The Siemens SIRIUS 3RT1916-1GA00 is a plug-in additional load module that mounts directly onto 3RT1.1 / 3RH1 contactors in size S00. It integrates RC-element surge suppression for the coil circuit, handling AC/DC control supply voltage from 180 to 255 V at 50/60 Hz. This module saves panel space and wiring time compared to a separate external suppressor — it snaps onto the contactor's front, not the DIN rail.
The manufacturer lists the lifecycle stage as current, but the description flags this as a phased-out product with an official successor: the SIRIUS 3RT2916-1GA00. The successor 3RT2916-1GA00 is the preferred drop-in replacement if your panel can accept the newer series.
What the RC element means on a contactor coil
The RC (resistor-capacitor) suppressor across the coil terminals dampens the voltage spike when the contactor de-energizes. That matters for two reasons: it reduces electromagnetic interference radiated back into the control wiring, and it protects the PLC output or relay contact driving the coil from arc erosion. For a 180-255 V AC/DC coil on a size S00 contactor, the RC module is the standard factory-matched suppressor — no need to calculate RC values yourself.
This module plugs onto the contactor's front face — no additional DIN-rail footprint. Verify the contactor base is a 3RT1.1 or 3RH1 in size S00; the 3RT1916-1GA00 will not fit larger frame sizes or the newer 3RT2 series without an adapter.