solid-state time-delayed front-side auxiliary switch Time range 0.5...10 s, 100 ... 127 V AC, 1 NO contact, 1 NC contact ON delay, for 3RT1 auxiliary switch SIRIUS 3RT19, slow-operating, for switching operations involving time delays, for mounting on 3RT1 contactors. Operating range for 3RT105, 3RT1.6 and 3RT1.7 contactors. Can be used worldwide thanks to international approvals and wide voltage range. Available for contactors S6 to S12, in various voltages and time ranges. SIRIUS relays - one range for every application.