CBO QSFP to 4×SFP Breakout Cable 40 Gbit/s, model 40G-QSFP-4SFP-PC-0501-BL, 5 m

Breakout cable CBO QSFP to 4×SFP 40 Gbit/s, model 40G-QSFP-4SFP-PC-0501-BL, 5 m, is a passive direct-attach copper assembly that splits a single 40 Gbit/s QSFP interface into four independent SFP links. The cable is intended for short-reach electrical connections between network devices and enables consolidation of ports, test access and simplified wiring in confined rack environments. It supports direct electrical breakout without additional transceivers, suitable for use in switches, routers and servers where high-density aggregation is required.

Advantages

The BlueOptics passive breakout cable offers a compact, low-latency solution for converting a 40 Gbit/s QSFP port into four SFP channels, reducing the need for separate transceivers and minimizing installation complexity. Its fixed 5 m length provides predictable signal behavior for short-reach copper topologies and helps maintain tidy cable management in data centre racks. As a passive copper assembly, it requires no external power or configuration and delivers a cost-effective connection method for port consolidation and test scenarios.

Suitable for

• Data centre uplinks and spine-to-leaf aggregation where short-range copper connections are acceptable
• Consolidating multiple SFP ports from a single QSFP port on switches and routers
• Lab testing and validation of multi-port configurations without separate transceivers
• Interconnects between servers and top-of-rack switches in high-density racks

Key specifications

• Interface: QSFP (one end) to 4 × SFP (other end)
• Aggregate data rate: 40 Gbit/s (split into four 10 Gbit/s channels)
• Cable type: Passive copper direct-attach assembly
• Length: 5 m
• Application: Short-reach electrical breakout for aggregation and testing
• Compatibility: Designed for devices supporting QSFP-to-SFP direct breakout

How to use

Plug the QSFP end into the 40 Gbit/s QSFP port on the source device and insert each SFP connector into the corresponding 10 Gbit/s SFP ports on the destination device. Ensure that equipment ports support direct electrical breakout and that firmware or port mapping settings on switches and routers are configured if required. Route the cable to avoid sharp bends and mechanical strain; secure with rack cable management to maintain airflow and prevent connector stress during operation.

Recommendations

Use this passive breakout cable for short-distance connections within racks or between adjacent racks. Verify that both endpoints support passive QSFP-to-4×SFP breakout and check switch documentation for any required port mapping or configuration steps. Avoid using beyond its intended short-reach range and inspect connectors for damage before installation to ensure reliable links.