The Siemens 3RU1116-1CB0-ZW98 is a SIRIUS thermal overload relay in Size S00, designed for 3-pole motor protection up to the CLASS 10 trip characteristic — meaning it will trip within 10 seconds at a cold start under locked-rotor conditions, which is the standard for standard induction motors driving pumps, fans, and conveyors. It mounts directly onto a contactor (contactor mounting) and uses screw-type terminals for both the main and auxiliary circuits, accepting solid wire from 2x (0.5... 1.5 mm²) and 2x (0.75... 2.5 mm²) per pole.
Trip Class 10 is the headline: it defines the maximum trip time at 7.2× rated current. For a motor starting a high-inertia load (like a centrifuge or crusher), a CLASS 10 relay may nuisance-trip during start-up — in that case you'd step up to CLASS 20. For most general-purpose motor circuits, CLASS 10 is the correct choice. The auxiliary contact ratings cover common control voltages: 1 A at 24 V, 3 A at 120 V, 2 A at 230 V, and 1 A at 400 V — these are the make/break capacities for the N/C and N/O contacts wired into the control loop.
This relay clips directly onto a SIRIUS contactor of matching Size S00 — no extra bracket or wiring between the contactor and relay.