CBO QSFP Male-to-Male Cable F66V4-BL 0.5 m — 40 Gbit/s

Direct-attach CBO QSFP male-to-male cable F66V4-BL 0.5 m is a short, fixed-length high-speed interconnect designed to link QSFP ports at 40 Gbit/s. The 0.5 m cable provides a compact physical connection for switches, routers and servers where low latency and minimal signal loss are required. This cable is suitable for short-reach applications in data centers, network racks and aggregation points where a reliable copper or active direct attach solution is preferred over optical transceivers.

Advantages

This QSFP male-to-male cable delivers a consistent 40 Gbit/s throughput with reduced power consumption compared with discrete optical modules and transceivers. The short fixed length minimizes crosstalk and insertion loss while providing easy plug-and-play installation. Ruggedized connectors and a flexible jacket support tight cable management in dense rack environments, and the design reduces the need for additional transceiver inventory and fiber patching.

Suitable for

• Short-reach server-to-switch connections in data centers
• Switch-to-switch links within the same rack or adjacent racks
• High-throughput aggregation and top-of-rack networking
• Low-latency connections for storage and compute clusters

Key specifications

• Connector type: QSFP male-to-male
• Maximum data rate: 40 Gbit/s
• Cable length: 0.5 m (fixed)
• Transmission medium: direct-attach copper / active cable (short-reach)
• Typical use: short-reach interconnects between network devices

How to use

Insert each QSFP connector into the corresponding QSFP port on your switch, router or server until it latches. Ensure both ends are seated properly and that ports are powered and configured for 40 Gbit/s operation. Avoid excessive bending of the cable near the connector; maintain gentle radii in accordance with rack layout to prevent mechanical stress. If the cable is an active variant, verify compatibility with the host device firmware and enable any required auto-negotiation settings.

Recommendations

Use this short 0.5 m QSFP cable for intra-rack and adjacent-rack links where fixed-length, low-latency connections are needed. Keep spare cables of matching length for predictable signal behaviour and simplify inventory by standardizing on this cable type for similar short-reach links.