Cisco - QSFP-4SFP10G-CU50CM Cabo breakout passivo de cobre Direct Attach (DAC) compatível 40G QSFP+ para 4 x 10G SFP+, 0,5 m

In high-density data centers, linking a 40G QSFP+ port to four separate 10G SFP+ devices often means wrestling with multiple cables and extra transceivers. This FS.COM breakout DAC eliminates that complexity with a single, integrated copper assembly. Plug the QSFP+ end into your switch or network card, and the four SFP+ legs fan out to servers, storage, or top-of-rack switches—no optical modules, no separate patch cords, just clean, low-latency connectivity in a 0.5-meter reach.

Key specifications

• Connector A: QSFP+ male
• Connector B: 4x SFP+ male
• Aggregate data rate: 40 Gbps (4x 10 Gbps lanes)
• Cable type: Passive copper direct attach cable (DAC)
• Length: 0.5 m (50 cm)
• Compatibility: Cisco (MSA compliant)
• Hot swappable: Yes
• Power consumption: Passive (ultra-low)
• Standards: MSA, RoHS

Why choose it

Passive copper DACs draw almost no power compared to active optical cables, reducing both energy costs and heat output in dense racks. The breakout design replaces up to five separate components—one QSFP+ transceiver, four SFP+ transceivers, and four patch cables—with a single, reliable cable. This simplifies inventory, speeds up deployment, and lowers the chance of connection errors. The 0.5-meter length is ideal for same-rack or adjacent-rack links, keeping signal integrity high and cable clutter minimal.

Ideal use cases

• Connecting a 40G QSFP+ switch port to four 10G SFP+ servers or storage nodes in a single rack.
• High-performance computing clusters where low latency and power efficiency are critical.
• Enterprise data centers upgrading from 10G to 40G aggregation without replacing existing 10G equipment.
• Lab or test environments needing a quick, reliable multi-device link.

Good to know

This cable is MSA compliant, meaning it works with any switch or NIC that follows the QSFP+ and SFP+ multi-source agreements, not just Cisco. Passive copper is best for short distances—up to 5 meters for 40G—so the 0.5-meter version is perfect for tight rack layouts. Each end is hot-swappable, so you can plug or unplug without powering down the connected devices. The cable is RoHS compliant and built with high-quality copper conductors for consistent performance.