Network Cable BlueOptics FN-CABLE-QSFP28-4SFP28-3 QSFP28 DAC 3m Black

The BlueOptics FN-CABLE-QSFP28-4SFP28-3 QSFP28 DAC 3m Black is a 3-meter direct attach copper (DAC) cable designed for short-reach, high-speed connections in data centers and enterprise networks. Engineered to support QSFP28 to 4x SFP28 connectivity, this passive cable provides a compact, low-latency link between QSFP28 ports and multiple SFP28 ports, enabling 100Gbps to 4x25Gbps aggregation or breakout configurations. The robust construction and shielding ensure stable signal integrity and mechanical durability for rack-to-rack and switch-to-server links.

Advantages

The cable offers reliable high-bandwidth performance with minimal latency, suitable for 100Gbps QSFP28 interfaces and breakout to 4 x 25Gbps SFP28 channels. Its passive DAC design reduces power consumption compared with active optical solutions and provides low insertion loss for short-distance interconnects. Built with reinforced connectors and a flexible outer jacket, it is durable for frequent handling and rack installation while maintaining consistent electrical characteristics.

Suitable for

• Short-reach connections between switches and top-of-rack equipment
• Breakout configurations from 100Gbps QSFP28 ports to 4 x 25Gbps SFP28 ports
• High-density data center cabling and server interconnects
• Environments requiring low-latency, high-throughput links

Key specifications

• Connector type: QSFP28 to 4 × SFP28 (DAC breakout cable)
• Length: 3 meters
• Supported data rates: 100Gbps (QSFP28) and 4 × 25Gbps (SFP28)
• Cable medium: direct attach copper (passive DAC)
• Typical applications: short-reach aggregation, server and switch interconnects
• Construction: shielded assembly with reinforced connectors and flexible jacket

How to use

Connect the QSFP28 end to the 100Gbps QSFP28 port on a switch or aggregation device, and plug the four SFP28 ends into the corresponding SFP28 ports on target switches or servers according to the intended breakout mapping. Ensure devices are powered down or ports are in a safe state per your equipment guidelines before insertion if required by the hardware vendor. After connection, verify link status and negotiate speeds on both ends using network management tools or device consoles.

Usage recommendations

Use this DAC cable for short-distance links within a rack or between adjacent racks—typically up to a few meters—to maintain signal integrity and low latency. Avoid sharp bends and excessive pulling force during installation; follow vendor-specified bend radius and handling practices. For longer reaches or environments requiring electrical isolation, consider optical transceivers and fiber cabling as alternatives.