What this code resolves to
The ABB 1SAZ721201R1013 is a solid state overload relay sitting in the Circuit Breakers, Fuses & Protection / Relays / Solid State Overload Relays branch, so a buyer landing on this code is specifying an electronic motor-overload module rather than a thermal bimetallic unit or a fuse.
Where it lands in a panel
Solid state overload relays in this class mount alongside the contactor it protects, sense motor current through integrated transformers, and trip the contactor coil on sustained overload — so the 1SAZ721201R1013 governs motor-circuit protection, not branch-circuit short-circuit protection, and is paired upstream with a breaker or fuse sized for the SCCR.