Attenuator BlueOptics SFA21XK6 LC 6dB Black

The BlueOptics SFA21XK6 LC 6dB Black attenuator is a fixed optical attenuator designed for multimode 50/125 µm fiber links operating at 850 nm. Fitted with an LC/UPC simplex connector and a zirconia ceramic ferrule, it provides a controlled 6 dB reduction of optical power to prevent receiver overload on short links or high-power transmitters. The compact black housing and LSZH outer jacket are intended for professional networking environments and help minimise smoke and toxic gas emission in the event of a fire.

Advantages

This attenuator delivers a stable, low insertion loss and high return loss performance specific to a 6 dB attenuation level, with components sourced from established manufacturers. The LC/UPC connector and ceramic ferrule ensure consistent mating reliability and long life, supporting many mating cycles. Devices are factory-tested with interferometer and OTDR measurements and supplied with a measurement protocol for input and return loss.

Suitable for

• Multimode 50/125 µm fiber links at 850 nm
• Short-distance links where transmitter power must be reduced to match receiver sensitivity
• Data center patch panels and network equipment with LC/UPC ports
• Industrial or commercial installations requiring LSZH cabling materials

Key specifications

• Attenuation: 6 dB fixed
• Connector type: LC/UPC simplex
• Fiber type compatibility: multimode 50/125 µm (850 nm)
• Ferrule material: zirconia ceramic
• Operating temperature range: -40 °C to +75 °C
• Outer jacket: LSZH (low smoke, zero halogen)
• Tested by: interferometer and OTDR; measurement protocol included

How to use

Insert the LC/UPC connector of the attenuator into the LC port of the transmitting or receiving device, ensuring correct alignment and secure mating. The attenuator is simplex – it must be placed in the optical path on the appropriate fiber strand. Clean both connector end faces before installation to avoid increased insertion loss. After installation, verify link performance using appropriate optical power meters or test equipment to confirm the 6 dB reduction and acceptable return loss.

Usage recommendations

Maintain clean connector end faces and avoid excessive bending of the fiber near the attenuator. Store and handle the attenuator in a dry, dust-free environment. For repeated mating cycles, inspect connectors periodically and replace if the ferrule or housing shows wear that could affect performance.