H40G QSFP+ DAC Cables

A QSFP+ Direct Attach Copper (DAC) cable is a high-speed cable assembly with QSFP+ connectors on both ends. It's used for short-distance 40G connections, typically within a data center rack or between adjacent racks. It's a lower-cost, lower-power alternative to optical transceivers for these applications.

Use a passive DAC cable for 40G connections under 7 meters. They are ideal for linking servers to top-of-rack switches or for interconnecting switches within the same rack. They offer significant cost and power savings over optical transceivers and active optical cables (AOCs) for these short-reach scenarios.

Yes, when sourced from a reputable supplier. Our H40G QSFP+ DAC cables undergo a rigorous 5-step quality assurance and testing process to ensure they meet strict performance and reliability standards. We back our products with a comprehensive warranty for your peace of mind, ensuring dependable operation.

The maximum length for a 40G QSFP+ passive copper DAC is typically around 7 meters. Beyond this distance, signal integrity can degrade. For longer connections, an active DAC, an active optical cable (AOC), or optical transceivers with fiber optic cabling would be required to maintain a reliable link.

Our inventory includes DAC cables designed for specific brands like Cisco. Compatibility with other manufacturers' equipment depends on the specific device's requirements for coded transceivers. Please provide the model numbers of your equipment, and our technical team can confirm compatibility for you.

All our refurbished networking hardware, including H40G QSFP+ DAC cables, is backed by a rock-solid Terabit Systems warranty. We offer a 1-year replacement or full refund guarantee if you encounter any issues with the equipment, ensuring a simple, stress-free purchasing experience and reliable performance.