The fully wired reversing contactor assemblies are suitable for use in any climate. They are finger-safe according to EN 50274. The contactor assemblies consist of 2 contactors with the same power, with one NC contact in the basic unit. The contactors are mechanically and electrically interlocked (NC contact interlock). The 3RA13 contactor assemblies have screw connections and are suitable for screwing or snapping onto 35 mm standard mounting rails.