What the ratings mean for fit
The Siemens 3RU1116-0KB1 is a SIRIUS-brand thermal overload relay in Size S00, designed for 3-pole main current circuits with screw-type terminals. Trip Class 10 means it will trip within 10 seconds at 7.2× the set current — standard for protecting standard induction motors during start-up without nuisance tripping on normal acceleration profiles. The 78 mm depth, 45 mm width, and 87 mm height fit the S00 footprint common in Siemens motor starter assemblies. Mounting position allows ±135° rotation and ±45° tilt from vertical, giving panel builders flexibility in tight enclosures. Screw-type terminals on both main and auxiliary/control circuits accept solid conductors from 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²), with AWG equivalents for main contacts at 1x (20–16), 1x (18–14), and 1x 12. This covers the typical motor control wiring range for fractional to small integral-horsepower motors.
Sourcing and lifecycle
The part carries ATEX protection type DMT 98 ATEX G 001 for use in potentially explosive atmospheres, and its reference code per IEC 81346-2 is F. Surge voltage resistance is rated at 6 kV.
Environmental and mechanical limits
Operating temperature range is -20 to +70 °C, with storage and transport range from -55 to +80 °C. Relative humidity during operation can reach 100 %, so the relay handles condensing environments common in washdown or outdoor cabinets. Shock resistance is 8g for 10 ms. IP20 protection on the front means the relay is finger-safe but not sealed against moisture ingress — mount inside a suitable enclosure for wet or dusty locations. Stand-alone installation is the specified fastening method, with 0 mm clearance required upwards, forwards, backwards, and downwards, and 6 mm at the side.