Top InfiniBand QSFP & CXP Connector Manufacturers

Published on February 12, 2026

This page compares leading QSFP and CXP connector manufacturers for InfiniBand. These connectors are used in high performance data centers.

• QSFP (Quad Small Form factor Pluggable): The standard for “4x” InfiniBand links. It has evolved through generations like QSFP28 (EDR) and QSFP56 (HDR).

• CXP: A larger connector designed for “12x” links, offering high density. It is often used for clustering and high bandwidth switch to switch connections.

Top Manufacturers of InfiniBand Connectors

Amphenol: The company manufactures high speed I/O. They are a primary driver behind the standards for QSFP-DD (Double Density) and CXP. Their connectors are found in almost every major InfiniBand Switch.

Radiall: The company is leader in high integrity signal connectors. They are popular for phased array connectors. They specialize in the mechanical durability of these interfaces, ensuring low insertion loss which is a critical requirement for the EDR and HDR metrics.

Samtec: The company is industry leader for “inside the box” high speed connectivity. While they make QSFP housings, they are most famous for the high density array connectors that link the SoC to the external QSFP/CXP ports.

MIcable: The company is specialized in the precision cable assemblies that use these connectors. They are manufacturer of cable side of the QSFP interface.

Mellanox (NVIDIA Networking): As the primary developer of InfiniBand technology, they manufacture their own branded QSFP and CXP transceivers and cables (the LinkX line) to ensure 100% compatibility with their own infiniband switches.

Molex: The company is a pioneer in CXP format. It is known for thermal management solutions (heatsinks) built directly onto the QSFP cages.

TE Connectivity: The company is manufacturer of the physical cages and connectors. They are often the ones producing the SMT (Surface Mount Technology) components that are soldered onto the PCBs of various devices.

Summary