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

Passive SFP28 DAC copper cable CBO SFP28-DAC-2M is a 2 metre direct-attach copper solution designed for 25GbE SFP28 ports. It provides a fixed, low-latency electrical interconnect between compatible switches, routers, servers and network interface cards without the need for separate transceivers. The passive design consumes no additional power for signal conversion and is intended for short-reach links inside racks or between adjacent racks in data centre and enterprise environments.

Advantages

The cable delivers low latency and consistent signal integrity suitable for high-bandwidth 25GbE links while simplifying rack cabling by eliminating separate optical transceivers. Its passive construction reduces power consumption and operating cost, and the pre-terminated twinax form factor ensures quick plug-and-play installation. The fixed 2 m length provides predictable channel loss and performance for short-range applications.

Suitable for

• Short-range 25GbE connections between top-of-rack switches and servers
• Interconnects between adjacent racks in data centres
• Direct connections to NICs, routers and storage servers with SFP28 ports
• Environment where low-latency, energy-efficient links are required

Key specifications

• Electrical interface: SFP28 compatible direct-attach copper
• Data rate: 25 Gigabits per second per lane
• Length: 2 metres
• Cable type: Passive twinax copper
• Connector style: SFP28 form factor, pre-terminated
• Typical use: Short-reach rack and adjacent-rack connections

How to use

Insert each SFP28 connector into compatible SFP28 ports on the two devices until the latch engages. Verify link status on connected equipment and confirm negotiated 25GbE speed in the device management interface. No external power or transceiver modules are required; the cable functions as a fixed electrical link. For proper operation, use with ports that explicitly support passive DACs and verify compatibility with the switch or server vendor if required.

Usage recommendations

Route the cable within rack cable management to avoid sharp bends and excessive stress; maintain the manufacturer's minimum bend radius. Use the 2 m length for intra-rack or adjacent-rack links; for longer distances select active DAC or fiber-optic transceivers. Inspect connectors for contaminants before insertion and power-cycle equipment only if link issues persist after verifying physical connections.