The SENTRON 3VA2340-7HN32-0AF0 is a 3-pole molded case circuit breaker rated for 400 A continuous current at 40 °C, with a maximum interrupting capacity of 330 kA at 240 V AC. Per the datasheet, the continuous rating holds at 400 A through 50 °C, then derates to 385 A at 55 °C and 340 A at 70 °C — so the thermal curve is what governs real-world panel loading, not the nameplate number. The breaking capacity drops to 242 kA at 415 V and 7.5 kA at 690 V, which means this breaker is sized for high-fault low-voltage distribution, not 690 V motor circuits. It carries a line protection design, meaning the trip curve and thermal-magnetic response are tuned for feeder and main breaker duty rather than motor or generator protection.
The basic switch variant is 3VA2340-7HN32-0AA0, which is the thermal-magnetic core without the electronic trip unit or communications. This -0AF0 suffix adds the electronic trip unit with adjustable protections, so the panel wiring and bus bar connections are identical between the two — the swap is in the trip logic, not the mounting.