The Siemens SENTRON 3VA1163-4EF32-0DA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C, with a TM240 thermal-magnetic overcurrent release. The interrupting ratings are 121 kA at 240 V and 75.6 kA at 415 V, which covers most industrial service-entrance and distribution panel fault levels. An undervoltage release (UVR) is fitted as standard; the integrated auxiliary trip uses order code 3VA9608-0BB25.
Interrupting capacity and thermal derating
The 121 kA at 240 V is the headline number for North American 240/120 V split-phase panels; the 75.6 kA at 415 V covers European 400 V three-phase distribution. The 63 A continuous rating holds flat from 40 °C through 50 °C; above that it derates gradually to 56.7 A at 70 °C. That means in a hot panel or enclosure with limited airflow, the actual ampacity is lower than the nameplate 63 A.