BlueOptics SC282701L1M26-BL InfiniBand fibre optic cable 1 m QSFP28 4xSFP28 Male Male

The BlueOptics SC282701L1M26-BL InfiniBand fibre optic cable is a 1 m direct attach solution combining a QSFP28 connector on one end with four SFP28 connectors on the other. Designed for short-reach high-speed links, the cable supports 100G aggregate bandwidth using a 4x25G lane configuration and is intended for use in rack and adjacent-rack interconnects where reliable, low-latency connectivity is required. The male-to-male connector configuration enables straightforward integration into existing hardware that accepts QSFP28 and SFP28 ports.

Advantages

This cable provides a compact, low-power connection for short-distance links, offering the functional equivalent of a passive 100G twinax direct attach cable while using InfiniBand and 100GBase-CR4 / 4x25GBASE-CR signalling conventions. Its construction follows MSA practices for connector compatibility and uses high-quality components to deliver consistent performance and long service life. The passive design ensures minimal additional power draw and low latency compared with active transceiver-based solutions.

Suitable for

• Short-range server-to-switch and switch-to-switch links within racks or between adjacent racks
• High-performance computing and InfiniBand fabrics requiring 100G aggregate throughput
• Storage systems and routers that accept QSFP28 and SFP28 direct attach connections

Key specifications

• Cable length: 1 meter
• Connector types: QSFP28 (male) to 4 × SFP28 (male)
• Aggregate data rate: up to 100 Gbps (4 × 25 Gbps lanes)
• Cable type: passive direct attach (twinax) suitable for short distances
• Wire gauge: 26 AWG
• MSA-compliant connector and mechanical design
• Low power consumption and low latency compared with active optics

How to use

Insert the QSFP28 end into a compatible QSFP28 port and plug the four SFP28 ends into the corresponding SFP28 ports of the target device. Ensure both ends are fully seated and that the host hardware supports passive direct attach or InfiniBand/100GBase-CR4 signalling as required. No additional configuration is needed for basic electrical link establishment, but verify link speed and lane mapping in the host device firmware or operating system to confirm 4×25G operation.

Recommendations

Use the cable for short interconnects within racks or between adjacent racks to maintain low latency and low power consumption. Verify device compatibility with passive twinax DACs and confirm that port firmware supports 100G via QSFP28 to 4×SFP28 split configurations. Avoid tight bends and mechanical strain; maintain minimum bend radius to preserve signal integrity and maximize service life.