The 3RT1935-5AT61 is designated as a phased-out product with the successor being the SIRIUS 3RT2 series. For new builds or replacements where the panel design allows, the 3RT2 coil is the drop-in functional upgrade.
Integration Note
The coil mounts onto SIRIUS Size S2 contactors via the standard screw terminal interface. Verify the control voltage matches the 600 V AC 60 Hz rating before energizing — a 50 Hz coil on 60 Hz supply will overheat, and vice versa. The screw terminal accepts solid or stranded copper wire; torque to the contactor manufacturer's specification for reliable long-term connection.