BlueOptics QSFP-4SFP10G-CU5M-HU-BL InfiniBand fibre optic cable 5m 4xSFP+ Male/Male

The BlueOptics QSFP-4SFP10G-CU5M-HU-BL is a 5 m direct attach cable (DAC) with a QSFP connector on one end and four SFP+ connectors on the other, designed for short-distance, high-speed interconnects in data centre racks and adjacent rack rows. The cable supports 40GBase-CR4 and 4x10GBase-CR electrical transmission and is built as a passive twinax copper assembly with 26 AWG conductors to provide low-latency, low-power connectivity between switches, routers, storage systems and other network hardware that accept QSFP-to-4xSFP+ DACs.

Advantages

This 5 m DAC offers native support for 40 Gbps aggregated links or four independent 10 Gbps lanes while consuming minimal power and introducing very low latency due to its passive twinax design. Manufactured according to MSA-compliant dimensions and using quality components, the cable is suitable for dense rack environments and provides a robust mechanical fit with male QSFP and SFP+ terminations. The cable is compatible with major platforms that accept QSFP-to-4xSFP+ passive DACs and is intended as a cost-effective alternative to active or optical transceivers for short-range connections.

Suitable for

• Connecting QSFP ports to multiple SFP+ ports within racks or between adjacent racks
• 40GBase-CR4 aggregate links and splitting into 4x10GBase-CR lanes
• High-density switch-to-switch or switch-to-server interconnects in data centres
• Fibre Channel over Ethernet (FCoE) and InfiniBand short-reach links where passive DACs are supported

Key specifications

• Length: 5 metres
• Connector types: 1x QSFP (male) to 4x SFP+ (male)
• Transmission modes supported: 40GBase-CR4 and 4x10GBase-CR electrical lanes
• Cable type: Passive twinax copper
• Conductor gauge: 26 AWG
• Power consumption: very low (passive, approx. 0.1 W typical for comparable passive DACs)
• Compliance: MSA-compatible mechanical and electrical specifications

How to use

Before installation, verify that both endpoints officially support passive QSFP-to-4xSFP+ DAC connections and that firmware or software settings do not block third-party DACs. Insert the QSFP plug into the QSFP port and the SFP+ plugs into the corresponding SFP+ ports until each latch clicks into place. Route the cable inside the rack to avoid sharp bends and mechanical strain; keep bend radius within the manufacturer’s recommendations. For channel splitting, ensure host interfaces and switch port configurations match the intended use (either aggregated 40G or four independent 10G lanes).

Recommendations

Use this passive 5 m QSFP-to-4xSFP+ DAC for short-reach connections only (typically within the same rack or adjacent racks). Do not use in environments where active signal conditioning is required. Regularly inspect connectors for dust and mechanical wear and avoid excessive cable bending or tension to maintain reliable performance over the cable’s service life.