Network Cable BlueOptics FN-CABLE-QSFP28-4SFP28-5 QSFP28 DAC 5m Black

The BlueOptics FN-CABLE-QSFP28-4SFP28-5 is a 5-metre direct attach copper (DAC) cable with QSFP28 to 4×SFP28 connectivity, engineered for short-reach 100G Ethernet links in data centre and enterprise network environments. The cable offers a fixed-length, low-latency connection that does not require transceivers, providing a compact and cost-efficient option for switch-to-switch, switch-to-server or server-to-server interconnects. Its black outer jacket and robust construction are intended for rack-mounted and patch-panel deployments where space and signal integrity are important.

Advantages

The cable provides reliable 100G connectivity with minimal signal loss and reduced power consumption compared with optical transceivers. Its direct-attach design eliminates the need for separate optical modules, simplifying installation and lowering equipment costs. The assembled connectors and reinforced jacket improve durability under frequent handling and within dense cabling runs, while the fixed 5 m length helps maintain predictable link characteristics and cable management in rack environments.

Suitable for

• 100G Ethernet short-reach links in data centres
• High-density rack patching between QSFP28 and multiple SFP28 ports
• Server-to-switch or switch-to-switch interconnects within the same rack or adjacent racks
• Environments where low latency and low power are required

Key specifications

• Cable type: QSFP28 to 4×SFP28 direct attach copper (DAC)
• Length: 5 metres
• Supported data rate: up to 100 Gbps
• Connector type: QSFP28 plug to four SFP28 plugs
• Jacket colour: black
• Design: fixed-length, factory-assembled twinax copper assembly

How to use

Install the cable by inserting the QSFP28 end into the QSFP28 port and the SFP28 ends into the corresponding SFP28 ports on your devices, ensuring each connector is fully seated and the latches engage. Verify that connected devices are powered and that port configurations support direct attach copper links and the intended 100G or breakout mode. Route the cable to avoid sharp bends, excessive tension and sources of electromagnetic interference. For reliable operation, confirm link status via device management interfaces after installation.

Usage recommendations

Use this DAC cable for short-reach, high-bandwidth connections within racks or between adjacent racks. Avoid kinking the cable or exceeding recommended bend radius; store and handle the assembly to prevent mechanical damage to the plugs and jacket. Confirm compatibility with host devices’ DAC support and breakout port modes before deployment.