The screw-type terminals on the magnet coil and main contacts take solid or stranded wire from 0.5 up to 4 mm², which covers most panel wiring for this frame size.
The contactor is rated for AC-3 duty at 400 V at 3 A — that's the motor-switching current, which is the number that matters for sizing on a standard three-phase induction motor. The AC-3 rating governs the make/break of locked-rotor current, so a 3 A AC-3 contactor handles a motor drawing roughly 3 A at full load. The mounting position is flexible: ±180° rotation on a vertical surface, plus ±22.5° tilt forward/backward, which helps when the rail is at an odd angle in a retrofit panel.
The Size S00 footprint is 45 mm wide, 58 mm tall, and 73 mm deep — a compact envelope that leaves room for auxiliary contact blocks or overload relays on the same DIN rail. The auxiliary switch is present on this variant, so you get a feedback contact without adding a separate block. Clearance around the contactor: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the sides. That's tight enough for dense panel layouts, but watch the heat dissipation if you're packing multiple contactors side by side at full rated current.