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

The BlueOptics 40G-QSFP-QSFP-C-5M-BL is a 5 m direct attach cable (DAC) with QSFP connectors on both ends designed for short-reach, high-speed electrical links. As a passive 40GBase-CR4 twinax copper assembly with 30 AWG conductors and MSA-compliant QSFP terminations, this cable supports data transmission up to 40 Gbit/s over a 5 meter distance and is intended for use in racks and between adjacent racks in data centres and network equipment rooms.

Advantages

The cable provides a low-latency, low-power connection for compatible 40G QSFP ports without active electronics, resulting in reduced power consumption and simple installation. Built to MSA standards and populated with high-quality components, it is suitable for reliable short-distance links while offering a cost-effective alternative to active optical assemblies for supported platforms.

Suitable for

• Connecting 40G QSFP ports between switches in the same rack or adjacent racks
• Linking routers, storage systems and network adapters with QSFP interfaces
• Short-reach trunking and aggregation links in data centre top-of-rack and spine deployments
• Environments that require low latency and low power for 40G electrical links

Key specifications

• Length: 5 metres
• Connector type: QSFP to QSFP (male/male)
• Data rate: up to 40 Gbit/s (40GBase-CR4)
• Cable type: passive twinax copper (DAC)
• Conductor gauge: 30 AWG
• Compliance: MSA-compliant QSFP form factor

How to use

Install the cable by inserting each QSFP plug firmly into the corresponding QSFP port on the equipment until the latch engages. Ensure connected devices officially support passive 40G DAC twinax cables and the 40GBase-CR4 protocol. Route the cable within the rack to avoid sharp bends and mechanical stress; maintain the manufacturer’s recommended minimum bend radius. No external power or configuration is required on the cable itself — link activation and speed negotiation are handled by the devices at each end.

Recommendations

For reliable operation, verify compatibility with your switch, router or storage vendor and keep the cable within its rated 5 m distance. Avoid repeated tight bending, excessive pulling force, and exposure to liquids or corrosive environments. Use strain relief and tidy cable management to preserve connector and cable life.