Cisco QSFP-H40G-CU5M 40GBASE-CR4 QSFP Direct-Attach Copper Cable 5m

The Cisco QSFP-H40G-CU5M is a 40GBASE-CR4 direct-attach copper (DAC) cable designed for cost-effective, high-performance connectivity in data center environments. This passive copper cable provides direct electrical connections between QSFP+ ports on switches, routers, and line cards, eliminating the need for active optics or separate transceiver modules for short-reach deployments.

Optimized for intra-rack and adjacent-rack connectivity in spine-leaf and top-of-rack (ToR) architectures, the cable delivers full 40 Gbps aggregate throughput across four 10 Gbps lanes. The passive design ensures minimal latency and power consumption, making it ideal for high-density switch interconnections where thermal and electrical budgets are constrained.

The 5-meter length bridges typical rack-to-rack distances in enterprise data centers while maintaining signal integrity and backward compatibility with existing QSFP+-equipped infrastructure. This cable remains widely deployed in brownfield DC refreshes and new builds targeting cost-optimized fabric density.

Ideal for

• Spine-leaf fabric interconnections within 5-meter radius in modular data center designs
• Top-of-rack (ToR) switch uplink connections to core or spine layer switches
• Adjacent-rack server cluster connectivity for high-performance computing (HPC) and analytics workloads
• Direct attachment between line cards and fabric modules in modular switching platforms
• Intra-chassis connections in chassis-based switch systems with distributed forwarding engines
• Cost-optimized 40G connectivity for virtualization hosts and storage array front-end networks

Technical specifications

Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.