InfiniBand/fibre optic cable BlueOptics 40G-QSFP-QSFP-C-00501-BL 0.5 m Male/Male

The BlueOptics 40G-QSFP-QSFP-C-00501-BL is a 0.5 m InfiniBand/fibre optic direct attach cable with QSFP male-to-male connectors designed for short-range, high-speed links in data centers and high-performance computing environments. It supports up to 40 Gbit/s throughput using a 40GBase-CR4 electrical twinax topology and is compatible with hardware platforms that accept QSFP-to-QSFP direct attach cables.

Advantages

This 0.5 m cable provides low-latency, high-bandwidth connectivity for adjacent rack or in-rack connections. Constructed to MSA-compliant specifications and assembled from recognized component suppliers, the cable offers reliable signal integrity for Ethernet, FCoE, Fibre Channel and InfiniBand applications up to 40 Gbit/s on short distances. Passive twinax design reduces power consumption and the number of active components, resulting in a simple, robust solution with low failure rates and long expected service life.

Suitable for

• Short-range rack-to-rack or in-rack connections in data centers
• High-performance computing clusters requiring 40 Gbit/s links
• Switch-to-switch, switch-to-storage or switch-to-router connections supporting QSFP 40GBase-CR4
• Environments using Ethernet, FCoE, Fibre Channel or InfiniBand protocols

Key specifications

• Connector type: QSFP male to QSFP male
• Length: 0.5 m
• Maximum data rate: up to 40 Gbit/s
• Transmission medium: passive twinax copper (40GBase-CR4 electrical)
• Wire gauge: 30 AWG twinax
• Compliance: MSA-compliant mechanical and electrical characteristics

How to use

Install the cable by aligning each QSFP plug with the corresponding QSFP port on the devices and insert until it latches. Use the 0.5 m length for connections within the same rack or between adjacent racks where short, direct electrical links are appropriate. Verify that the connected hardware and firmware explicitly support passive QSFP 40GBase-CR4 direct attach cables before operation. Monitor link status via the host devices to ensure proper negotiation and error-free operation.

Recommendations

For best performance, route the cable to avoid sharp bends and mechanical stress; maintain bend radius guidelines for 30 AWG twinax. Ensure both endpoints support passive 40G QSFP DACs and that firmware is up to date. Consider testing a sample in your target hardware to confirm compatibility and link behavior before large deployments.