Cisco QSFP-H40G-CU3M= 40GBASE-CR4 Passive Copper Cable, 3 m | QSFP+ — QSFP-H40G-CU3M=

Keep short-reach 40 GbE connections direct and manageable with the Cisco QSFP-H40G-CU3M= passive copper cable. Designed for QSFP+ connectivity, this 3 m assembly is a strong fit for rack-level interconnects where you want high bandwidth without the complexity of optical transceivers. Passive copper is often the preferred option for tightly controlled distances because it reduces component count and simplifies deployment. In dense environments, that translates to fewer parts to stock, fewer points of failure, and cleaner cable management. The 3 m length gives enough flexibility for adjacent equipment while staying short enough to preserve order in high-density racks. For teams building 40 GbE infrastructure, this cable is a straightforward way to connect switches, servers, and other network devices that support QSFP+ direct attach. It is especially useful where consistent short-run performance matters more than long-distance reach. If your architecture calls for reliable copper interconnects at 40 GbE, this model fits the job with minimal overhead and clear operational value. Ideal For Connect QSFP+ switches in a 40 GbE top-of-rack design Link servers and storage systems within the same rack Standardize short copper runs in high-density data centers Replace optical modules where 3 m direct attach is sufficient Why This Product 1 Passive copper is ideal for short 40 GbE runs 2 QSFP+ to QSFP+ design supports direct attach connectivity 3 3 m length fits adjacent rack equipment 4 Cisco part number simplifies procurement and standardization