Phoenix Contact 1410661 The coupler connector is a three-position version that can only be released with a specialized tool and features a black color scheme. It has a minimum conductor cross-section of 1.5 mm² and a maximum of 6 mm², making it suitable for applications with currents up to 35 A at rated voltage levels of 690 V AC. This connector type uses a screw connection method and socket contact type, while also accommodating cables with diameters ranging from 8 mm to 21 mm in diameter, including a variant designed specifically for tool-assisted release.