Staircase lighting controller (switch-on function), retriggerable, with zero-crossing circuit, for DIN rail, 17.5 mm wide, 1 NO contact for 16 A / 250 V AC, contact material AgSnO2, time range 0.5 to 20 min. suitable for N circuit, the base point of the button and the L connection of the load are at point 3. Lamp loads: incandescent and halogen lamps 3000 W, energy-saving lamps 600 W, LED (230 V AC) 600 W, LV halogen lamps or LED with electronic ballast 600 W, LV halogen lamps or LED with conventional ballast 1500 W, fluorescent lamps with electronic ballast 1500 W, fluorescent lamps with conventional ballast 1000 W, connection voltage: 230 V AC All connections on the lower side. For retrofitting existing systems and as a replacement. The buttons must be suitable for switching the lamp load