RC surge suppressor for S00 contactors
The Siemens 3RT2916-1CE00-ZX90 is a SIRIUS RC surge suppressor designed to clip onto contactors and relay sockets in the S00 frame size, suppressing voltage spikes across the AC coil.
It clips directly onto the contactor or relay — the 9 mm depth keeps the assembly within the standard S00 envelope, and the 28 mm width matches the contactor face so it doesn't overhang adjacent components on the DIN rail. Mounting position is unrestricted, which helps when the panel layout forces a horizontal or inverted orientation on the rail.