Network Cable BlueLAN QSFP28-4SFP28-DAC-2M QSFP28 to 4x25GBASE-CR SFP28 Direct Attach Breakout Cable 2m Blue

The BlueLAN QSFP28-4SFP28-DAC-2M is a passive breakout direct-attach cable that links a single QSFP28 100G port to four independent SFP28 25G ports. At 2 meters length and AWG26 conductor gauge, this cable provides a low-latency physical connection suitable for short-reach interconnects inside racks and between adjacent switches or servers. It supports 100GBASE-CR4 electrical signaling on the QSFP28 side and four 25GBASE-CR SFP28 channels, enabling aggregation or breakout of high-speed lanes without active optics.

Advantages

This direct attach copper cable offers straightforward deployment with no additional transceivers or power required, reducing component count and operational complexity. The AWG26 construction and passive design deliver consistent signal integrity for short-distance links and help minimize latency. A 2 m length balances reach and manageability inside dense rack environments, and the QSFP28-to-4xSFP28 breakout format enables flexible port consolidation and architecture simplification.

Suitable for

• High-density rack interconnects between switches and top-of-rack devices
• Server to switch connections in short-reach data center topologies
• 25G lane breakout from a 100G QSFP28 port for aggregation or testing
• High-performance computing clusters requiring low-latency links

Key specifications

• Connector types: QSFP28 (one end) to 4 × SFP28 (other end)
• Supported standards: 100GBASE-CR4 on QSFP28 side, 25GBASE-CR on SFP28 channels
• Length: 2 meters
• Cable gauge: AWG26
• Passive direct-attach copper (DAC) construction
• Breakout configuration: 1× QSFP28 to 4× SFP28

How to use

Unpack the cable and inspect both connector ends for damage or debris before installation. Align the QSFP28 connector with the 100G port and insert until it seats; route the cable to avoid tight bends and secure it to prevent strain. Plug each SFP28 connector into the corresponding 25G ports on the target devices. After physical connection, verify link status and channel negotiation on connected devices; no external power or transceiver modules are required for this passive breakout cable.

Usage recommendations

For reliable performance, use this passive DAC for short-reach connections within the same rack or adjacent racks. Avoid routing the cable near sources of electromagnetic interference and maintain bend radii consistent with manufacturer guidance. Confirm that the host ports support passive QSFP28-to-SFP28 breakout operation and compatible speed settings before deployment.