CBO InfiniBand QSFP28 Cable CAB-Q28-Q28-5M-BL — 5 m, QSFP28 to QSFP28, passive copper

This CBO InfiniBand QSFP28 cable (5 m, QSFP28 to QSFP28, passive copper) is a short-range high-speed interconnect designed for direct attachment between compatible QSFP28 ports in switches, servers and storage systems. The assembly supports 100Gbps-class links with low electrical latency and is intended for use inside racks and between adjacent racks in data-center environments where a reliable, low-cost copper connection is preferred over optical transceivers for distances up to five meters.

Advantages

The passive copper construction provides consistent low-latency performance without the need for additional power or active electronics, simplifying deployment and reducing operational complexity. As a purpose-built QSFP28-to-QSFP28 assembly, it offers plug-and-play compatibility with devices that accept standard QSFP28 passive copper cables and delivers a predictable electrical channel for short link lengths. The 5 m length balances reach and signal integrity for typical rack-to-rack or within-rack connections.

Suitable for

• High-density data-center rack interconnects
• Direct server-to-switch or switch-to-switch links within a single row of racks
• Storage system connections requiring 100Gbps-class links
• Short-reach InfiniBand fabric segments and test lab setups

Key specifications

• Cable type: Passive copper twinax assembly
• Connector type: QSFP28 to QSFP28
• Link capacity: Supports 100Gbps-class electrical interfaces
• Length: 5 meters
• Use case: Short-range, within-rack and adjacent-rack interconnects
• Latency: Low electrical latency suitable for InfiniBand and high-performance Ethernet

How to use

Insert each QSFP28 connector into the corresponding QSFP28 port until the connector latches. Ensure that both devices are powered off when possible during initial insertion to avoid hot-plug transients, and verify link status through the host device management interfaces after connection. Use the cable within recommended bend radius limits and avoid sharp kinks or tension on the assembly. For best signal integrity, route the cable away from high-interference power runs and secure it to rack cabling management to prevent strain on ports.

Usage recommendations

Use this passive QSFP28 copper cable for short-range 100Gbps-class links where low-latency and cost efficiency are priorities. Avoid using the cable beyond the specified 5 m reach and confirm device compatibility with passive copper QSFP28 assemblies before deployment to ensure reliable link negotiation and performance.