Network Cable BlueLAN Coriant QSFP28-4SFP28-DAC-2M Direct Attach 100GBASE-CR4 2m Blue

The BlueLAN Coriant QSFP28-4SFP28-DAC-2M Direct Attach cable is a passive breakout solution for short-reach, high-bandwidth interconnects. One end terminates in a QSFP28 connector and the other end breaks out to four SFP28 connectors, enabling a single 100G port to connect to up to four 25G ports. The cable is 2 meters long, built with AWG26 construction, and designed to meet 100GBASE-CR4 and 25GBASE-CR electrical requirements for reliable transmission in rack-to-rack and within-rack deployments.

Advantages

This passive DAC cable provides low-latency, low-power interconnection without the need for optical transceivers or additional modules. The breakout configuration simplifies migration from 25G to 100G architectures by allowing flexible port mapping and consolidation. Its AWG26 conductor and 2 m length minimize insertion loss and maintain signal integrity for short-reach copper links in data center topologies.

Suitable for

• Connecting a 100G QSFP28 switch port to multiple 25G SFP28 server or switch ports
• Top-of-rack and end-of-row short-reach interconnects in data centers
• High-performance computing clusters needing high-bandwidth, low-latency links
• Environments where low power consumption and minimal latency are priorities

Key specifications

• Cable type: Passive direct attach copper breakout
• Connector configuration: QSFP28 to 4 × SFP28
• Supported standards: 100GBASE-CR4 and 25GBASE-CR
• Length: 2 meters
• Conductor size: AWG26
• Typical use: Short-reach rack-to-rack or within-rack links

How to use

Power down or follow hot-swap procedures defined by your equipment vendor before inserting the cable. Plug the QSFP28 end into the 100G port and the four SFP28 ends into the corresponding 25G ports, ensuring secure seating and correct orientation. Verify link status on connected devices and confirm negotiated speeds and lane mapping in the switch or host interface management. For best results, route the cable to avoid sharp bends, excessive tension, and proximity to sources of electromagnetic interference.

Usage recommendations

Use this passive breakout cable for short-distance connections inside racks or between adjacent racks. Ensure compatibility with your switch and server optics policy, check port mapping requirements for your network design, and adhere to vendor guidelines for hot-plugging and cable handling to maintain performance and avoid damage.