DAC cable CBO DAC-Q28-4SFP28-25G 3 m — direct attach copper, 4× SFP28, 25Gbps per lane

CBO DAC-Q28-4SFP28-25G is a 3-meter direct attach copper (DAC) cable with four SFP28 connectors, engineered for short-reach 25 Gbps per lane links. The assembly is intended for use in data center and enterprise network environments where low latency, predictable performance and energy-efficient interconnects are required. It supports multi-lane configurations and is suitable for connecting switches, servers and within-rack equipment without the need for optical transceivers.

Advantages

This direct attach copper cable delivers high-density, low-latency connectivity while consuming less power than equivalent optical modules. Its fixed-length 3 m copper construction reduces signal conversion overhead and simplifies cabling between adjacent racks or devices within the same rack. The integrated SFP28 connectors provide compatibility with equipment that accepts SFP28 form-factor modules and allow multi-lane 25 Gbps operation with a single cable assembly.

Suitable for

• Short-reach switch-to-switch connections in top-of-rack and leaf-spine architectures
• Server-to-switch links inside racks or between adjacent racks
• High-density patching in data center topologies requiring 25 Gbps per lane

Key specifications

• Cable type: direct attach copper (DAC)
• Connector type: four SFP28 connectors (fixed-assembly)
• Per-lane data rate: 25 Gbps
• Aggregate lanes: quad-lane configuration
• Length: 3 meters
• Typical use: short-reach, within-rack or adjacent-rack links

How to use

Install the cable by inserting each SFP28 connector into the corresponding SFP28 ports on the devices to be linked, ensuring the connectors are fully seated and retention latches engage. Verify link negotiation and speed settings on the connected equipment, and check that the network interfaces report 25 Gbps per lane as expected. Route the cable to avoid sharp bends and maintain recommended bend radius to preserve signal integrity. No additional transceivers or power supplies are required for operation.

Usage recommendations

For reliable performance, use this DAC cable within its intended short-reach range and in environments with compatible SFP28-capable switches or NICs. Avoid exceeding the specified bend radius, keep the cable away from sources of strong electromagnetic interference, and verify compatibility with your equipment vendor's supported DAC assemblies when required by policy.