Installation contactor hum-free 40A 4 NO contacts 230V Contactor hum-free according to EN 61095 and DIN VDE 0637-3 as well as contact protection according to DIN VDE 0106 part 100. Modular device with contact position indication by display window, integrated labeling field and suitable for subsequent mounting of additional equipment. DC solenoid system with protective circuit against overvoltage and for limiting interference voltage peaks, for hum-free continuous operation and ensures low switching noise. Notes: If several devices are installed directly, a spacer (1/2 PLE) must be installed next to every second device.