Attenuator BlueOptics SFA21XK9 LC 9dB Silver

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.