Network Cable BlueLAN QSFP28-4SFP28-DAC-2M QSFP28 to 4x25GBASE-CR SFP28 100GBASE-CR4 2m Blue

The BlueLAN QSFP28-4SFP28-DAC-2M is a passive direct attach breakout cable engineered for high-speed short-reach interconnects. One end terminates in a QSFP28 connector and the other end splits into four SFP28 plugs, enabling a single 100G port to connect to four 25G ports. The 2 meter length and AWG26 conductor gauge provide a balance of flexibility and controlled impedance to support 100GBASE-CR4 and 4x25GBASE-CR links with low latency and minimal signal degradation.

Advantages

This cable offers straightforward, low-power connectivity without the need for external transceivers or optical modules. Its passive copper construction reduces complexity and power consumption compared with active or optical solutions while preserving signal integrity over short distances. The breakout design simplifies port aggregation and migration scenarios where a single high-speed interface must be distributed across multiple 25G endpoints.

Suitable for

• Data center top-of-rack and spine-switch interconnections
• High-performance computing cluster node links
• Switch-to-switch aggregation or port breakout deployments
• Short-reach server uplinks and appliance connections

Key specifications

• Connector type: QSFP28 (one end) to 4 × SFP28 (other end)
• Supported standards: 100GBASE-CR4; 4×25GBASE-CR
• Length: 2 meters
• Wire gauge: AWG26
• Cable type: Passive direct attach copper breakout
• Typical applications: Short-reach copper interconnects for racks and switches

How to use

Insert the QSFP28 connector into the 100G QSFP28 port and plug each SFP28 connector into the corresponding 25G SFP28 ports on the target devices. Ensure ports are powered down or follow hot-plug guidelines specified by the equipment manufacturer when connecting or disconnecting. Verify link status and speed settings on connected switches or servers and, if necessary, configure the host or switch interfaces for 25G operation or 100G breakout mode according to device documentation.

Usage recommendations

Use this passive breakout cable for short intra-rack or adjacent-rack connections up to 2 meters. Avoid tight bends and maintain recommended bend radius to prevent stress on the AWG26 conductors. For distances beyond 2 meters or where active signal conditioning is required, consider active copper or optical options. Confirm compatibility with your switch or server vendor's supported cable list to ensure proper recognition and full link speed.