# Attenuator BlueOptics SFA21XK9 LC 9dB Silver

**URL:** https://aio.lv/en/product--blueoptics-sfa21xk9--11262553
**Data updated:** 2026-03-07 19:55 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFA21XK9
**EAN:** 4063232230344
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 53.99 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 44.62 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-sfa21xk9--11262553

## 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 SFA21XK9 attenuator features a 9 dB attenuation level, ensuring optimal signal quality in your network. With an LC connector and a sleek silver design, it is perfect for various applications. This attenuator helps to reduce signal strength, preventing overload and maintaining system integrity. Ideal for use in data centers and telecommunications, it offers reliability and performance you can trust.

## Long description

The BlueOptics SFA21XK9 LC 9dB Silver attenuator is designed for multimode (50/125 µm) fiber links operating at 850 nm and provides a controlled 9 dB reduction of optical power. Featuring an LC/UPC simplex connector with a zirconia ceramic ferrule, this inline attenuator lowers signal level to prevent receiver overload on short links and maintain signal integrity in data centers and telecommunications environments. The unit is finished in a silver housing and is built to industry standards with a low insertion loss and high return loss.
Advantages
This attenuator delivers a precise 9 dB attenuation to control optical power without introducing significant additional loss. It uses high-quality branded fiber and reputable connector components for durable, repeatable connections and up to 1500 mating cycles. Production testing with interferometer and OTDR ensures measured input loss and return loss values are documented and supplied with each unit. The device is suitable for operation across an extended temperature range and is housed in a flame-retardant LSZH jacket that minimizes smoke and avoids halogen emissions.
Suitable for
 Multimode fiber links (50/125 µm) at 850 nm
 Short-distance connections where transmitter power must be reduced
 Data center patch panels and equipment racks
 Telecommunications and enterprise network equipment
 Laboratory setups and test measurements requiring defined attenuation
Key specifications
 Attenuation: 9 dB nominal
 Connector type: LC/UPC simplex
 Fiber type: Multimode 50/125 µm
 Operating wavelength: 850 nm
 Ferrule material: Zirconia ceramic
 Return loss: high (factory-tested for low reflections)
 Insertion loss: low (factory-measured and reported)
 Temperature range: designed for operation from −40°C to +75°C
 Jacket material: LSZH (low smoke, zero halogen)
 Durability: up to approximately 1500 mating cycles for connectors
How to use
Install the BlueOptics SFA21XK9 inline by connecting the LC/UPC simplex connector to the transmitter or patch panel port and the other end to the receiving port or patch lead. Ensure connectors are clean and free of dust before mating to avoid increased loss or damage to the ferrule. Verify signal levels before and after insertion of the attenuator and confirm that the 9 dB reduction places the receiver within its specified input power range. Handle the unit by the housing and avoid bending the attached fiber beyond recommended bend radii.
Usage recommendations
Use the attenuator primarily on multimode 50/125 µm links at 850 nm and select 9 dB attenuation when measured transmitter power exceeds receiver tolerance. Clean connector end-faces with appropriate tools, store the unit with dust caps when not in use, and refer to provided measurement protocol for input and return loss values when documenting link performance.

## Specifications

| Feature | Value |
|---|---|
| Connector(s) | LC |
| Product colour | Silver |
| Temperature range (T-T) | -40 - 75 |
| Attenuation | 9 dB |
| Sustainability compliance | Yes |
| Warranty period | 25 year(s) |
| Compliance certificates | RoHS |

## FAQ

### How much does the Attenuator BlueOptics SFA21XK9 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 — 50 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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