DAC cable CBO QSFP28-DAC-3M 3 m passive copper QSFP28 to QSFP28

The DAC cable CBO QSFP28-DAC-3M is a 3 meter passive copper Direct Attach Cable designed for QSFP28 ports. It provides a short-reach, low-latency electrical connection for 100 Gigabit Ethernet links between switches, routers and servers in data center environments. The cable is intended for scenarios where optical transceivers are unnecessary and a cost-effective, power-efficient alternative is preferred.

Advantages

This passive QSFP28 to QSFP28 cable offers predictable latency and low power consumption because it contains no active optical components. Its fixed 3 m length simplifies planning for rack-to-rack or shelf-to-shelf interconnects while reducing the need for separate transceivers. The copper assembly supports 100GbE data rates and is compatible with standard QSFP28 interfaces, enabling plug-and-play installation and reliable electrical signalling for short-distance links.

Suitable for

• Short-reach 100 Gigabit Ethernet connections inside racks and between adjacent racks
• Data center Top-of-Rack and spine-leaf interconnects
• Connections between QSFP28-capable switches, routers and servers
• Environments where low latency and low power consumption are required

Key specifications

• Connector type: QSFP28 to QSFP28 (copper DAC)
• Length: 3 meters
• Transmission rate: supports 100GbE
• Cable type: passive twinax copper assembly
• Typical usage: short-reach electrical interconnects within racks and data halls

How to use

Install the DAC cable by inserting each QSFP28 plug into the corresponding QSFP28 port on your network devices until the latch engages. Ensure both ends are seated securely and that devices are powered and configured for 100GbE operation. No additional modules, power supplies, or fibre patching are required. Use proper handling to avoid sharp bends and excessive pulling; route the cable to prevent mechanical stress and maintain signal integrity.

Usage recommendations

Verify compatibility with your equipment vendor’s QSFP28 port guidelines before deployment. Maintain bend radius and avoid kinking; keep the cable away from sources of electromagnetic interference for optimal performance in high-density racks.