The 3RT6926-1CC00 is a SIRIUS RC-element surge suppressor sized for S0 contactors. It clips onto the contactor coil terminals — no extra wiring space needed — and suppresses voltage spikes from inductive kickback on AC or DC control circuits. The RC network handles 48–127 V at 50/60 Hz and 70–150 V DC, so it covers common control voltages across both domains without swapping modules.
Clip-on fastening means it snaps directly onto the contactor's coil terminals — no DIN rail footprint consumed, no screws. The 12 mm depth keeps it inside the contactor envelope, so it doesn't steal clearance from adjacent devices in a dense row. Mounting position is unrestricted, which helps when the contactor is oriented sideways or upside-down in a tight enclosure.