CBO QSFP to 4×SFP+ Breakout Cable MC2609130-005-BL, 40 Gbit/s, 5 m

The CBO QSFP to 4×SFP+ Breakout Cable MC2609130-005-BL is a passive copper assembly that converts a single QSFP port into four independent SFP+ ports, delivering an aggregate throughput of 40 Gbit/s over a 5 m length. Designed for use in data centers and network equipment interconnects, this 5 m breakout cable simplifies cabling by enabling direct port breakout or link aggregation between QSFP-enabled switches, servers and other networking devices while maintaining backward compatibility with SFP+ modules and ports.

Advantages

This passive breakout cable offers a straightforward, low-latency solution for converting QSFP interfaces to multiple SFP+ links without additional transceivers or power. The fixed 5 m length provides predictable signal performance suitable for rack-to-rack or within-rack connections. Its compact, factory-terminated design reduces installation time and physical connector bulk compared with separate modules and fiber or active copper assemblies. The cable supports full 40 Gbit/s aggregate bandwidth while allowing flexible use of individual 10 Gbit/s lanes.

Suitable for

• Link aggregation or port breakout in data center switches
• Connecting QSFP ports on aggregation switches to multiple SFP+ ports on servers or top-of-rack switches
• Rack-to-rack and within-rack copper interconnects up to 5 m
• Environments where low latency and direct copper connectivity are required

Key specifications

• Interface: QSFP (one end) to 4 × SFP+ (other end)
• Aggregate data rate: 40 Gbit/s
• Per-lane rate: 4 × 10 Gbit/s
• Cable type: Passive copper breakout assembly
• Length: 5 m
• Connector style: Factory-terminated QSFP and SFP+ plugs
• Typical use case: Short-reach data center interconnects

How to use

To deploy the breakout cable, power down equipment or follow hot-plug guidelines of your network devices. Insert the QSFP end into the QSFP port on the source device and plug the four SFP+ ends into the destination device ports. Ensure link settings, speed negotiation and any port breakout configuration on switches or servers are set according to the vendor documentation to enable four separate 10 Gbit/s channels or aggregated 40 Gbit/s operation. Verify link status LEDs and perform network tests to confirm throughput and stability.

Recommendations

Use the cable in temperature-controlled data center environments and avoid tight bends or mechanical stress near the connectors. When implementing port breakout, confirm switch firmware and port mapping to ensure lanes are assigned as expected. For longer distances or different media types, consider active copper or optical alternatives.