CBO DAC cable QSFP28 SC282801L3M26 3 m — Direct attach copper, QSFP28 to QSFP28, 3-meter

The CBO DAC cable QSFP28 SC282801L3M26 3 m is a 3‑meter direct attach copper cable with QSFP28 connectors at both ends, designed for short-range 100GbE interconnections in data center environments. It creates a low-latency, energy-efficient physical link between compatible QSFP28 ports on switches, routers, and servers, and is intended for rack-to-rack and top-of-rack deployments where high throughput and simple cabling are required.

Advantages

This direct attach copper cable delivers native 100 Gigabit Ethernet throughput with minimal latency and reduced power consumption compared with active optical modules for short distances. The QSFP28 form factor ensures straightforward compatibility with QSFP28 ports, and the fixed-length design eliminates the need for transceivers and additional patching hardware, simplifying installation and lowering total cost of ownership. Its copper construction provides stable signal integrity for the specified short-range applications.

Suitable for

• Short-range 100GbE links between top-of-rack switches and aggregation switches
• Direct connections between servers and switches in the same rack or adjacent racks
• High-density data center environments requiring low-latency connectivity
• Temporary or permanent interconnects where simple, plug-and-play cabling is preferred

Key specifications

• Connector type: QSFP28 to QSFP28
• Cable type: Direct attach copper (DAC)
• Length: 3 meters
• Data rate: Supports 100 Gigabit Ethernet links
• Latency: Low-latency physical connection suitable for high-throughput applications
• Application: Short-range rack-to-rack and top-of-rack interconnects

How to use

Plug one QSFP28 connector into a compatible QSFP28 port on the network switch or router and the other connector into the corresponding QSFP28 port on the target device or server. Ensure both devices are powered down or follow hot‑swap guidance from the device vendor if the system supports hot insertion. Verify link status and interface configuration in the device management console and adjust port settings as required for 100GbE operation. Route the cable to avoid sharp bends and secure it within the rack to maintain signal integrity and airflow.

Recommendations

Use this direct attach copper cable for distances within rack or adjacent racks as specified; avoid using DAC cables beyond the recommended short-range limits. Confirm QSFP28 port compatibility with the device vendor and follow vendor guidelines for hot-plugging and supported link speeds. For longer distances or fiber-based infrastructure, consider using optical transceivers and fiber cabling instead.