Cisco QSFP-4SFP10G-CU3M= 3 m Passive Splitter Cable | 40 Gb/s — QSFP-4SFP10G-CU3M=

Expand port flexibility without adding active electronics. The Cisco QSFP-4SFP10G-CU3M= is a 3 m passive copper splitter cable that converts one QSFP+ interface into four SFP+ connections, making it a practical fit for high-density switching environments and short-reach interconnects. At 40 Gb/s, this cable is built for controlled breakout scenarios where a single uplink must serve multiple downstream devices. The passive design keeps the path simple, which is useful when you want predictable cabling, lower complexity, and fewer points of failure than an active conversion solution. For infrastructure teams, the value is in the deployment model: one port, four endpoints, and a cable length that works well inside racks or between nearby enclosures. It is a strong choice when you need to extend port utility without changing the architecture of the network fabric. Ideal For Break out a 40 Gb/s uplink to four 10 Gb/s devices Connect switches in adjacent racks with short passive cabling Support high-density network aggregation in enterprise closets Fan out QSFP+ ports for controlled breakout deployments Why This Product 1 Passive breakout avoids active conversion hardware 2 QSFP+ to 4 x SFP+ design increases port density from a single uplink 3 3 m reach fits rack-local deployments better than longer breakout cables 4 40 Gb/s support aligns with high-speed aggregation use cases