Below is a list of Amp Connectors manufacturers from Joliet, Illinois. Amp connectors, or Amphenol connectors, is a distinctive connector commonly used in various areas of electrical engineering. Amp connectors vary in amperage (the strength of an electric current), which determines their application. Amp connectors can be applied to either AC or DC applications and are used as PV array, small power and battery, solar panel array and sub-array connections, among others.