The Siemens SENTRON 3VA2340-5JQ32-0DL0 is a 3-pole molded case circuit breaker rated for 400 A continuous current at 40 °C, with an ETU560 electronic trip unit for line protection duty.
Full 400 A rating holds through 50 °C ambient; above that it steps down: 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C.
Auxiliaries and communication
The integrated summation ground-fault monitoring uses the L-conductor method. The basic switch assembly is order code 3VA2340-5JQ32-0AA0, and the auxiliary trip module is 3VA9608-0BB25 — useful if you need to order spare sub-assemblies separately.