InfiniBand/fibre optic cable BlueOptics 845406-B21-BL 3 m QSFP28 Male/Male

The BlueOptics 845406-B21-BL is a 3 m InfiniBand/fibre optic cable with QSFP28 connectors on both ends, designed for high-speed interconnects in racks and adjacent rack spans. This QSFP28 male-to-male cable supports 100G data rates for short-distance links and is suitable for use in networking hardware that accepts QSFP28-to-QSFP28 direct attach connections. The BlueOptics cable follows common MSA-compliant form factor and is intended for reliable electrical high-speed transmission in data center and networking environments.

Advantages

The cable provides a compact, low-latency physical link with QSFP28 male connectors at each end and a 3 m length suitable for equipment-to-equipment connections within racks. As a passive direct attach twinax-style solution it offers low power consumption and reduced complexity compared with active optical modules for short runs. The construction uses industry-standard components to deliver consistent signal integrity, compatibility with major hardware platforms that support equivalent 100GBase-CR4 or InfiniBand electrical direct-attach connections, and an expected long service life when used according to specifications.

Key specifications

• Connector type: QSFP28 male to QSFP28 male
• Length: 3 meters
• Supported data rate: up to 100 Gbit/s per cable (protocol-dependent)
• Cable type: passive direct attach twinax-style for short-distance electrical transmission
• Form factor: MSA-compliant QSFP28

How to use

Insert each QSFP28 connector firmly into the matching QSFP28 port on the network devices until the latch engages. Ensure both devices support passive QSFP28 direct attach or equivalent 100GBase-CR4 electrical connections and that firmware or software settings permit passive DAC operation. Route the 3 m cable to avoid sharp bends, excessive tension or areas of high electromagnetic interference. For hot-pluggable systems, follow the device vendor’s hot-swap and ESD handling procedures when connecting or disconnecting the cable.

Recommendations

Use this 3 m QSFP28 direct attach cable for short intra-rack or adjacent-rack 100G links where a passive twinax-style connection is supported. Verify compatibility with the host hardware and firmware before deployment, keep bend radius and handling within vendor guidelines, and perform a link test after installation to confirm full-speed operation.