Direct Attach QSFP28 Cable BlueOptics CAB-Q-Q-100GbE-3M-BL, QSFP28 to QSFP28, 100GBASE-CR4, Infiniband EDR, 26AWG, 3 m

BlueOptics CAB-Q-Q-100GbE-3M-BL is a 3-meter QSFP28 direct attach copper (DAC) cable designed for short-reach 100 Gbps links. The cable features QSFP28 to QSFP28 connectivity and supports 100GBASE-CR4 and InfiniBand EDR protocols, enabling high-bandwidth, low-latency interconnects between switches, servers and storage systems in data center environments. Constructed with 26 AWG conductors, this passive copper assembly provides a cost-effective solution for rack-to-rack and intra-rack connections where optical transceivers are not necessary.

Advantages

This QSFP28 DAC cable offers plug-and-play compatibility with QSFP28 ports and delivers line-rate 100 Gbps performance over a short distance without the need for additional transceivers or optical modules. The 26 AWG copper conductors provide reliable electrical signaling while maintaining manageable cable thickness for cable management in dense racks. The cable’s passive design reduces power consumption compared with active solutions and simplifies installation and replacement in high-density networking setups.

Suitable for

• Rack-to-rack 100G connections in data centers
• Intra-rack links between servers, switches and storage arrays
• Low-latency high-bandwidth interconnects for HPC clusters using InfiniBand EDR
• Short-reach 100GBASE-CR4 networking links where optical transceivers are not required

Key specifications

• Connector type: QSFP28 to QSFP28
• Supported protocols: 100GBASE-CR4, InfiniBand EDR
• Cable length: 3 meters
• Conductor gauge: 26 AWG
• Cable type: Direct attach copper (passive DAC)
• Typical application: Short-reach data center interconnects (rack-to-rack, intra-rack)

How to use

Connect each QSFP28 connector to the corresponding QSFP28 port on your networking equipment, ensuring both devices are powered down or follow hot-plug guidelines from the equipment vendor. The cable is intended for short-reach connections; route it through the rack using proper cable management to avoid sharp bends and excessive tension. Verify link status on connected devices and confirm that they are configured for 100GBASE-CR4 or InfiniBand EDR as required by your network setup.

Usage recommendations

For optimal performance, use this 3 m passive QSFP28 DAC in short-reach applications within the same rack or between adjacent racks. Avoid exceeding the recommended bend radius for 26 AWG copper cables and keep the cable away from high EMI sources. Check equipment compatibility and supported link modes before deployment to ensure proper operation at 100 Gbps.