That 63 A rating holds flat from 40 °C through 50 °C — no derating needed in a typical warm panel — then drops to 60.6 A at 55 °C and 53.6 A at 70 °C, so the thermal environment inside the enclosure matters if you're pushing the full 63 A. Breaking capacity is the headline number that decides fault-clearing confidence: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 3.4 kA at 690 V. At 415 V — the most common industrial distribution voltage in many markets — 121 kA SCCR means this breaker can interrupt a bolted fault at that level without cascading upstream, which simplifies selective coordination studies.
Maximum power loss is 5.4 W, which is modest for a 63 A frame and won't drive significant internal heating in a ventilated panel.
The base switch is order code 3VA2063-5HL32-0AA0; the integrated auxiliary trip is 3VA9688-0BL30. Both are active line items, which means spare parts and replacement modules are straightforward to source.