DAC cable CBO JNP-QSFP-DAC-0.5M-BL 0.5 m QSFP Male-to-Male 40 Gbit/s

Direct Attach Copper (DAC) cable CBO JNP-QSFP-DAC-0.5M-BL is a 0.5 m passive QSFP Male-to-Male assembly designed for 40 Gbit/s connections. The cable delivers a short-reach, high-bandwidth link between network devices equipped with QSFP ports and is suited for dense rack and data center environments where low latency and power efficiency are required.

Advantages

The passive copper construction provides low latency and reduced power consumption compared with optical transceivers. Its 0.5 m length minimises signal loss for short interconnect runs while keeping cable management simple. The QSFP male-to-male connectors offer plug-and-play compatibility with QSFP ports, enabling quick installation without additional modules or configuration. The cable is suitable for high-throughput traffic and keeps thermal load low in constrained rack spaces.

Suitable for

• Interconnects between switches in the same rack
• Connections between routers and aggregation switches
• Server uplinks to top-of-rack switches
• High-density data centre patching and short-distance links

Key specifications

• Connector type: QSFP male-to-male
• Data rate: up to 40 Gbit/s
• Cable type: passive direct attach copper (DAC)
• Length: 0.5 m
• Form factor: QSFP interface for four-lane aggregation
• Typical use: short-reach, high-bandwidth interconnect

How to use

Install the cable by inserting each QSFP connector into the corresponding QSFP port on the devices until the connector latches. Ensure both devices are powered and that ports support 40 Gbit/s QSFP passive copper assemblies. No additional modules or transceivers are required. Verify link status through device management interfaces and monitor traffic to confirm expected throughput.

Recommendations

For reliable operation, avoid sharp bends and excessive tension on the cable; maintain minimum bend radius as recommended for copper assemblies. Use this 0.5 m DAC cable for intra-rack and short inter-rack connections where cable length limits are met. In environments requiring longer runs or optical isolation, consider appropriate active or optical alternatives.