Overload relay 12.5...50 A For motor protection Size S2, Class 5...30 Stand-alone installation Main circuit: straight-through transformer Auxiliary circuit: Screw terminal Manual-Automatic-Reset Internal ground fault detection !!! Phased-out product !!! Successor is SIRIUS 3RB3 Preferred successor type is >>3RB3133-4UW1<< Simple, efficient and always up to date - SIRIUS modular system