BlueLAN 40G QSFP+ Direct Attach Copper Cable, 1m, Lenovo/Mellanox Compatible (ARZF-BL)

High-density 40 Gigabit Ethernet and InfiniBand links often fail because of expensive optics and fragile fiber. This BlueLAN direct attach copper cable solves that by delivering a reliable 40GBASE-CR4 connection in a single, low-cost assembly. It plugs directly into QSFP+ ports on Lenovo and Mellanox switches, NICs, and servers, eliminating separate transceivers and reducing both latency and power draw.

Who is it for

Data center operators, HPC cluster builders, and network engineers who need short-reach 40G interconnects between racks or adjacent equipment. It suits anyone replacing vendor-branded DACs or building cost-effective leaf-spine fabrics.

Main features

• 40 Gbps aggregate bandwidth over four 10 Gbps lanes
• Passive copper design with <0.5W power consumption per end
• QSFP+ to QSFP+ connectors, hot-pluggable
• 1 meter length, 30 AWG conductors, PVC jacket
• EEPROM coded for Lenovo and Mellanox compatibility
• Supports Ethernet and InfiniBand protocols
• Operating temperature 0°C to 70°C

Specifications

• Standard: IEEE 802.3ba 40GBASE-CR4
• Impedance: 100 Ohm
• Wire gauge: 30 AWG
• Jacket material: PVC
• MTBF: >2,000,000 hours

Tips

Use this cable for links up to 1 meter inside a rack or between adjacent racks. For longer distances, consider active optical cables. Verify your equipment's QSFP+ port supports passive copper DACs before ordering.