BlueOptics QNAP CAB-DAC2M-Q28B4 BlueLAN Passive 100GBASE-CR4 QSFP28 to 4x25GBASE-CR SFP28 Direct Attach Breakout Cable, 2m

The BlueOptics QNAP CAB-DAC2M-Q28B4 BlueLAN is a high-performance passive Direct Attach Copper (DAC) breakout cable designed for data centers and enterprise networks. It connects a QSFP28 port to four SFP28 ports, enabling 100 Gbps to 4x25 Gbps breakout connectivity. This cable is fully compatible with QNAP and other standard-compliant equipment, offering reliable, low-latency transmission.

Advantages

Cost-effective and energy-efficient passive copper design with near-zero power consumption. Hot-pluggable for easy installation and maintenance. Supports high-density cabling with breakout capability, reducing port count and simplifying network architecture.

Suitable for

• Data center top-of-rack to server/storage connections
• High-performance computing (HPC) clusters
• Enterprise network aggregation and core links
• QNAP NAS and switch deployments requiring 25G/100G connectivity

Key specifications

• Cable Type: Direct Attach Copper (DAC) Breakout Cable
• Connector A: QSFP28
• Connector B: 4x SFP28
• Aggregate Data Rate: 100 Gbps
• Per Lane Data Rate: 4x 25 Gbps
• Cable Technology: Passive Copper
• Length: 2 meters (6.56 ft)
• Ethernet Standard (QSFP28): 100GBASE-CR4 (IEEE 802.3bj)
• Ethernet Standard (SFP28): 25GBASE-CR (IEEE 802.3by)
• Impedance: 100 Ohm
• Operating Temperature: 0°C to 70°C
• Hot-Pluggable: Yes
• RoHS Compliant: Yes

Recommendations

For optimal performance, ensure both ends are inserted into compatible QSFP28 and SFP28 ports. This cable is ideal for short-reach breakout applications within racks or adjacent racks.