DAC cable CBO QSFP28-DAC-2M 2m passive copper for QSFP28 ports

CBO QSFP28-DAC-2M is a 2-metre passive copper Direct Attach Cable engineered for QSFP28 ports. The cable delivers a short-reach, low-latency 100GbE connection between devices equipped with QSFP28 interfaces, such as switches, routers and network interface cards (NICs). As a passive copper solution, it eliminates the need for separate optical transceivers and supports plug-and-play installation in densely packed data center and server rack environments while keeping power consumption minimal.

Advantages

The passive copper design offers low latency and reliable signal transmission for short-distance 100GbE links. Its 2 m length provides flexibility for inter-rack and intra-rack connections without excess slack. Being a Direct Attach Cable reduces component count and operational power compared with optical transceivers, simplifying cabling and maintenance. The QSFP28 form factor ensures compatibility with standard QSFP28 ports and supports a straightforward plug-and-play deployment.

Suitable for

• Short-reach 100 Gigabit Ethernet links in data centers
• Connections between QSFP28-equipped switches, routers and NICs
• Server-to-switch or switch-to-switch links inside racks
• Low-latency high-throughput links in HPC or virtualization environments

Key specifications

• Form factor: QSFP28 Direct Attach Cable (DAC)
• Length: 2 metres
• Cable type: Passive copper twinax
• Supported data rate: 100 Gigabit Ethernet (100GbE)
• Connector type: QSFP28 on both ends
• Typical use: Short-reach links within racks or between adjacent racks

How to use

Install the CBO QSFP28-DAC-2M by inserting each QSFP28 connector into the corresponding QSFP28 port on the devices to be linked. Ensure connectors are fully seated and the cable is routed to avoid sharp bends or excessive strain. The cable is designed for hot-plug use; devices will typically recognise the connection automatically and negotiate the 100GbE link. No additional transceivers or fibre patching are required.

Recommendations

For reliable operation, maintain bend radii recommended by the manufacturer and avoid running the cable near sources of strong electromagnetic interference. Use the 2 m passive DAC for short, high-bandwidth connections inside racks or between adjacent racks; for longer distances or mixed-media environments consider active optical solutions. Periodically inspect connectors for dust or damage and reseat if link issues occur.