DAC cable CBO EX-QSFP-40GE-DAC-50CM 0.5m QSFP-to-QSFP passive direct-attach cable, black

CBO EX-QSFP-40GE-DAC-50CM is a 0.5 m passive direct-attach copper (DAC) cable with QSFP connectors on both ends, intended for short-range 40GbE interconnects. The cable offers a factory-terminated, plug-and-play connection that eliminates the need for separate transceivers, providing a low-latency link between QSFP ports in switches, routers and servers. Its compact length and robust black jacket make it suitable for dense data center top-of-rack and cross-connect installations where reliable, short-distance high-speed connectivity is required.

Advantages

The passive DAC design provides a cost-effective, energy-efficient solution for 40 Gb Ethernet connections without the need for optical modules. With QSFP-to-QSFP terminations, the cable delivers low latency and minimal signal loss for short runs. Being factory-terminated and plug-and-play reduces installation time and the risk of connector errors. The 0.5 m length is optimized for close-proximity port pairs, helping to maintain tidy cable management in high-density racks.

Suitable for

• Top-of-rack switch-to-switch connections in data centers
• Server-to-switch or server-to-server high-speed links within the same rack
• Short-distance cross-connects in racks and patch panels
• Environments requiring low-latency 40GbE interconnects

Key specifications

• Connector type: QSFP to QSFP
• Length: 0.5 m (50 cm)
• Media: Passive copper direct-attach
• Supported data rate: 40 Gigabit Ethernet
• Installation: Factory-terminated, plug-and-play
• Colour: Black

How to use

Ensure both QSFP ports support passive DAC connections and are powered off or in a safe state before insertion. Align each QSFP connector with the port and insert until the latch engages; avoid twisting or excessive force. After connection, power on the devices and verify link status through the network equipment management interface or LEDs. For removal, depress the latch and pull the connector straight out to prevent damage to the port or cable.

Recommendations

Use this 0.5 m DAC cable for short, direct links where 40GbE performance is required and space is limited. Maintain bend radius guidelines, avoid tight kinks, and keep the cable away from sources of mechanical stress or sharp edges. For longer distances or active signal conditioning, consider optical transceivers or active DAC alternatives.