BlueOptics QNAP CAB-DAC3M-Q28B4 BlueLAN Passive 100GBASE-CR4 QSFP28 to 4x25GBASE-CR SFP28 Direct Attach Breakout Cable, 3m

The BlueOptics QNAP CAB-DAC3M-Q28B4 BlueLAN is a high-performance passive direct attach breakout cable designed for 100 Gigabit Ethernet connectivity. It converts a single QSFP28 port into four independent SFP28 ports, enabling cost-effective 100G to 4x25G breakout applications in data centers, enterprise networks, and high-performance computing environments.

Advantages

This breakout cable offers a reliable and low-latency solution for connecting QSFP28 switches to SFP28 servers or storage devices. Its passive twinax design ensures minimal power consumption (<0.5W) and hot-pluggable convenience. The 3-meter length provides flexibility in rack cabling while maintaining signal integrity.

Suitable for

• Data center top-of-rack to server connections
• High-performance computing clusters
• Enterprise network aggregation
• QNAP NAS and switch deployments

Key specifications

• Cable Type: Direct Attach Cable (DAC) Breakout
• Aggregated Data Rate: 100 Gbps (4x25 Gbps per lane)
• Connectors: 1x QSFP28 to 4x SFP28
• Length: 3 meters (9.84 ft)
• Technology: Passive Twinax
• Standards: IEEE 802.3bj 100GBASE-CR4, IEEE 802.3by 25GBASE-CR
• Impedance: 100 Ohm
• Power Consumption: <0.5W typical
• Operating Temperature: 0°C to 70°C
• RoHS Compliant: Yes

Recommendations

For optimal performance, ensure both host devices support QSFP28 and SFP28 interfaces respectively. This cable is compatible with QNAP and other standards-compliant networking equipment. Verify port breakout capability on the QSFP28 switch before deployment.