BlueOptics 40G-QSFP-4SFP-C-1M-BL InfiniBand fibre optic cable 1m QSFP 4xSFP+

The BlueOptics 40G-QSFP-4SFP-C-1M-BL is a 1-meter direct attach cable with a QSFP connector on one end and four SFP+ connectors on the other, designed for short-range, high-speed interconnects in rack and adjacent-rack environments. This passive twinax copper assembly supports 40GBase-CR4 and 4x10GBase-CR electrical transmission and is MSA-compliant, providing a compact and reliable connection for switches, routers and storage systems that accept QSFP-to-4xSFP+ breakout cables.

Advantages

The cable offers low latency and low power consumption typical of passive twinax designs, with a compact 1 m length suitable for top-of-rack and adjacent-rack links. MSA-compliant construction and the use of high-quality components ensure interoperability with major hardware platforms and a long service life when used within specified short-reach applications. As a direct attach solution, it provides cost-effective connectivity without active optical transceivers.

Suitable for

• Top-of-rack and adjacent-rack interconnects in data centers
• Connecting QSFP ports to four SFP+ ports for 40G-to-4x10G breakout configurations
• High-speed Ethernet, FCoE and InfiniBand links up to 40 Gbit/s over short distances
• Switch-to-switch, switch-to-storage and switch-to-server links that support passive DACs

Key specifications

• Cable type: Passive twinax copper Direct Attach Cable (DAC)
• Length: 1 meter
• Connector configuration: QSFP (one end) to 4 × SFP+ (other end)
• Supported protocols: 40GBase-CR4 and 4×10GBase-CR electrical transmission
• Wire gauge: 30 AWG
• Compliance: MSA-compliant design for interoperability
• Typical applications: Ethernet, FCoE and InfiniBand short-range links

How to use

Install the cable by firmly inserting the QSFP end into a compatible QSFP port and the four SFP+ ends into the corresponding SFP+ ports on the target device, ensuring correct orientation and full seating of each connector. Confirm that the connected hardware platform officially supports passive QSFP-to-4xSFP+ breakout DACs and that firmware or software settings permit passive DAC operation. Avoid sharp bends and excessive mechanical stress on the cable; maintain appropriate bend radius and secure routing within the rack to prevent strain on connectors.

Recommendations

Use this 1 m passive DAC for short-distance links inside racks or between adjacent racks where low latency and low power consumption are required. Verify compatibility with your switch or server vendor documentation before deployment, and perform a link test after installation to confirm full functionality.