The interrupting ratings tell you where this breaker can sit in a fault-current study: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. Four poles with adjustable neutral protection (OFF, 50%, 100% of phase rating).
Trip unit and integration
The ETU350 electronic trip unit provides LSIG protection (long-time, short-time, instantaneous, ground-fault) with adjustable curves — the kind of selectivity you need for a main or feeder breaker in a distribution panel. Dimensions are 181 mm high, 140 mm wide, 86 mm deep, so it fits the standard SENTRON 3VA2 mounting footprint for a 4-pole frame.