These connectors are suitable for crimping on to 4 sq mm and 6 sq mm cables.
MC4 connectors are single-contact electric connectors commonly used for connecting solar panels. MC4 stands for the manufacturer Multi-contact and a 4 sq mm contact assembly pin. MC4s 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 that they do not accidentally disconnect when the cables are pulled.
