Siemens sirius 3rt19 contactor and 3rh19 din rail control relay siemens 3rt1926 1cd00 the siemens sirius rc element 3rt1926 1cd00 is supplied without led the s0 size relay is for fitting onto the coil terminals at the top or the bottom the relay has a dual voltage of 127 to 240v ac and 150 to 250v dc siemens 3rt1926 1cd00 rc element s0 127 240 vac 150 250 vdc