CBO DAC Cable 9370CM40GCAB2-0030 40G QSFP direct attach copper cable, 0.3 m

CBO DAC Cable 9370CM40GCAB2-0030 is a 40G QSFP direct attach copper (DAC) cable designed for short-range, high-throughput interconnects. At 0.3 m length, this BlueOptics cable delivers a low-latency copper link between QSFP ports in switches, servers and storage systems. It provides a compact and energy-efficient option for short-distance 40 Gbps connections inside racks or between adjacent racks where optical transceivers are unnecessary.

Advantages

The direct attach copper construction ensures low latency and predictable signal integrity for 40 Gbps links while eliminating the need for separate transceivers. Its fixed 0.3 m length reduces clutter and simplifies cable management in dense rack environments. As a passive copper solution, it offers lower power consumption compared with active optical options and straightforward plug-and-play installation with standard QSFP ports.

Suitable for

• Short-range connections between QSFP-enabled switches and routers
• Direct links between servers and top-of-rack switches
• High-density rack-to-rack or intra-rack 40 Gbps interconnects
• Data center aggregation and leaf-spine architectures requiring short copper runs

Key specifications

• Interface type: QSFP to QSFP direct attach copper
• Rated data rate: 40 Gbps
• Length: 0.3 m
• Cable medium: copper twinax
• Latency: low, suitable for latency-sensitive short links
• Power: passive (no external power required)
• Compatibility: QSFP ports in switches, servers and storage appliances supporting 40G DAC

How to use

Ensure both devices support QSFP 40G direct attach copper connections. Align the QSFP connectors and insert each end firmly into the corresponding QSFP port until the latch engages. No additional configuration is required for basic link establishment; connected devices will negotiate the 40 Gbps link according to their port settings. For replacement or reinstallation, power down or follow hot-swap procedures recommended by the equipment vendor if required, then gently disengage the latch and remove the cable.

Recommendations

Use this 0.3 m DAC cable for short, fixed-length connections where optical transceivers are not needed. Avoid tight bends and excessive pulling; maintain bend radius recommended for twinax copper to preserve signal integrity. Verify device firmware and port compatibility with 40G QSFP DACs before deployment.