InfiniBand/fibre optic cable BlueOptics JNP-100G-4X25G-1M-BL 1m QSFP28 4xSFP28

The BlueOptics JNP-100G-4X25G-1M-BL is a 1 meter QSFP28 to 4xSFP28 direct attach cable (DAC) designed for short-distance, high-speed connections in rack and adjacent-rack environments. This passive twinax copper assembly follows MSA guidelines and supports 100GBase-CR4 / 4x25GBASE-CR electrical transmission over a single meter with 26 AWG conductors. It is suitable for use with switches, routers, storage arrays and other networking hardware that accept QSFP28 to 4xSFP28 DACs and is intended for Ethernet, Fibre Channel, FCoE and InfiniBand applications up to 100 Gbps per link.

Advantages

The cable provides a low-latency, low-power connection option with passive operation (no active electronics) and minimal insertion loss for short links. Construction uses high-quality components and industry-standard connectors to achieve reliable signal integrity and long service life. Its 1 m length and QSFP28 to 4xSFP28 breakout make it convenient for linking 100G ports to multiple 25G ports without additional transceivers, reducing cost and complexity in dense rack deployments.

Suitable for

• Top-of-rack and adjacent-rack interconnects in data centers
• Connecting QSFP28 100G ports to 4x25G SFP28 ports for switches and routers
• Short-reach high-bandwidth links for storage systems and compute nodes
• Environments using Ethernet, FCoE, Fibre Channel or InfiniBand protocols

Key specifications

• Cable type: passive twinax copper (Direct Attach Cable)
• Connectors: QSFP28 to 4×SFP28 breakout
• Length: 1 meter
• Supported data rate: up to 100 Gbps (4×25G lanes)
• Conductor gauge: 26 AWG
• Standards: MSA-compliant QSFP28 / SFP28 electrical interface for 100GBase-CR4 / 4x25GBASE-CR

How to use

Install the BlueOptics QSFP28 end into the 100G QSFP28 port and plug the four SFP28 ends into the corresponding 25G SFP28 ports on the target device. Ensure both devices support passive DACs and the intended 100GBase-CR4 / 4x25GBASE-CR electrical protocol. Route the cable to avoid sharp bends and mechanical stress; maintain recommended bend radius for twinax assemblies. After physical connection, verify link status and negotiated speeds in your network equipment management interface and adjust port configuration if necessary.

Recommendations

Use this passive DAC for short-distance direct connections within racks or between adjacent racks. Confirm hardware compatibility with QSFP28-to-4×SFP28 passive assemblies in vendor documentation, and avoid exceeding the 1 m recommended routing distance to ensure optimal signal integrity.