Cisco QSFP-H40G-CU1M= 40GBASE-CR4 Passive Copper Cable, 1 m | QSFP+ DAC

Build short-reach 40 GbE links with a cable designed for dense infrastructure. Cisco’s 1 meter passive copper DAC is a practical choice for connecting nearby switches, servers, and storage systems when the devices sit within the same rack or in tightly grouped cabinets. Passive copper direct attach cabling removes the need for separate transceivers, which helps simplify procurement, reduce power draw, and keep deployment steps to a minimum. The 1 meter length is especially useful in top-of-rack environments where excess cable can obstruct airflow or create unnecessary slack. For teams standardizing on QSFP+ connectivity, this cable provides a straightforward path to 40GBASE-CR4 short-reach links. Compared with longer optical alternatives, this cable is built for the jobs that do not need distance — only dependable throughput, clean routing, and fast installation. It fits well in environments where every rack unit and every minute of maintenance time matters. When the requirement is short, direct 40 GbE connectivity, this cable delivers the right balance of simplicity and performance.