The 4 NO poles mean it can switch a 3-phase motor plus a separate load, or serve as a two-speed contactor with the fourth pole handling a common line.
Main circuit termination uses spring-loaded terminals accepting 2x (0.5 to 4 mm²) solid/stranded or 2x (0.5 to 2.5 mm²) with ferrules. That's a field-friendly wire range: no special tooling beyond a ferrule crimper. The IP20 front enclosure and finger-safe construction (IEC 60947-4-1 mirror contact compliance with 3RH29) mean you can work in the panel with the door open without extra guarding.
For Type 1 coordination, it's gG 35 A. That's the standard you need to hand the panel builder so they fuse upstream correctly — mismatch here and the contactor can weld in on a fault. The mirror contact feature (with the 3RH29 auxiliary block) satisfies the safety isolation requirement of IEC 60947-4-1 for applications where you need positive indication of the main contact state.