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. 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.
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.