The Siemens 3RT6916-1CC00 is a SIRIUS RC-type surge suppressor designed to clip onto size S00 contactors and contactor relays. It suppresses voltage spikes from the coil circuit, protecting downstream electronics and extending contact life. Rated for 48…127 V AC at 50/60 Hz and 70…150 V DC, it handles both AC and DC control supplies — a single part number covers mixed-voltage panels.
Clip-on fastening to the contactor body — no extra DIN-rail slot needed. The 9 mm depth and 28 mm width keep the assembly within the S00 footprint, so it doesn't crowd adjacent components in a dense panel.