Direct Attach Copper (DAC) Cable CBO SFP28-DAC-2M 2 m Passive SFP28 to SFP28

CBO SFP28-DAC-2M is a 2 meter passive Direct Attach Copper (DAC) cable with SFP28 connectors on both ends, designed for short-reach interconnects in rack and data centre environments. The cable supports 25 GbE and 32 Gb/s interfaces that use SFP28 ports and provides a low-latency, energy-efficient wired link between switches, servers or network interface cards. As a passive assembly, it requires no external power or optical transceivers, offering a simple and cost-effective option for point-to-point connections within the same rack or adjacent racks.

Advantages

The passive copper construction delivers low latency and predictable performance for short-distance links while consuming no additional power for active components. Integrated SFP28 connectors reduce the number of components to install and eliminate the need for separate transceivers, lowering both capital and operational expenses. The fixed 2 m length simplifies cable management in rack deployments and reduces signal loss compared with longer copper runs or unsuitable cable types.

Suitable for

• 25 Gigabit Ethernet server-to-switch connections
• High-speed inter-switch links within a rack or between adjacent racks
• Direct connections between NICs and top-of-rack switches
• Short-reach storage and compute clusters requiring low-latency links

Key specifications

• Connector type: SFP28 to SFP28
• Cable type: Passive copper Direct Attach Cable
• Nominal data rate: suitable for 25 GbE and compatible 32 Gb/s interfaces
• Length: 2 metres
• Typical use: short-reach, rack-level interconnects

How to use

Inspect both SFP28 ports on the devices to confirm compatibility and ensure ports are clean and free of debris. Align each SFP28 connector with the device port and insert until the latch engages. Verify link status through the device management interface or LEDs; no additional configuration is required beyond standard port setup. For safe removal, use the connector latch to disengage and pull the cable straight out to avoid stressing the connector or port.

Recommendations

Use the cable for short-distance connections within the same rack or between adjacent racks only; avoid using passive DACs for longer links. Maintain bend radii according to manufacturer guidance, avoid kinking, and keep the cable away from sources of electromagnetic interference to preserve signal integrity and performance.