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what is the material used for MCCB Lugs?

MCCB copper body material terminals are compatible with copper wire, only. By definition, then, this terminal will have no under plating or striking; it will merely have a top plating (tin, for example) to help improve conductivity and inhibit corrosion.

 

MCCB aluminum body material terminals are compatible with aluminum wiring or copper wiring. By definition, then, this terminal is built with tin plating and copper striking, thus making it compatible with both aluminum and copper wiring.

 

Terminal plating materials (for top plating) generally consist of one of three types, or combinations of these materials: nickel, tin, silver, with tin being the predominant choice as a MCCB terminal plating material.