The AC-3 rating at 500 V reaches 18.5 kW, suited for standard squirrel-cage motors during starting and stopping. For heavy inching or plugging duty (AC-4), it manages 10 kW at 690 V. Mounting is via screw or snap-on onto a 35 mm DIN rail per EN 50022, with a width of 55 mm, depth of 115 mm, and height of 112 mm. Pollution degree 3 applies, so it's rated for industrial atmospheres with conductive pollution.
Main circuit terminals are screw-type, accepting solid conductors from 0.25 to 2.5 mm² (two per clamp) and stranded conductors from 0.75 to 25 mm² (two per clamp). An alternative stranded range of 0.75 to 16 mm² is also listed. For panel builders, this means you can land a 25 mm² stranded cable on the main poles without adapters, but the control circuit (coil) terminals typically use the smaller solid range. No derating is implied by the evidence for zero-gap mounting, but verify thermal dissipation if you're running near the AC-4 limit at 250 operations per hour.
Environmental limits and mechanical life
Electrical life depends on the duty cycle: AC-1 (resistive) allows up to 1,200 operations per hour, AC-3 up to 1,000, and AC-4 drops to 250.