The Siemens SENTRON 3VA2063-6HN32-0HH0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from -25 °C to 70 °C — no derating needed up to 70 °C, which simplifies panel sizing in warm enclosures. Its interrupting capacity hits 242 kA at 240 V AC and still holds 187 kA at 415/440 V, so it clears high-fault conditions without cascading upstream — a solid choice for main or branch protection in high-available-fault-current installations.
Power loss is rated at 5.4 W maximum — low enough that thermal rise inside a sealed enclosure stays manageable without forced ventilation for most single-breaker installations.