DAC cable CBO QTAPCABLE-0.5M QSFP direct attach copper 0.5 m

CBO QTAPCABLE-0.5M is a 0.5 m QSFP direct attach copper (DAC) cable designed for short-range high-speed interconnects between network devices equipped with QSFP ports. The fixed-length passive copper assembly provides a low-latency, energy-efficient connection for rack-to-rack or intra-rack links, enabling cost-effective connectivity without the need for separate optical transceivers. The cable is intended for use in environments where reliable, high-throughput connections are required between switches, routers and servers.

Advantages

The QSFP direct attach copper design delivers low latency and stable signal integrity over short distances, with reduced power consumption compared to active optical solutions. A 0.5 m fixed length simplifies cable management in densely populated racks and minimizes signal attenuation typical of longer copper links. Passive copper construction eliminates the need for separate transceiver modules, helping to lower total equipment cost while maintaining high data throughput and reliable connections.

Suitable for

• Short-range 40G/100G (or compatible QSFP speeds) connections between switches in the same rack
• Direct server-to-switch links in data center racks
• High-density network deployments requiring compact cable routing
• Environments where reduced power consumption and cost per link are priorities

Key specifications

• Connector type: QSFP to QSFP direct attach copper
• Length: 0.5 m (fixed)
• Cable type: Passive copper assembly
• Application: Short-reach high-speed interconnects for switches, routers and servers
• Latency: Low-latency physical link suitable for high-throughput traffic
• Power: Passive operation with no additional power draw for transceivers

How to use

Insert each QSFP connector into the corresponding QSFP port on the network devices until the connector latches. Ensure both ports are compatible with QSFP direct attach copper cables and that devices are powered off or restarted according to the vendor's hot-plug guidance if required. After physical insertion, verify link status in the device management interface and confirm negotiated speed and operation. Use appropriate bend radius practices and secure the cable to avoid mechanical strain on ports.

Recommendations

For optimal performance, use the cable for short intra-rack or adjacent-rack connections and avoid routing through tight bends or cable bundles that exceed recommended bend radius. Verify device compatibility with QSFP passive DAC assemblies and consult switch or server documentation for any firmware or configuration requirements related to direct attach copper links.