DAC cable CBO QSFP28-DAC-0.5M 0.5m passive copper QSFP28 to QSFP28

Passive copper DAC cable CBO QSFP28-DAC-0.5M is a 0.5 m direct-attach cable with QSFP28 connectors at both ends, designed for short-reach 100GbE and compatible high-speed interconnects. The cable provides a compact, low-latency and low-power physical link between network devices without the need for optical transceivers. It is intended for short in-rack and top-of-rack connections in modern data center environments where reliable, cost-effective 100 Gbps links are required.

Advantages

This passive DAC cable delivers predictable latency and consistent electrical performance for short-distance 100 GbE links, while eliminating the additional power consumption and cost of optical modules. Its fixed length and integrated QSFP28 connectors simplify installation and reduce component count. The robust copper construction ensures stable signal integrity and mechanical durability suitable for dense rack environments.

Suitable for

• Short-reach 100GbE connections between switches
• Server-to-top-of-rack and in-rack high-speed links
• Low-latency interconnects in data centers
• Environments where power efficiency and minimal heat are priorities

Key specifications

• Connector type: QSFP28 to QSFP28
• Length: 0.5 m
• Transmission: passive copper direct-attach cable
• Data rate support: 100 Gbps and compatible high-speed protocols
• Use case: short-reach, in-rack and top-of-rack interconnects

How to use

Install the cable by inserting each QSFP28 connector into the corresponding QSFP28 port on your switches, routers or server NICs until the latch engages. Ensure both ends are fully seated and that cable routing avoids sharp bends and excessive strain. No additional configuration is required at the physical layer; verify link status via the device management interface and monitor for proper link speed and health.

Recommendations

For reliable performance, use this DAC cable for connections shorter than 1 m and within the same rack or adjacent racks. Maintain bend radii above manufacturer-recommended limits, avoid routing near high-heat sources, and verify compatibility with your equipment's QSFP28 port specifications before deployment.