MC4 connectors are single-contact electrical connectors commonly used for connecting solar panels. The MC in MC4 stands for the manufacturer Multi-Contact (currently Stäubli Electrical Connectors) and the 4 for the 4mm diameter contact 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 they do not accidentally disconnect when the cables are pulled.


  • Compatible with cables cross section area from 2.5mm2 to 6mm2
  • Degree of protection: IP67
  • Conductor made from pure cupper
  • 1000 Volt
  • Current Range: 20 to 30 Amp


  • MC4
  • Y-MC4