ABB it has a large family of contacters: tripolar contacters and overload relays for engine startup and power switching (AF, minicontactors, AS), tetrapolars for switching the power (AF and minicontactors), auxiliary for the switching of auxiliary circuits (AS and minicontactors), for the switching of capacitors (UA.RA), CC.
The reference 1SAZ721201R1005 specifically, is a thermal overload relay.
Its features are: Adjustable current range: 0.1 - 0.13 A, Maximum nominal service voltage Ue: 690V, Main current circuit connection type: Roscade connection, Normally closed auxiliary contact number: 1, Normally open auxiliary contact number: 1, Number of auxiliary contacts as change contact: 1, Type of shooting: CLASSE 10, Automatic reset function, Pushbutton reset function.