Installation contactor, hum-free, manual operation on/off/auto 25A, 2S, 230V. Hum-free contactor with touch protection in accordance with DIN EN 61095 (DIN0637-3) with manual switching (manual-0-auto) on the device, contact position display through display window, integrated labeling field and suitable for subsequent installation of additional equipment. DC magnet system with protective circuit against overvoltage and to limit 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.