CBO QSFP DAC cable 5 m for QSFP to 4× SFP+ direct-attach

The CBO QSFP DAC cable 5 m for QSFP to 4× SFP+ direct-attach is a passive copper breakout cable by BlueOptics designed for short-reach, high-speed interconnects. This 5-meter cable provides a QSFP connector on one end and four SFP+ connectors on the other, enabling a single QSFP port to be split into four SFP+ links without separate optical transceivers. It supports plug-and-play installation to simplify connectivity between switches, routers and servers while reducing rack complexity and operational cost.

Advantages

This direct-attach cable eliminates the need for individual transceivers, lowering initial hardware costs and power consumption compared with active or optical solutions. The passive copper construction offers low latency and reliable electrical performance for short distances, with a standardized form factor that ensures compatibility with common QSFP-to-SFP+ breakout applications. Installation is straightforward and requires no additional configuration.

Suitable for

• Breaking out a QSFP port into four SFP+ ports in data center switches
• Short-reach server to switch or router interconnects
• Top-of-rack and end-of-row aggregation links within racks
• High-density rack deployments where reducing transceiver count is desired

Key specifications

• Cable type: Passive direct-attach copper (DAC)
• Length: 5 meters
• Connector A: QSFP plug
• Connector B: 4 × SFP+ plugs (breakout)
• Data rates: Suitable for QSFP-to-SFP+ breakout at standard 10 Gbit/s per SFP+ lane (aggregate depends on host support)
• Application: Short-reach copper interconnect for switches, routers and servers

How to use

Power off or follow hot-swap procedures recommended by your equipment vendor, then insert the QSFP end into the QSFP port of the switch, router or host. Connect the four SFP+ plugs to the corresponding SFP+ ports on the target devices. The cable is passive and typically recognized automatically by network equipment that supports QSFP breakout functionality; verify port configuration and link aggregation settings in the device management interface if required. Avoid excessive bending and maintain recommended bend radius to preserve signal integrity.

Recommendations

Use this cable for in-rack or adjacent-rack connections up to 5 m where low latency and cost-effective breakout are priorities. Confirm compatibility with your equipment vendor’s QSFP breakout support and follow their guidance on port mapping and cable handling to ensure optimal operation.