It is a 3-pole unit, meaning it switches and protects all three phases of a three-phase circuit. The 630 A rating at 40 °C through 50 °C (derated to 583 A at 70 °C) tells you this breaker is sized for a main feeder or a large motor branch circuit — the TM240 release provides fixed thermal and magnetic trip settings, so it is not field-adjustable for different cable sizes.
The interrupting ratings are given at several voltages: 121 kA at 240 V, 76 kA at 415 V and 440 V, 53 kA at 500 V, and 10.5 kA at 690 V.
The breaker measures 138 mm wide, 248 mm tall, and 110 mm deep. The depth of 110 mm includes the handle and terminals; allow clearance for cable bending radius and the auxiliary switch block. The auxiliary contact version is 1 auxiliary switch + 1 trip alarm switch HQ — that gives you one N.O./N.C. for status feedback and one dedicated alarm contact that changes state only on a trip event, useful for remote fault annunciation.