Auxiliary contact switching capacity across voltages
The 3RT2518-1BF40: These ratings tell you the maximum current the auxiliary contacts can break at each voltage — useful for sizing the control transformer and selecting downstream PLC input modules. At 110 V AC (the coil rating), the auxiliary contacts are rated 1 A. If you're driving a contactor from a 110 V control circuit, that's the current ceiling for the feedback signal or interlock loop.
Terminal capacity and wiring flexibility
This range covers most control wiring (1.5 mm² for signal, 2.5 mm² for power feeds) without needing ferrule adapters.
No stock-holding claim — quantities are lot-specific and quoted per BOM.