InfiniBand/fibre optic cable BlueOptics SFPPQSFP30-01-BL 1 m 4xSFP+ QSFP

The BlueOptics SFPPQSFP30-01-BL is a 1 m InfiniBand/fibre optic direct attach cable with a QSFP to 4×SFP+ breakout. Engineered for short-reach, high-speed interconnects in racks and adjacent rack pairs, this cable supports 40GBase-CR4 and 4×10GBASE-CR electrical transmission over a 30 AWG twinax conductor. The passive design provides low power consumption and low latency while enabling reliable connectivity between switches, routers, storage systems and other network devices that accept QSFP-to-SFP+ direct attach links.

Advantages

This cable delivers multi-protocol support for Ethernet, Fibre Channel, FCoE and InfiniBand up to 40 Gbps on a 1 m link while complying with MSA mechanical and electrical specifications. The QSFP-to-4×SFP+ configuration offers flexible port consolidation and simple deployment in Top-of-Rack and adjacent-rack scenarios. Built from quality twinax conductors and industry-standard components, the unit is a plug-and-play passive DAC that reduces power draw and latency compared with active copper or optical transceivers for short distances.

Suitable for

• Top-of-Rack and adjacent-rack high-density switch interconnects
• Server-to-switch or switch-to-switch aggregation at 40 G or 4×10 G
• Storage system links and SAN connectivity using Fibre Channel or FCoE
• InfiniBand connections within compute clusters

Key specifications

• Length: 1 metre
• Connector type: QSFP to 4×SFP+
• Data rates supported: up to 40 Gbps (40GBase-CR4 / 4×10GBASE-CR)
• Cable type: passive twinax copper, 30 AWG
• Power consumption: passive (approx. 0.1 W typical system-level impact)
• Compliance: MSA-compatible electrical and mechanical form factors

How to use

Insert the QSFP end into a QSFP-capable port and the four SFP+ ends into the respective SFP+ ports of the target device, ensuring both devices support passive QSFP-to-4×SFP+ direct attach cables and the selected transmission protocol. Verify link speed and lane mapping in the host device firmware or switch OS, and confirm LEDs or management interfaces report an active link. No additional configuration is required on most platforms beyond port speed and protocol settings; handle the cable by its connectors and avoid sharp bends or excessive pulling on the cable assembly.

Recommendations

For reliable operation, use the cable within recommended rack-to-rack distances (short-reach applications) and ensure connected hardware officially supports passive QSFP-to-4×SFP+ direct attach twinax cables. Avoid tight bend radii, keep the cable away from heat sources, and follow the switch or server vendor’s guidance on passive DAC compatibility and firmware requirements to ensure full functionality.