Lenovo Mellanox QSA QSFP28 to SFP28 Network Adapter 100G to 25G

The Lenovo Mellanox QSA (Quad Small Form-factor Pluggable to Small Form-factor Pluggable) adapter is a high-performance, passive network converter designed to bridge QSFP28 and SFP28 interfaces. It enables seamless connectivity between 100G QSFP28 ports and 25G SFP28 transceivers or cables, ensuring compatibility across diverse networking environments. Manufactured by Mellanox Technologies (now part of NVIDIA) and distributed by Lenovo, this adapter is ideal for data centers, enterprise networks, and high-performance computing (HPC) applications.

Advantages

This adapter provides a cost-effective solution for integrating 25G SFP28 devices into existing 100G QSFP28 infrastructure without replacing hardware. Its passive design ensures negligible power consumption and zero latency, while the hot-swappable plug-in module simplifies installation and maintenance. The metal housing offers durability and effective heat dissipation, supporting reliable operation in demanding environments.

Suitable for

• ThinkAgile HX2320 Appliance 7X83
• ThinkSystem NE10032 RackSwitch
• ThinkSystem NE2572 RackSwitch
• Other QSFP28-enabled devices requiring SFP28 connectivity

Key specifications

• Product Type: Network Adapter (QSFP28 to SFP28 Converter)
• Connector A: QSFP28
• Connector B: SFP28
• Max Data Rate (QSFP28 Side): 100 Gbps
• Max Data Rate (SFP28 Side): 25 Gbps
• Form Factor: Plug-in Module
• Technology: Passive Adapter
• Hot-Swappable: Yes
• Housing Material: Metal
• Power Consumption: Negligible (Passive)
• Operating Temperature Range: 0°C to 70°C (32°F to 158°F)
• Compliance Standards: RoHS, CE, FCC
• Interface: Ethernet
• Number of Ports: 1 (QSFP28) to 1 (SFP28) conversion
• Original Manufacturer: Mellanox Technologies (NVIDIA Networking)
• Reseller/Distributor: Lenovo
• Product Family: Mellanox QSA Series

Recommendations

For optimal performance, use with genuine Lenovo or Mellanox QSFP28 and SFP28 transceivers and cables. Ensure your device supports the QSA adapter for proper functionality. This adapter is not compatible with QSFP+ or SFP+ interfaces.