The Siemens SIRIUS 3RU1116-1JC1 is a thermal overload relay in size S00, trip class 10, designed to protect motors against overload and phase failure. It mounts stand-alone and accepts Cage Clamp terminals for the main circuit — 2x (0.5... 2.5 mm²) solid or 2x (0.5... 1.5 mm²) finely stranded with ferrule. The AC-3 rated maximum voltage is 690 V, making it suitable for 400 V three-phase motor circuits common in European and ATEX-classified installations. Trip class 10 means the relay will trip within 10 seconds at 7.2× the set current — fast enough to protect standard induction motors on pump, fan, and compressor loads without nuisance trips during start-up. The 6 kV surge voltage resistance covers the impulse withstand expected in industrial control panels with proper surge suppression upstream. Power dissipation runs 6.6 W in hot operating state (2.2 W per pole), which factors into enclosure thermal budgeting when several relays are ganged.
Mounting and integration
The 3RU1116-1JC1 is sized for stand-alone installation, not clip-on to a contactor. Dimensions are 45 mm wide, 92 mm high, 78 mm deep — fits a standard DIN-rail footprint but requires 6 mm side clearance and 0 mm vertical clearance above/below. Mounting position is flexible: vertical surface with ±135° rotation and ±45° tilt front/back. Altitude derating applies above 2000 m. Front face carries IP20 protection — suitable for enclosed panels, not open washdown. The Cage Clamp terminals accept 2x (0.5... 2.5 mm²) solid or 2x (0.5... 1.5 mm²) finely stranded with ferrule; AWG equivalent is 2x (24... 14). No auxiliary contacts are built in; if you need signal feedback for a PLC or safety circuit, add a separate auxiliary contact block.