BlueOptics JL283A-BL InfiniBand fibre optic cable 3 m QSFP28 4xSFP28

The BlueOptics JL283A-BL InfiniBand fibre optic cable is a 3 m direct attach solution featuring a QSFP28 male connector on one end and four SFP28 male connectors on the other. Designed for short-reach, high-speed links, the cable supports up to 100 Gbps aggregated bandwidth using a 4x25G lane split and is intended for use in rack-to-rack or within-rack interconnects in data centres and networking equipment that accept QSFP28 to 4xSFP28 breakout connections.

Advantages

This QSFP28 to 4xSFP28 cable provides a compact, passive direct-attach option for high-speed InfiniBand and Ethernet environments. Its 3 m length and twinax construction enable low latency and low power consumption for short-distance connections. The product is manufactured to industry multi-source agreement (MSA) mechanical and electrical guidelines for QSFP28 breakout DACs and is compatible with commonly used hardware platforms that support the corresponding QSFP28/ SFP28 interfaces.

Suitable for

• High-speed server-to-switch and switch-to-switch connections within racks
• Short-reach aggregation of 100G links into 4×25G ports
• InfiniBand and Ethernet fabrics requiring QSFP28 to SFP28 breakout
• Data centre top-of-rack (ToR) and adjacent-rack cabling

Key specifications

• Cable length: 3 metres
• Connector type: QSFP28 (male) to 4×SFP28 (male) breakout
• Aggregate data rate: up to 100 Gbps (4×25G lanes)
• Cable type: passive direct attach (twinax) suitable for short distances
• Wire gauge reference: 26 AWG
• Compliance: designed to MSA guidelines for QSFP28 breakout DACs

How to use

Install the cable by inserting the QSFP28 end into the QSFP28 port of the source device and the four SFP28 ends into the corresponding SFP28 ports of the destination device or devices, ensuring correct alignment and full insertion until the connector latches engage. Confirm that the connected devices support passive QSFP28-to-4×SFP28 direct attach cables for the intended protocol (InfiniBand, Ethernet, FCoE or Fibre Channel) and configure the interfaces in the network equipment as required by the operating system or switch firmware. Monitor link LEDs and management interfaces to verify the link is up and negotiating at the expected speeds.

Recommendations

Use this 3 m passive QSFP28 to 4×SFP28 cable for short-distance connections inside racks or between adjacent racks. Avoid routing the cable through areas with excessive bending or mechanical stress; maintain the manufacturer’s minimum bend radius. For longer reaches or where active signal conditioning is required, consider optical transceivers or active DAC solutions compatible with your hardware.