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

The BlueLAN QSFP28-4SFP28-DAC-2M is a passive 100GBASE-CR4 direct attach breakout cable that connects a single QSFP28 port to four SFP28 ports. Designed for short-reach, high-bandwidth links in data centers and high-performance computing environments, this 2 meter AWG26 cable supports aggregate 100 Gbps throughput using four independent 25 Gbps lanes. The cable’s factory-terminated QSFP28 and SFP28 connectors provide a compact, low-latency physical connection for switches, routers and server NICs that accept QSFP28 and SFP28 modules.

Advantages

The breakout cable delivers a cost-effective, low-power alternative to optical transceivers and fiber cabling for short-distance interconnects. Passive construction reduces power consumption and eliminates the need for separate transceivers, while the AWG26 conductor and industry-standard connector pinouts ensure reliable signal integrity at 25 Gbps per lane. Its 2 m length balances reach and cable management in rack and cabinet deployments, and the durable jacket and molded strain reliefs increase mechanical reliability during installation and reconfiguration.

Suitable for

• High-density switch-to-switch connections in top-of-rack and spine-leaf architectures
• Direct server-to-switch links where SFP28 ports are available
• Short-reach aggregation and breakout applications in data center racks
• Environments requiring low-latency, high-bandwidth interconnects

Key specifications

• Topology: QSFP28 to 4 × SFP28 breakout (100G to 4 × 25G)
• Standard: 100GBASE-CR4 / 25G electrical lanes
• Length: 2 meters
• Cable gauge: AWG26
• Connector types: QSFP28 (one end) and SFP28 (four ends)
• Construction: Passive copper Direct Attach Cable (DAC)
• Typical use: Short-reach, rack/cabinet interconnects

How to use

Plug the QSFP28 end into the 100G QSFP28 port on the source device and insert each SFP28 connector into the corresponding 25G ports on the destination device(s). Ensure that connectors are oriented correctly and fully seated until the latch engages. Power down or follow hot-plug guidelines of your equipment as required by the vendor before inserting or removing the cable. Verify link status and speed in the host devices to confirm successful negotiation of 25 Gbps lanes and 100 Gbps aggregate where applicable.

Usage recommendations

Use this passive breakout cable for short-distance connections within the same rack or adjacent racks. Avoid sharp bends and excessive pulling on the cable; maintain bend radii recommended for AWG26 copper cables. For runs beyond short-reach limits, consider active DACs or optical transceivers and fiber cabling. Confirm compatibility with your switch or server vendor’s supported breakout and DAC lists to ensure full functionality.