and is compatible with standard LC ports in networking equipment.
Advantages
The attenuator offers a precise 7 dB attenuation with low input loss and high return loss, supporting predictable signal reduction without introducing significant additional reflection. Built with high-quality fiber and branded connector components, it features a zirconia ceramic ferrule for durable mating cycles and consistent optical performance. The LSZH jacket and compliance with common industrial standards ensure safer installations in indoor and professional environments.
Suitable for
 Multimode fiber networks (50/125 µm) operating at 850 nm
 LC/UPC simplex ports on transceivers, switches and patch panels
 Short-distance links where transmitter power must be reduced to avoid receiver saturation
 Data centers, server rooms, telecom closets and laboratory test setups
Key specifications
 Attenuation: 7 dB
 Connector type: LC/UPC simplex
 Fiber type compatibility: Multimode 50/125 µm
 Operating wavelength: 850 nm
 Ferrule material: Zirconia ceramic
 Jacket: LSZH (low smoke zero halogen)
 Operating temperature range: -40 °C to +75 °C
 Durability: up to 1500 mating cycles (typical for installed connectors)
How to use
Insert the LC/UPC simplex connector of the attenuator into the device or transceiver receive port until it clicks securely, then connect the other end of the fiber link as required. Ensure connectors and ports are clean and free of dust before mating to avoid contamination-related losses. The attenuator is passive and requires no power or configuration; once installed it will reduce the optical power by approximately 7 dB at the specified wavelength.
Usage recommendations
Verify the required attenuation for your link using power meters or diagnostic tools before installation. Use the attenuator in combination with clean connectors and appropriate patch cords; avoid excessive bending near the connector and respect manufacturer temperature limits. For systems sensitive to return loss, choose the polish type and connector combination that matches your equipment requirements.

## Specifications

| Feature | Value |
|---|---|
| Temperature range (T-T) | -40 - 75 |
| Attenuation | 7 dB |

### Features

| Feature | Value |
|---|---|
| Product colour | Silver |

### Other features

| Feature | Value |
|---|---|
| Connector(s) | LC |

### Technical details

| Feature | Value |
|---|---|
| Sustainability compliance | Yes |

### Logistics data

| Feature | Value |
|---|---|
| Warranty period | 25 year(s) |

### Certificates

| Feature | Value |
|---|---|
| Compliance certificates | RoHS |

## FAQ

### How much does the Attenuator BlueOptics SFA21XK7 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 — 46 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/11262555/64084140_large.webp