CBO SFP28 passive copper DAC cable SFP28-DAC-1M 1 m, direct-attach twinax for 25Gbps links

CBO SFP28 passive copper DAC cable SFP28-DAC-1M is a 1 m direct-attach twinax cable for SFP28 ports, engineered for short-reach 25Gbps links. The passive design requires no additional power or active electronics, delivering a low-latency physical connection between compatible switches, network interface cards and servers. This cable is intended for cost- and energy-conscious deployments where reliable, short-distance connectivity is needed within racks or between adjacent racks.

Advantages

The CBO SFP28 passive twinax provides a stable 25Gbps channel with minimal signal processing overhead, offering low latency and consistent performance for high-throughput applications. Its 1 m length minimizes excess cable slack in dense rack environments and simplifies cable management. Being a passive direct-attach solution, it consumes no additional power compared with active modules and reduces total system cost while maintaining interoperability with standard SFP28 ports.

Suitable for

• Rack-to-rack short-distance 25Gbps links in data centers
• Within-rack connections between switches, servers and NICs
• High-throughput, low-latency applications such as virtualization and storage networks
• Cost-sensitive environments that favour energy-efficient cabling

Key specifications

• Connector type: SFP28 direct-attach twinax
• Data rate: 25 Gbps per channel
• Cable type: Passive copper twinax
• Length: 1 meter
• Use case: Short-reach, within-rack and adjacent-rack connections
• Latency: Low, due to passive direct-attach design

How to use

Insert each SFP28 connector into the corresponding SFP28 port on your switch, server or network interface card until it latches. Ensure both ends are connected to compatible SFP28 ports configured for 25Gbps operation. No external power or transceivers are required. Verify link status on the connected devices and confirm that interface settings (speed and duplex where applicable) match the intended 25Gbps operation. Route the cable to avoid sharp bends and excessive tension to maintain signal integrity.

Recommendations

For reliable performance, use this passive DAC for short-distance links up to 1 m in rack or adjacent-rack deployments. Avoid tight bends and mechanical stress, and ensure compatibility with your equipment vendor’s SFP28 port support. In high-density deployments, document cable locations and secure cables to prevent accidental disconnection.