InfiniBand/fibre optic cable BlueOptics 40GBASE-CR4-PQSFPXA3MBU-BL 3 m QSFP Male/Male

The BlueOptics 40GBASE-CR4-PQSFPXA3MBU-BL is a 3 meter passive Direct Attach Copper (twinax) cable with QSFP-to-QSFP male connectors, designed for 40GBase-CR4 links in racks and between adjacent racks. It carries electrical signals over short distances and supports Ethernet, FCoE, Fibre Channel and InfiniBand applications at speeds up to 40 Gbps when used with compatible hardware that accepts QSFP passive DAC twinax cables.

Advantages

This 3 m passive QSFP-to-QSFP twinax cable provides low power consumption and low latency for short-range high-speed interconnects. It follows MSA-compliant specifications and is built from industry-grade components to ensure stable electrical performance. The passive design reduces complexity and failure points compared with active solutions, and its form factor enables straightforward rack-to-rack or in-rack connections.

Suitable for

• High-speed links between switches and routers in data center racks
• Interconnects between adjacent racks and top-of-rack equipment
• Storage system connections supporting 40G traffic
• Environments using Ethernet, FCoE, Fibre Channel or InfiniBand at up to 40 Gbps

Key specifications

• Length: 3 meters
• Connector type: QSFP (male) to QSFP (male)
• Cable type: Passive twinax copper (Direct Attach Cable)
• Maximum data rate: up to 40 Gbps
• Wire gauge: 30 AWG
• MSA-compliant QSFP form factor
• Typical power consumption: passive design (approx. 0.1 W per link)

How to use

Insert each QSFP male connector into the QSFP ports of the two compatible devices until the connector latches. Ensure both devices officially support passive QSFP twinax DACs and the 40GBase-CR4 electrical protocol. Verify link status and configuration on the connected hardware; if necessary, adjust port settings to enable 40G operation. Handle the cable by the connector housings and avoid sharp bends to preserve signal integrity.

Recommendations

Use this cable for short-range, high-bandwidth connections within racks or between neighboring racks. Confirm device compatibility with passive QSFP twinax cables before deployment and avoid exceeding recommended bend radius or placing the cable near strong electromagnetic interference sources.