Termination and wiring
The 3RT2018-1AU61: The magnet coil uses screw-type terminals — confirm the screwdriver bit size for the terminal torque spec before final torquing.
Duty cycle and mechanical endurance
Rated for 30,000,000 mechanical operations typical — this is the unloaded mechanical life. The switching rate limits per duty class: 1,000 cycles/h at AC-1, 750 cycles/h at AC-2, AC-3, and AC-3e, and 250 cycles/h at AC-4. The arcing time at AC is 4…15 ms. The auxiliary contact ratings span from 10 A at 24 V down to 0.2 A at 440 V — verify the load voltage and current against the switching curve for the specific control circuit, particularly at higher voltages where the make/break capacity drops.
The thermal envelope suits most indoor panel environments without special derating.