The AC-1 resistive rating supports up to 1,200 operations per hour, while AC-4 (plugging/inching) caps at 250 ops/h, so match the duty cycle to your application. Mechanical life of 10,000,000 operations. Pollution degree 3 suits factory-floor environments.
Main circuit terminals are screw-type, accepting solid conductors from 0.25 to 2.5 mm² (2x) and stranded from 0.75 to 25 mm² (2x). That range covers most motor feeder cables up to about 6 AWG. The auxiliary contact block (if fitted) uses the same terminal style — no special crimp tools needed.