Attenuator BlueOptics SFA21XK2 LC 2dB Silver

The BlueOptics SFA21XK2 LC 2dB Silver attenuator is a compact inline device designed to reduce optical signal power by 2 dB in multimode (50/125 µm) fiber links at 850 nm. Fitted with an LC/UPC simplex connector and a zirconia ceramic ferrule, the attenuator supports reliable mating cycles and low insertion loss while maintaining high return loss. Its silver housing and LSZH jacket make it suitable for installations where space, signal integrity and safety standards are important. Each unit is factory-tested with interferometry and OTDR and is supplied with measured insertion loss and return loss values.

Advantages

This attenuator provides precise 2 dB attenuation to prevent receiver saturation on short or high-power multimode links. Use of high-quality branded fiber and manufacturer-grade connectors ensures stable performance, low insertion loss and extended mechanical life up to the rated mating cycles. The LSZH jacket and compliance with common industry standards reduce smoke and halogen emissions in case of fire while meeting relevant safety norms. Factory testing and a supplied measurement report provide traceability and predictable optical behaviour.

Suitable for

• Multimode fiber links (50/125 µm) operating at 850 nm
• Short-distance installations where transmitter power is high relative to receiver sensitivity
• Patch panels, fiber patch cords and rack-mounted network equipment using LC/UPC connectors
• Environments requiring low-smoke, zero-halogen (LSZH) cabling

Key specifications

• Nominal attenuation: 2 dB
• Connector type: LC/UPC simplex
• Fiber type: Multimode 50/125 µm
• Operating wavelength: 850 nm
• Ferrule material: Zirconia ceramic
• Temperature range: -40 °C to +75 °C
• Jacket: LSZH (low smoke, zero halogen)
• Tested with interferometer and OTDR; measurement report included

How to use

Install the attenuator by inserting the LC simplex connector into the LC receptacle of the transmitter or receiver patchcord as required to achieve the desired power reduction. Ensure connectors are clean and free of dust before mating; use appropriate fiber cleaning tools to avoid contaminating ferrules. After connection, verify link performance and confirm the reduced optical power at the receiver with test equipment if available. Handle the attenuator by the connector body and avoid excessive bending of the fiber or tensile stress on the joint.

Usage recommendations

For consistent results, clean both mating connectors before insertion and check the link with an optical power meter after installing the attenuator. Avoid repeated unnecessary mating cycles to preserve ferrule lifespan, and store unused units in protective caps when not fitted.