BlueOptics 40G-QSFP-4SFP-C-3M-BL InfiniBand fibre optic cable 4xSFP+ 3m

The BlueOptics 40G-QSFP-4SFP-C-3M-BL InfiniBand fibre optic cable 4xSFP+ 3m is a 3-meter direct attach solution with a QSFP connector on one end and four SFP+ connectors on the other. Designed for short-reach high-speed interconnects, this cable supports aggregation of four 10 Gbit/s lanes into a single 40 Gbit/s link and is suitable for use in data center racks and adjacent rack connections. The product follows MSA-compliant electrical twinax characteristics for reliable signal transmission where InfiniBand, Ethernet, FCoE or Fibre Channel protocols are implemented on compatible hardware platforms.

Advantages

This cable provides a compact, low-latency connection solution for short-distance links with a consolidated 40G to 4x10G split. As a passive direct attach cable it has reduced power consumption and simple design that minimizes failure points. The 30 AWG twinax construction and quality components ensure consistent electrical performance across the 3 m length and support wide interoperability with major vendors’ switches, routers and storage systems that accept QSFP-to-4xSFP+ direct attach connections.

Suitable for

• High-speed server-to-switch or switch-to-switch links within racks and between adjacent racks
• InfiniBand clusters and SAN interconnects using aggregated 40G lanes
• Short-reach 40GBase-CR4 and 4x10GBASE-CR applications for data centers and enterprise environments

Key specifications

• Cable type: passive direct attach twinax copper (electrical DAC)
• Connectors: 1×QSFP to 4×SFP+
• Data rate: up to 40 Gbit/s aggregated (4×10 Gbit/s lanes)
• Length: 3 meters
• Wire gauge: 30 AWG
• Standards: MSA-compliant QSFP and SFP+ electrical interfaces

How to use

Connect the QSFP end to a compatible QSFP port and the four SFP+ ends to the corresponding SFP+ ports on the target device. Ensure both devices support passive DAC twinax connections and the intended protocol (InfiniBand, Ethernet, FCoE, or Fibre Channel). Install the cable in rack environments following standard cable routing practices to avoid sharp bends and mechanical stress. No external power or configuration is required for the passive cable itself; any required link settings or protocol configuration must be performed on the connected network devices.

Recommendations

Verify hardware compatibility with the device vendor documentation before installation, keep bend radius above the manufacturer’s minimum, and avoid routing the cable near high-EMI sources. For best results in mission-critical systems, test links after installation and consider sampling one cable in your environment to confirm interoperability with your hardware and firmware versions.