Passive SFP28 DAC copper cable CBO SFP28-DAC-0.5M 0.5 m

Passive SFP28 DAC copper cable CBO SFP28-DAC-0.5M 0.5 m is a direct-attach copper interconnect designed for short-reach 25Gbps Ethernet links. The cable features SFP28 form-factor twin-axial assemblies on both ends and provides a low-latency, energy-efficient connection between network devices without requiring external transceivers or power. Intended for use inside racks and within top-of-rack or end-of-row deployments, this 0.5 m cable enables reliable wired connectivity for switches, servers and host bus adapters in high-density data center environments.

Advantages

The passive design delivers low power consumption and minimal heat generation compared with active optics, while keeping signal integrity suitable for short distances. Plug-and-play compatibility simplifies installation and reduces configuration time because no additional modules or external power are needed. The compact 0.5 m length reduces cable clutter in racks and improves airflow management. Constructed for standard SFP28 ports, the cable offers predictable latency and stable throughput for 25Gbps Ethernet applications.

Suitable for

• Direct connections between SFP28 ports on switches and servers
• Top-of-rack and end-of-row data center cabling
• High-density rack installations requiring short interconnects
• Low-latency network paths for storage and compute nodes

Key specifications

• Interface: SFP28 to SFP28 (copper DAC twin-ax)
• Nominal data rate: 25 Gbps
• Length: 0.5 m
• Connection type: Passive direct-attach (no external power)
• Typical use: Short-reach rack and data center links
• Latency: low, suitable for latency-sensitive applications

How to use

Power down is generally not required for hot-pluggable SFP28 ports, but follow your equipment vendor’s guidance for safe insertion and removal. Align each SFP28 connector with the port and press firmly until the latch engages. Verify link status through the switch or server management interface and monitor for expected 25Gbps operation. For best results, route the 0.5 m cable to avoid sharp bends and keep it clear of heat sources and moving components.

Recommendations

Use this passive DAC for short-distance connections inside racks and across adjacent rack units. Avoid using passive direct-attach cables beyond recommended distances for 25Gbps links; if longer runs are required consider active DACs or optical transceivers. Keep connectors clean and inspect latches before insertion to ensure reliable contacts and consistent performance.