Passive SFP28 DAC cable CBO SFP28-DAC-2M 2 m, copper direct attach for 25GbE ports

This passive SFP28 DAC cable CBO SFP28-DAC-2M is a 2 m copper direct-attach cable designed for SFP28 ports and 25GbE networks. It provides a short-reach physical connection between compatible switches, routers and network interface cards without active electronics in the link. The cable is intended for low-latency, power-efficient links in rack environments where cost-effectiveness and reliable point-to-point connectivity are required.

Advantages

The passive construction reduces power consumption and heatsink requirements compared with active optical transceivers, while maintaining predictable latency and signal integrity over short distances. Being a direct-attach copper solution, the cable delivers straightforward plug-and-play deployment, minimal configuration and lower acquisition cost relative to fibre transceivers and separate optics. Its fixed 2 m length simplifies planning for rack-to-rack or within-rack connections.

Suitable for

• Top-of-rack switch to server links
• Rack-to-rack interconnects within the same equipment room
• Direct connections between network interface cards and SFP28 ports
• Short-reach 25GbE uplinks and aggregation ports

Key specifications

• Connector type: SFP28 copper direct-attach
• Cable length: 2 metres
• Supported data rate: 25 Gbps per lane (25GbE)
• Cable medium: Twinax copper
• Latency: Low, suitable for short-reach applications
• Power: Passive (no active components in the cable)
• Typical deployment: Short-distance, within-rack or adjacent racks

How to use

Insert each SFP28 connector into the corresponding SFP28 port on the devices to be connected, ensuring the latch engages. No additional configuration is required on most switches and servers; the link will negotiate 25GbE if both ends support the speed. Route the cable to avoid sharp bends and mechanical strain, and verify link status via device LEDs or management interfaces after installation. For hot-plug operations, follow your equipment manufacturer's guidelines.

Recommendations

Use this passive SFP28 DAC cable for short, fixed-length connections where low latency and energy efficiency are priorities. Verify port compatibility with SFP28 direct-attach copper cables on both ends before installation and avoid exceeding the recommended bend radius to maintain consistent performance.