An auxiliary switch is integrated, saving a separate add-on block for status feedback.
The contactor's mechanical lifetime is rated 30 million operations typical — that's the mechanical endurance of the main contact structure, not the electrical load switching life. For a furnace line cycling once per minute, that's roughly 57 years of mechanical wear before the armature or springs need attention. Electrical life depends on the load: at AC-1 (resistive) it can switch 1 000 operations per hour maximum; at AC-3 (motor start/run) that drops to 750 per hour; at AC-4 (plugging, inching) it's 250 per hour. The AC-3e rating matches the AC-3 figure at 750 per hour, so motor duty is the design center.
Wiring and terminal capacity
For two conductors in parallel, the range is 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or 2x 4 mm². The magnet coil uses screw-type terminals, so no special crimp tooling is needed for the control wiring.