Cisco QDD-400-CU0-5M AddOn Networks 400G DAC 50 cm | QSFP-DD — QDD-400-CU0-5M-AO

Keep high-speed links close to the hardware with a 50 cm passive DAC designed for 400G short-reach connectivity. This AddOn Networks compatible cable is a practical fit for dense racks, top-of-rack switching, and adjacent device interconnects where the goal is simple: move traffic without adding transceiver overhead, extra power draw, or unnecessary optical components. For infrastructure teams, the value is in the details. A passive copper assembly reduces link complexity while preserving the direct, deterministic behavior expected in tightly controlled data center layouts. It is well suited for environments where ports are already committed, cable runs are short, and every added component has a cost in budget, heat, or troubleshooting time. This cable is a strong choice when you need a clean 400G path between compatible Cisco-class interfaces and want to keep the deployment compact. It supports the kind of short-distance connectivity that makes sense in modern leaf-spine and rack-scale designs, especially where port density and cable management matter as much as throughput. Ideal For Connect adjacent top-of-rack switches in a 400G leaf-spine fabric Link servers to switches within the same rack using short copper runs Patch high-density network appliances where optical modules are unnecessary Support low-latency intra-rack interconnects in enterprise data centers Why This Product 1 Shorter 50 cm reach for same-rack deployments 2 Passive copper design avoids optical module overhead 3 QSFP-DD compatibility for 400G infrastructure 4 Better fit for dense rack cable management than longer assemblies