BlueLAN QSFP+ 40G Direct Attach Cable 3m, 40GBASE-CR4, Twinax Copper, Passive, H3C Compatible QSFP-40G-3M-CM-BL

This QSFP+ Direct Attach Cable delivers 40 Gbps over a 3-meter twinax copper link, providing a cost-effective, low-latency solution for short-reach 40GBASE-CR4 Ethernet or InfiniBand QDR connections. Its passive design consumes under 0.5W, making it ideal for high-density data center racks.

Advantages

With a 30 AWG twinax copper construction, this cable offers reliable signal integrity and a 100 Ohm impedance. It is hot-swappable and operates within a 0°C to 70°C range, ensuring flexibility and durability in demanding environments. The QSFP+ connectors on both ends enable direct attachment between switches, servers, and storage devices without the need for separate transceivers.

Suitable for

• Data center top-of-rack switching
• High-performance computing clusters
• Storage area networks
• H3C network equipment

Key specifications

• Connector type: QSFP+ to QSFP+
• Data rate: 40 Gbps
• Ethernet standard: 40GBASE-CR4
• Cable length: 3 meters
• Wire gauge: 30 AWG
• Cable type: Twinax copper
• Protocols: Ethernet, InfiniBand QDR
• Impedance: 100 Ohm
• Power consumption: <0.5W
• Operating temperature: 0°C to 70°C

Recommendations

For short-distance 40G links within a rack or between adjacent racks, this passive DAC offers an energy-efficient and economical alternative to optical transceivers. Verify compatibility with your H3C equipment before deployment.