The Siemens 3RT1916-1DG00 is a SIRIUS surge suppressor with a built-in diode, designed to clamp the inductive kickback from DC-operated contactor coils. It covers a control supply voltage range of 12 to 250 V DC, making it suitable for most standard 24 VDC, 48 VDC, 110 VDC, and 220 VDC coil circuits found in industrial panels.
What It Does and Where It Mounts
The suppressor clips directly onto the coil terminals of a SIRIUS Size S00 contactor. The diode provides a path for the inductive flyback current when the coil de-energizes, preventing voltage spikes that could damage PLC outputs or other control electronics. It is a standard accessory for any DC-operated S00 contactor in a control panel.