The Siemens 3RT7916-1BC00 is a surge suppressor varistor designed to plug directly onto 3RT7 S00 frame contactors. It fits the S00 contactor footprint and suppresses voltage spikes from the coil circuit, protecting downstream electronics and extending contactor life.
Deployment context
Designed for snap-on mounting onto the contactor coil terminals — no additional wiring or DIN-rail space needed. Common in control panels where a contactor drives inductive loads (motors, valves, solenoids) and the varistor clamps the flyback voltage at coil de-energization.