DAC Cable BlueOptics DAC-Q28-100G-3M 100G 3m QSFP28 Male

The BlueOptics DAC-Q28-100G-3M 100G 3m QSFP28 Male is a 3-metre direct attach copper (DAC) cable designed for short-reach, high-bandwidth interconnections. With QSFP28 connectors on both ends, the cable supports 100 Gigabit Ethernet and compatible InfiniBand links, providing a low-latency, energy-efficient option for switch-to-switch, switch-to-server and server-to-server connections in rack environments.

Advantages

This 3 m DAC cable offers native QSFP28 connectivity for 100G data rates without the need for optical transceivers, reducing power consumption and component count. Its fixed-length copper design provides predictable performance with low latency and minimal signal conditioning, suitable for dense rack deployments. The cable’s robust assembly ensures reliable mechanical connection and consistent electrical characteristics for high-speed links.

Suitable for

Key specifications

How to use

Install the DAC cable by inserting each QSFP28 connector firmly into the corresponding QSFP28 port until the latch engages. Ensure both network devices are powered down or support hot-plugging according to their documentation before connecting. After physical installation, verify link status through the devices’ management interfaces and configure interfaces for 100G operation if required. For optimal signal integrity, avoid tight bends and maintain recommended bend radius for the cable.

Recommendations

Use this DAC cable for short-distance, high-throughput connections within racks or between adjacent racks. Confirm compatibility with your switches and servers’ QSFP28 ports and, when possible, check vendor documentation for any required firmware or compatibility lists. Route the cable to minimize stress on connectors and avoid sources of excessive heat or mechanical strain.