Siemens 3RU1126-4AB1 is a stand-alone thermal overload relay in the SIRIUS line designed to protect 3-phase motors, with a three-pole main circuit rated for 11–16 A per phase. It includes a 1NO+1NC auxiliary contact and uses screw-terminal connections, with a compact S0 size for tight installation spaces. Intended for standalone installation in motor-control panels, it pairs with compatible Siemens contactors to form a complete motor-protection solution, and it carries Class 10 thermal protection for reliable tripping performance.
