Direct Attach Cable (DAC) CBO SFP28-DAC-2M Marconi, passive 2 m, SFP28 twinax

CBO Marconi SFP28-DAC-2M is a 2-meter passive SFP28 Direct Attach Cable (DAC) designed for short-reach high-speed connections. The cable uses a twinax copper construction and is compatible with SFP28 ports, enabling 25 Gbps links between servers and switches or switch-to-switch interconnects within racks and data centers. The passive design provides a low-latency physical connection with no active optics, supporting plug-and-play installation and reduced power consumption compared with optical transceivers.

Advantages

The DAC offers direct electrical connectivity with minimal latency and stable signal integrity over short distances. Its SFP28 form factor ensures compatibility with SFP28 ports and straightforward installation without additional transceivers. Being a passive twinax cable, it consumes no extra power for signal conversion and typically reduces total cost of ownership for short-reach 25 Gbps links in dense rack environments.

Suitable for

• 25 Gbps server-to-switch connections in data center racks
• Switch-to-switch interconnects within the same rack or adjacent racks
• Short-reach high-density top-of-rack deployments
• Environments prioritizing low latency and reduced power consumption

Key specifications

• Interface: SFP28 twinax (SFP28 connectors at both ends)
• Length: 2 meters
• Data rate: 25 Gbps per link
• Type: Passive twinax copper direct attach cable
• Typical use: Short-reach, rack-level interconnects

How to use

Install the SFP28-DAC-2M by inserting each SFP28 connector into the corresponding SFP28 port on the devices to be connected. Ensure that both ports support SFP28 passive DACs and that link settings on connected equipment match the intended 25 Gbps operation. The cable is plug-and-play; after seating the connectors, verify link LEDs or management interfaces to confirm a successful connection.

Recommendations

Use this passive DAC for short, rack-level connections where 2 m length is sufficient. Avoid running the cable near high electromagnetic interference sources and do not bend the cable sharply; follow the manufacturer's minimum bend radius. Verify device compatibility with SFP28 passive DACs in switch or server documentation before deployment.