Rated for AC-3 maximum switching frequency of 750 operating cycles per hour, and AC-4 at 250 cycles per hour — the AC-4 figure is the one that governs severe plugging or inching duty, so size the application against that, not the AC-3 headline. The 24 V rating is the full-load ampacity for a typical PLC-level signal; at 400 V the contact still carries 3 A for pilot-duty loads. The -25 °C low end is the floor for cold panel starts — no pre-heat required for a typical unheated enclosure in temperate climates.
Terminals accept solid or stranded wire from 0.5 to 4 mm², and up to 2x 4 mm² or 2x (0.75...2.5 mm²) for paralleled feeds. The screw-type clamp is standard for panel-builds where ring or fork terminals are preferred over spring cages.