DAC Cable BlueOptics DAC-QSFP-40G-5M-BL 5m QSFP Male/Male

The BlueOptics DAC-QSFP-40G-5M-BL is a 5 meter direct attach copper (DAC) cable with QSFP male connectors on both ends, designed for short-distance, high-speed data links in racks and between adjacent racks. It supports 40GBase-CR4 electrical signaling and is intended for use with hardware platforms that accept QSFP-to-QSFP twinax copper connections. The cable is a passive 40G twinax type with 30 AWG conductors and provides a cost-effective, low-latency option for connecting switches, servers and storage systems within data center environments.

Advantages

The cable delivers reliable 40 Gbps connectivity over a 5 m distance while maintaining low power consumption and low latency typical of passive twinax DACs. It is MSA-compliant and built with shielded QSFP male connectors on both ends to ensure stable electrical connections. The design targets straightforward, maintenance-friendly installations with a reduced failure rate due to the absence of active components in the passive variant. Compatibility with major hardware platforms that support QSFP 40GBase-CR4 connections makes it a practical choice for short-reach interconnects in modern networks.

Suitable for

• Top-of-rack and adjacent-rack switch-to-switch connections
• Server-to-switch and server-to-storage links within a rack
• High-bandwidth, short-reach data center interconnects at 40 Gbps

Key specifications

• Length: 5 meters
• Connector type: QSFP male to QSFP male
• Data rate: up to 40 Gbps (40GBase-CR4)
• Cable type: passive twinax copper (DAC)
• Conductor gauge: 30 AWG
• MSA-compliant design

How to use

Install the BlueOptics DAC-QSFP-40G-5M-BL by inserting each QSFP male connector into the corresponding QSFP port on compatible switches, servers or storage devices. Ensure both endpoints officially support passive QSFP twinax connections and the 40GBase-CR4 electrical protocol. Route the cable within rack channels or cable management trays to avoid sharp bends and mechanical stress. No external power or configuration on the cable itself is required; link negotiation and protocol handling are managed by the connected equipment.

Recommendations

Verify hardware compatibility and port support for passive QSFP DACs before deployment. Maintain bend radius as specified by the equipment manufacturer and avoid excessive pulling force during installation. For high-availability links, test the cable in your environment to confirm stable 40 Gbps operation and monitor link status through your network devices.