MCX is a type of connector developed in the 1980’s and used in the microwave transmission range. It carries frequencies of up to 6 GHz and is the second smallest of the subminiature connector families. At approximately 30% smaller than Subminiature B connectors (measuring in at 0.140 inches on the outer diameter of the plug), MCX is designed to completely minimize any leakage at its joints.

The MCX connector is used with a standard coaxial cable and features a snap-on interface in which the connectors are simply pressed together to join them. This tools free configuration is helpful in tight spaces but is prone to damage because of its very small size. However, the snap on interface, while easy to use, also means that there is a risk of connection failure under rugged conditions.

The actual contact and insulation are exactly the same as the SMB connectors; however there are a few distinct differences between the two connectors. MCX is smaller, allowing for more flexibility in cramped conditions. Furthermore, MCX connectors are available in a variety of different configurations, including right angles and linear connections.

Although small and low cost, MCX connectors are of very high quality and are crafted with high end materials, such as gold, for the best connections at such high frequency ranges. Furthermore, the connector gaskets on MCX are designed for all conditions and include silicone rubber for a snug fit. Also, the MCX connectors are designed to be used with a multitude of different cables, including miniature RG flexible coaxial cables and semi-rigid cables.