What this RC snubber does on an S00 contactor coil
The 3RT2916-1CC00-ZX90 is a surge suppressor with RC elements designed to clip directly onto Siemens SIRIUS S00 contactors and relay sockets. It suppresses voltage spikes from the coil when de-energized, protecting nearby PLC outputs and extending contact life. Rated for AC control supply voltages from 48 to 127 V at 50/60 Hz and DC from 70 to 150 V, it covers the common 110 VAC and 125 VDC control voltage ranges used across industrial panels.
DIN-rail footprint and panel fit
The suppressor measures 9 mm deep, 28 mm wide, and 46 mm tall — it adds negligible depth to the contactor stack. Clip-on fastening to the contactor's DIN-rail mount means no extra wiring or panel space is needed. Mounting position is any orientation, and the operating temperature range is -25 to +60 °C, with storage from -40 to +80 °C. This suits it for unheated cabinets and outdoor-rated enclosures within the S00 contactor's envelope.
Lifecycle and sourcing reality
The multi-unit packaging (ZX90 suffix) indicates it ships in bulk packs rather than single units — factor this into kitting if your MRO crib issues individual pieces.