CBO QSFP28 Direct Attach Copper (DAC) cable 0.5 m for QSFP28 ports

CBO QSFP28 Direct Attach Copper (DAC) cable 0.5 m for QSFP28 ports provides a short, fixed copper connection for 100 Gigabit Ethernet links between compatible QSFP28 devices. The passive DAC design delivers low latency and deterministic performance without the need for separate optical transceivers, making it suitable for dense rack environments and short-reach interconnects such as top-of-rack and switch-to-switch links. The cable is plug-and-play and requires no additional configuration or power beyond the connected devices.

Advantages

This 0.5 m QSFP28 DAC cable offers a cost-effective and power-efficient alternative to optical modules for short-distance connections. Its direct-attach copper construction ensures low latency and predictable signal integrity for high-throughput environments. The compact length reduces cable management complexity in congested rack installations and supports hot-pluggable operation for quick replacement or reconfiguration.

Suitable for

• Top-of-rack interconnections in data centers
• Switch-to-switch 100GbE links within the same rack or adjacent racks
• High-performance computing clusters requiring low-latency links
• Short-reach aggregation and spine-leaf networking segments

Key specifications

• Connector type: QSFP28 to QSFP28 compatible
• Cable type: Direct Attach Copper (DAC), passive
• Length: 0.5 m
• Supported data rate: 100 Gigabit Ethernet
• Latency: minimal, suitable for low-latency applications
• Installation: hot-pluggable, plug-and-play

How to use

Install the cable by inserting each QSFP28 connector firmly into the QSFP28 ports of the devices to be linked. Ensure devices are powered and configured for 100GbE operation; the DAC cable itself requires no additional setup or external power. For best results, avoid sharp bends and mechanical stress at the connector ends and route the cable to minimize strain and interference from nearby power sources.

Recommendations

Use this 0.5 m QSFP28 DAC cable for short-distance links where a fixed copper connection is acceptable. Choose passive DACs for reduced cost and power use in dense rack environments; verify device compatibility with QSFP28 passive copper assemblies before deployment.