The Siemens SIRIUS 3RT2926-1CC00-ZX90 is an RC-type surge suppressor designed to clip onto S0-frame contactors. It suppresses voltage spikes across the coil during switching, protecting downstream electronics and extending contactor life. Rated for AC control supplies at 48 to 127 V (50 Hz) and DC supplies at 70 to 150 V, it covers the common control voltages found in European and North American panels. The AC/DC dual rating means one part number handles both supply types, simplifying BOM management. The suppressor snaps onto the contactor's coil terminals without additional wiring — a clip-on fastening method that keeps installation inside the panel to under a minute. It occupies the S0 frame's dedicated accessory slot, so it doesn't add width to the contactor stack.
Dimensions: 30 mm wide, 19 mm tall, 12 mm deep. The compact profile fits inside the contactor's envelope — no extra panel space required. Mountable in any position, which simplifies layout in crowded enclosures. The clip-on attachment means no screwdriver is needed for installation or replacement — a time-saver during commissioning or a swap under a tight window.