The Siemens 3VA2163-5MN32-0AE0 is a 3-pole SENTRON molded case circuit breaker rated 63 A continuous current at 40 °C, with a rated insulation voltage of 800 V. It's the motor protection variant, meaning the ETU350M electronic trip unit is programmed for the thermal and magnetic curves a motor load draws — not a straight feeder breaker.
Breaking capacity across voltages — where it holds and where it drops
At 415 V and 440 V it still delivers 121 kA; at 500 V it drops to 75.6 kA; at 690 V it's 17 kA. The 63 A rating holds flat from 40 °C to 50 °C, then derates to 60.48 A at 55 °C and 56.7 A at 70 °C. Mount it in a warm corner of the panel and you lose headroom; keep the ambient below 50 °C to get the full 63 A.
What the ETU350M release and aux contacts buy you
Storage and operating temperature range
The storage limit is wider because the breaker isn't carrying current — that's the handling and warehousing spec, not the running limit.