What the line item is
The ABB 1SBL161001R8410 is catalogued as an electrical contactor under Contactors and Starters, with the parent trail Circuit Breakers, Fuses & Protection › Contactors and Starters › Electrical Contactors, and carries the part-number string 1SBL161001R8410 on the description line.
Where this class of part sits in the panel
Electrical contactors in this ABB family switch load-side circuits under coil command, taking the place of a manual switch when a control system needs to make and break the line repeatedly.