What it is and where it sits
ABB 1SAM450000R1006 is a motor starter accessory in the Contactor & Starter Accessories & Parts line under Contactors and Starters within Circuit Breakers, Fuses & Protection. The listing names it a motor starter by ASEA BROWN BOVERI. In a starter system the part is the kind of module that drops onto the same DIN-rail ecosystem as the contactor and overload — sized to complement, not replace, the line's main switching device.