What you're sourcing
The ABB 1SAZ211201R1013 sits in the solid state overload relay class under the broader Circuit Breakers, Fuses & Protection / Relays line, which is the device category motor-protection panels use to supervise running current and trip the contactor upstream when a sustained overload is detected.
Where it fits
Solid state overload relays of this class are paired with a matching contactor frame and wired into the motor branch so the relay's output terminals open the contactor coil on a trip — that is the functional job the 1SAZ211201R1013 is specified into, not a stand-alone protective device on its own.