CBO DAC SFP28-DAC-0.5M 0.5 m passive direct attach copper cable for SFP28 ports

Passive CBO DAC SFP28-DAC-0.5M is a 0.5 m direct attach copper cable designed for SFP28 ports. It provides a short-reach, low-latency electrical connection between compatible network devices and is intended for 25 Gigabit Ethernet environments. The cable uses a compact, passive construction that requires no external power or additional configuration, making it suitable for dense rack deployments and connections inside data center topologies where reliable, cost-effective interconnects are needed.

Advantages

The cable delivers low latency and stable signal integrity over short distances, supporting high-throughput links between switches and servers. Its passive design reduces power consumption compared with active optical or powered DAC options and simplifies installation since no driver or configuration is required. The 0.5 m length minimizes cable clutter in server racks and short patching runs, while SFP28 compatibility ensures straightforward plug-and-play interoperability with equipment that supports SFP28 interfaces.

Suitable for

• Short-reach switch-to-switch connections within a rack
• Switch-to-server links in data center top-of-rack configurations
• High-density cabling runs where short, fixed-length interconnects are needed
• 25 Gigabit Ethernet (.25GbE) uplinks and server connections

Key specifications

• Connector type: SFP28-compatible plug
• Cable type: Passive direct attach copper (DAC)
• Nominal length: 0.5 m
• Data rate support: 25 Gbps (per port)
• Typical use: Short-reach electrical interconnect for rack and data center environments
• Power requirements: Passive, no external power needed

How to use

Insert each SFP28 connector into the appropriate SFP28 port on the network devices until the module latches. Ensure devices are powered and configured to use the corresponding SFP28 interface. No additional drivers or external power are required for the passive cable itself. Verify link status on both devices and check port LEDs or management interfaces to confirm a stable 25GbE connection. For best signal performance, keep the cable run within the specified short-reach distance and avoid tight bends at the connector ends.

Recommendations

Install the cable in straight, untwisted runs and avoid sharp bends to maintain signal integrity. Use this 0.5 m passive DAC for intra-rack connections and short patching between adjacent devices; for longer distances or different power/active requirements, consider appropriate active DACs or optical transceivers.