# Attenuator BlueOptics SFA23BK7 7 dB Red ST Connector

**URL:** https://aio.lv/en/product--blueoptics-sfa23bk7--4467327
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFA23BK7
**EAN:** 4063232045290
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.99 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 24.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-sfa23bk7--4467327

## 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 SFA23BK7 is a 7 dB attenuator designed for optimal signal reduction. It features a red color and ST connectors, making it suitable for various optical applications. This product ensures reliable performance in reducing signal strength while maintaining quality.

## Long description

The BlueOptics SFA23BK7 7 dB Red ST Connector fiber optic attenuator reduces optical signal power by 7 dB for single-mode (9/125 µm) links. Designed for use with G.652.D fibers across the 1270–1610 nm wavelength range, this ST/PC simplex attenuator uses a zirconia ceramic ferrule and a flame-retardant LSZH jacket. It is intended to lower signal level where transmit power is too high for the receiver or where precise link power balancing is required on short optical runs.
Advantages
This attenuator provides a defined 7 dB insertion loss with low input loss and high return loss, minimizing reflections and preserving signal integrity. Manufactured with branded single-mode fiber and industry-standard ST/PC connectors, it offers reliable mechanical endurance and compatibility with common network equipment. The LSZH jacket reduces smoke and prevents halogen emissions in case of fire, and each unit is factory-tested with interferometer and OTDR measurements and supplied with a measurement protocol.
Suitable for
Attenuating excess optical power in single-mode fiber links
Balancing transmit power between active units and receivers
Short-distance fiber runs where transmitter output is high
Laboratory testing and field maintenance where a fixed 7 dB attenuation is required
Installations requiring ST/PC simplex connectors
Key specifications
Attenuation: 7 dB (fixed)
Fiber type: single-mode 9/125 µm (G.652.D)
Wavelength range: 1270–1610 nm
Connector type: ST/PC simplex
Ferrule material: zirconia ceramic
Operating temperature: -40 °C to +75 °C
Jacket: low-smoke zero-halogen (LSZH)
Return loss: high (factory optimized, polish dependent)
Durability: up to ~1500 mating cycles (connector dependent)
How to use
Install the BlueOptics SFA23BK7 by inserting the ST connector into the equipment or patch panel receptacle until it latches. Connect the other end of the link to the transmitter or receiver as required; the attenuator is simplex and provides a fixed 7 dB reduction in forward signal power. Ensure cleanliness of connector endfaces before mating to avoid increased insertion loss or back reflections. Use the included measurement protocol to verify insertion and return loss after installation.
Usage recommendations
For reliable performance, clean connector endfaces with appropriate fiber cleaning tools before each use and avoid excessive bending of the fiber near the attenuator. Select fixed attenuators of the required attenuation value to match receiver sensitivity and system power budget. Verify link power with an optical power meter and, if needed, confirm reflectance and trace with OTDR measurements.

## Specifications

| Feature | Value |
|---|---|
| Connector(s) | ST |
| Product colour | Red |
| Temperature range (T-T) | -40 - 75 |
| Attenuation | 7 dB |

## FAQ

### How much does the Attenuator BlueOptics SFA23BK7 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 — 16 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

### Where can I download the instructions for Attenuator BlueOptics SFA23BK7?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/4467327/64294746_large.webp