GC4020M5 2 Pole Contactor, 40 A, 230 V ac Coil. TeSys GC Modular Contactors from Schneider Electric provides power switching in single phase, 3 or 4-phase loads. TeSys GC is a range of contactors that are safe, simple to use, and easy to install. The devices are compact in size and suitable for use in a wide variety of applications.