The NR U3 delay relay is an electronic timer with a relay output for delayed switching on and off of secondary consumers. If required, the relay can also be used as a pure switch-on delay without a delay time. The switchable operating modes and the wide range of adjustable running times mean that the NR U3 relay can be used in a wide variety of ways., Switch-on delay approx. 0.3s - 4min, delay time approx. 6s - 30min, dimensions: 43x43x18.5mm, 230V AC - 1 changeover contact (potential-free) 10A