SFP28 direct-attach copper cable CBO SFP28-DAC-5M-CH-BL 5 m Male-to-Male 25 Gbit/s

The BlueOptics SFP28 direct-attach copper cable CBO SFP28-DAC-5M-CH-BL is a 5-metre passive twinax cable with SFP28 Male-to-Male connectors designed for 25 Gbit/s links. It is intended for short-reach interconnects in data centre environments, offering a compact, low-latency physical connection for servers, switches and storage systems within a rack or between adjacent racks. The cable provides a fixed, tested electrical channel that simplifies port-to-port connectivity without the need for optical transceivers.

Advantages

This direct-attach cable delivers reliable 25 Gbit/s performance with minimal latency and power consumption compared with active or optical alternatives. Its fixed-length, factory-terminated construction reduces installation time and eliminates the need to manage separate transceivers and patch cords. The male-to-male SFP28 connectors ensure direct compatibility with SFP28 ports on networking equipment that support passive DACs, and the 5 m length is suitable for common rack-to-rack and within-rack runs.

Suitable for

• Short-reach server-to-switch connections within a rack
• Switch-to-switch links between adjacent racks
• Storage array connections requiring 25 Gbit/s bandwidth
• High-density top-of-rack deployments where latency and power efficiency matter

Key specifications

• Connector type: SFP28 Male-to-Male
• Length: 5 metres
• Data rate: 25 Gbit/s (per cable)
• Cable type: Passive twinax / direct-attach copper
• Typical use: Short-reach intra-rack and adjacent rack interconnects
• Latency: Low, electrical connection

How to use

Insert each SFP28 connector into the matching SFP28 port on your network devices until the latch clicks to secure the connection. Ensure both devices support passive direct-attach copper cables and are configured for 25 Gbit/s operation. Route the cable to avoid sharp bends and keep it clear of hot airflow paths inside racks. If link negotiation does not complete, verify port settings, check for connector seating, and consult equipment documentation for compatibility settings or firmware requirements.

Recommendations

Use this 5 m SFP28 DAC for short, fixed-length links where low latency and power efficiency are priorities. Avoid exceeding the recommended bend radius, and do not use the cable in environments with excessive mechanical stress or exposure to liquids. For longer runs or when optical isolation is required, consider optical transceivers and fibre cabling instead.