DAC cable CBO SFP28-DAC-1M 1 m passive copper SFP28 to SFP28

Passive copper DAC cable CBO SFP28-DAC-1M is a 1 m direct-attach twinax cable terminated with SFP28 connectors on both ends. It is built for short-reach 25GbE interconnects between switches, servers or NICs and removes the need for separate optical transceivers by providing a direct electrical link. The compact, low-profile design suits high-density environments and offers a cost-effective, low-power option for data centre top-of-rack links and adjacent rack connections.

Advantages

The cable delivers low latency and reduced power consumption compared with optical solutions because it is a passive copper twinax assembly. Its 1 m length minimises signal attenuation for short connections and the SFP28 connector compatibility ensures straightforward plug-and-play installation into standard SFP28 ports. The assembled cable supports stable 25 Gigabit Ethernet connectivity while simplifying inventory and lowering per-port cost in dense deployments.

Suitable for

• Top-of-rack switch-to-switch or switch-to-server 25GbE links
• High-density server racks where short copper interconnects are required
• Connections between NICs and adjacent switches or patch panels
• Environments seeking low-power, low-latency direct-attached links

Key specifications

• Interface: SFP28 to SFP28
• Length: 1 metre
• Type: Passive copper direct-attach (twinax)
• Data rate support: 25 Gigabit Ethernet
• Form factor: SFP28 compatible plugs on both ends
• Typical use range: short-reach / adjacent rack or same-rack connections

How to use

Insert each SFP28 connector into the corresponding SFP28 port on the devices to be interconnected, ensuring the latch engages. No separate transceivers, optical modules or cable adapters are required. After physical insertion, verify link status and speed on the connected devices and configure network settings as needed. For multiport switch deployments, route the cable to avoid tight bends and maintain manufacturer-recommended bend radii to preserve signal integrity.

Recommendations

Use this 1 m passive DAC cable for direct short-range 25GbE connections in rack-to-rack or intra-rack setups. Avoid exceeding the recommended bend radius, ensure proper port seating, and select this passive twinax option where power efficiency and cost per port are priorities over longer-distance reach.