Staubli Multi Contact Solar Connector

Staubli/Multi Contact solar connectors are single-contact electrical connectors commonly used for connecting solar panels. MC stands for the manufacturer Multi-Contact (now Staubli) and the 4 refers to 4 mm diameter contact pin.

Solar connectors allow strings of panels to be easily constructed by pushing the connectors from adjacent panels together by hand, but require a tool to disconnect them to ensure they do not accidentally disconnect when the cables are pulled.

The solar connectors are universal in the solar market today, equipping almost all solar panels produced since about 2011. These newer solar connectors are rated at 1500 V 50A, which allows longer strings to be created and higher current to be passed.