The 3RB1246-1PG30: The 1.25...6.3 A range covers small to mid-size motors on S00/S0 contactor frames — think fractional-horsepower pumps, small conveyors, or fan motors up to about 3 kW at 400 V. The Class 5...30 adjustment means the relay can be set to trip faster (Class 5) for motors that start unloaded, or slower (Class 30) for high-inertia loads that draw starting current for several seconds. The integrated ground-fault detection is a useful layer: it monitors for leakage to earth and can trigger a separate output, which is not something every basic overload relay offers. The monostable outputs for overload warning give a clean signal to the PLC or annunciator that clears when the fault is gone.
Deployment context
Individual mount means this relay clips onto the S00/S0 contactor or mounts separately on the DIN rail — no extra adapter needed. The screw terminals on the auxiliary side are straightforward for panel wiring; strip length and torque follow standard Siemens practice for the S00/S0 family.