That 630 A figure is the thermal baseline — at higher panel temperatures the breaker derates linearly: 612 A at 45 °C, 593 A at 50 °C, down to 520 A at 70 °C. For a panel running at 50 °C, you lose roughly 6 % of the headline rating, so size the breaker for the actual enclosure temperature, not the catalog number. The interrupting ratings are the other headline: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V. The ETU320 electronic trip unit handles the overcurrent protection curve. It's a microprocessor-based release with adjustable settings — not a fixed thermal-magnetic, so you can dial in the long-time pickup, short-time pickup, and instantaneous thresholds to coordinate with downstream breakers.
Front IP40 protection means it's splash-proof from the front but not sealed; keep it inside an enclosure rated for the environment. If you need those, the basic switch core is order code 3VA2463-5HL32-0AA0, and the integrated auxiliary trip is 3VA9608-0BB25 — those are the building blocks for adding accessories in the field.