SIEMENS 3RB3133-4UX1 – Overload relay | JUAL SIEMENS 3RB3133-4UX1 – Overload relay 12.5…50 A Electronic For motor protection Size S2, Class 5E…30E Stand-alone installation Main circuit: Straight-through transformer Auxiliary circuit: Spring-type terminal Manual-Automatic-Reset Internal ground fault detection