InfiniBand cable CBO 100G-Q28-S28-C-0501-BL 5 m QSFP28 to 4×SFP28

Copper InfiniBand cable by BlueOptics with a QSFP28 connector on one end and four SFP28 connectors on the other. The 5 m active/passive cable is designed for 100 Gbps links in data centers and high-performance computing environments and enables direct connectivity between QSFP28 ports and multiple SFP28 devices without additional transceivers. The cable supports high-throughput, low-latency connections for servers, switches and storage systems and is intended for short-reach, rack-to-rack or within-rack interconnects.

Advantages

The cable delivers a consolidated 100 Gbps link using a single QSFP28 interface split into four SFP28 channels, reducing the need for separate optical transceivers and simplifying cable management. Its copper construction provides power-efficient, low-latency signal transmission suitable for switch-to-server and top-of-rack interconnects. The fixed 5 m length balances flexibility and signal integrity for typical data center rack layouts.

Suitable for (tasks / use cases)

• Connecting a QSFP28 port on a switch to multiple SFP28 ports on servers or storage nodes
• Short-reach data center interconnects within or between racks
• High-performance computing clusters requiring low-latency links
• Environments where reducing transceiver count and simplifying cabling is desired

Key specifications

• Cable type: Copper InfiniBand active/passive breakout cable
• Connectors: QSFP28 (one end) to 4 × SFP28 (other end)
• Aggregate data rate: 100 Gbps
• Length: 5 metres
• Typical application: Short-reach, rack-level interconnects for data centers and HPC
• Latency: Low, suitable for latency-sensitive applications

How to use

Insert the QSFP28 connector into the corresponding QSFP28 port on a switch or adapter, and plug each SFP28 connector into the target server or storage port. Ensure connectors are fully seated and that devices support breakout operation from QSFP28 to multiple SFP28 ports. Verify link status and negotiate appropriate link speeds on connected devices. Handle the cable by the connector bodies to avoid stressing the contacts and maintain gentle bend radii during routing to preserve signal integrity.

Usage recommendations

Use the cable for short-reach interconnects inside racks or between adjacent racks; avoid extended runs beyond the specified 5 m. Confirm device compatibility for QSFP28-to-SFP28 breakout functionality and check switch firmware or adapter settings if links do not come up. Store and route the cable to prevent sharp bends and excessive tension, and power down or disable ports before plugging or unplugging to reduce risk of hardware issues.