The Siemens 3RU1116-0HB0-ZW96 is a SIRIUS thermal overload relay in Size S00, designed to protect three-phase motor circuits against overload and phase failure. It mounts directly onto a contactor (contactor mounting per), saving DIN-rail space in the panel. The CLASS 10 trip characteristic means it will trip within 10 seconds at 7.2× the current setting — fast enough to protect standard induction motors during a stall or jam.
What ships in the carton?
The relay comes with screw-type terminals for both the main current circuit and the auxiliary/control circuit. The terminal blocks accept solid conductors: 2x (0.5... 1.5 mm²) and 2x (0.75... 2.5 mm²) per, with the same range for finely stranded wire with core-end processing per. AWG equivalents are 2x (20... 16) and 2x (18... 14) for the main circuit, plus 2x (20... 16) and 2x (18... 14) for the auxiliary contacts per and. No separate accessory pack is needed for basic wiring — the terminals are integral.
Clearances and mounting position
Physical envelope: 87 mm high, 45 mm wide, 78 mm deep. Required clearances to adjacent components: 0 mm upwards, 0 mm forwards, 0 mm backwards, 0 mm downwards, and 6 mm at the side. The mounting position is flexible — the relay can be mounted on a vertical surface with ±135° rotation and ±45° tilt to the front and back. That covers most panel layouts without derating.
Environmental and electrical ratings
Operating temperature range is -20 to +70 °C; storage and transport range is -55 to +80 °C. Relative humidity during operation can reach 100 %. Shock resistance is rated at 8g for 10 ms. Surge voltage resistance is 6 kV. The front face carries IP20 protection — suitable for finger-safe touch inside an enclosed panel, but not for washdown environments. Power loss per pole is 1.6 W. Rated operational currents vary by voltage: 1 A at 24 V, 0.22 A at 110 V, 3 A at 120 V, 0.22 A at 125 V, 0.11 A at 220 V, 2 A at 230 V, and 1 A at 400 V.