Direct Attach Copper Cable BlueOptics QSFP28 100GBASE-CR4 / InfiniBand EDR 30AWG, 2 m

The BlueOptics QSFP28 direct attach copper cable provides a 100G wired connection for short-reach data center and high-performance computing interconnects. Compliant with the 100GBASE-CR4 standard and compatible with InfiniBand EDR, this 2 meter DAC uses 30AWG conductors to deliver high bandwidth and low latency between servers, switches and storage devices. The cable is designed for plug-and-play integration in environments that require reliable, high-throughput links without the need for active transceivers.

Advantages

This BlueOptics QSFP28 DAC offers a cost-effective solution for 100G direct connectivity with minimal power consumption compared to active optical modules. The copper assembly provides predictable performance for short distances, low insertion latency, and straightforward cabling management due to the fixed 2 m length. Its support for 100GBASE-CR4 and InfiniBand EDR ensures interoperability with a wide range of modern networking and HPC equipment.

Suitable for

• Short-reach server-to-switch or switch-to-switch connections within data centers
• High-performance computing clusters using InfiniBand EDR
• Storage area networks and appliance interconnects requiring 100G bandwidth
• Rack-to-rack cabling where a 2 meter fixed-length DAC is appropriate

When it may not be suitable

This direct attach copper cable is intended for short-distance links and is not suitable for long-reach deployments or runs that exceed the 2 meter length. Environments that require optical isolation, fiber connectivity, or distances beyond the copper reach should use fiber-optic transceivers or active optical cables instead.

Key specifications

• Data rate: 100 Gbps using 100GBASE-CR4
• Connectivity type: QSFP28 to QSFP28 direct attach copper
• Protocol support: InfiniBand EDR compatible
• Conductor gauge: 30 AWG
• Length: 2 meters
• Cable type: Passive DAC (copper)

How to use

Install the cable by inserting each QSFP28 connector into the corresponding port on the equipment until the connector latches. Ensure both ends are fully seated and that the linked devices are configured to operate at 100G or InfiniBand EDR as required. No external power is needed for passive DAC operation. Route the cable to avoid sharp bends and mechanical stress; maintain the 2 m run within the rack or between adjacent racks according to your data center layout.

What to consider before purchase

• Confirm both devices support QSFP28 direct attach copper and the 100GBASE-CR4 or InfiniBand EDR standard.
• Verify that a 2 meter fixed cable length matches your rack or equipment layout.
• Check port compatibility on switches, servers, or storage appliances to ensure vendor interoperability.

Usage recommendations

Use this 2 m QSFP28 DAC for short-distance, high-bandwidth links inside racks or between adjacent racks. Avoid exceeding bend radius specifications, keep connectors free of dust, and confirm link settings on both ends for optimal performance.