DAC cable CBO SFP28-DAC-0.5M 0.5m passive copper SFP28 to SFP28

CBO SFP28-DAC-0.5M is a 0.5 m passive copper direct attach cable with SFP28 connectors at both ends. Designed for use with 25GbE or other compatible SFP28 ports, this DAC cable provides a short-reach point-to-point connection between switches, servers, and network interface cards. Its passive copper design delivers low latency and reduced power consumption compared with active optical solutions, while offering a compact, reliable cabling option for high-density rack environments.

Advantages

The passive SFP28-to-SFP28 cable enables plug-and-play installation without additional transceivers or configuration. Its short 0.5 m length minimizes signal loss and electromagnetic exposure in tight rack layouts and supports stable, board-level connectivity for high-speed data transfer. Compared with active or optical alternatives, the copper DAC provides lower power requirements and predictable performance at a lower total cost of ownership for short-reach links.

Suitable for

• Interconnecting top-of-rack switches within the same rack or adjacent racks
• Connecting servers to switch ports or NICs for 25GbE links
• High-density rack installations requiring low-latency short links
• Lab environments and test benches needing reliable, repeatable connections

Key specifications

• Connector type: SFP28 on both ends
• Cable type: Passive copper direct attach cable (DAC)
• Length: 0.5 metres
• Data rate: Suitable for 25 Gigabit Ethernet and compatible SFP28 rates
• Form factor: Twin-ax copper assembly for direct board-level connections
• Latency: Low-latency design appropriate for short-reach interconnects

How to use

Install the cable by inserting each SFP28 connector into the corresponding SFP28 port on the devices to be linked. Ensure the ports are powered and that any required port settings on switches or host adapters are enabled for 25GbE operation. The passive DAC requires no external power or additional modules; once seated, the link should be recognized by standard network hardware and firmware implementing SFP28 compatibility.

Recommendations

Use this 0.5 m passive SFP28 DAC for short, direct links inside racks or between adjacent racks. Avoid bending the cable sharply near the connectors and maintain the recommended bend radius to preserve signal integrity. Confirm device compatibility with SFP28 passive copper assemblies in firmware or interoperability lists before deployment.