The Siemens 3RU2116-0EC0-ZX95 is a SIRIUS thermal overload relay in Size S00, designed for direct contactor mounting and motor protection in control panels. It carries a Trip Class 10 rating, meaning it will trip within 10 seconds at 7.2× the set current — the standard for standard-duty motor starts where the acceleration time stays under a few seconds.
Ratings and fit
Rated for main circuits up to 690 V, this relay covers 400 V, 480 V, 500 V, 600 V, and 690 V motor ratings with corresponding power and current values at each voltage level. The auxiliary switch is integrated, with switching capacities of 2 A at 24 V and 230 V, 3 A at 120 V, and 1 A at 400 V — enough to signal a PLC input or drop out a contactor coil. The spring-loaded terminals accept 2× (0.5 to 2.5 mm²) solid or stranded conductors, which speeds panel wiring versus screw-clamp variants.
Mounting and environment
Mounts directly onto the contactor via the integrated fastening method — no separate base required. The 45 mm width matches the S00 contactor footprint, so it fits standard 45 mm DIN-rail spacing when the contactor is rail-mounted. Operating temperature range is -40 to +70 °C, with temperature compensation active from -40 to +60 °C, making it suitable for unheated enclosure installations. Any mounting position is permitted.