What this MCCB carries and where it fits
The Siemens SENTRON 3VA2340-5KP32-0AE0 is a 3-pole molded case circuit breaker rated for 400 A continuous at 40 °C, with a maximum interrupting capacity of 187 kA at 240 V AC — that number drops to 121 kA at 415 V and 440 V, then to 75.6 kA at 500 V, and finally to 7.5 kA at 690 V. The 400 A rating holds flat from 40 °C through 50 °C; above that it derates to 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. That derating curve is worth checking if the breaker lives in a warm enclosure or next to other heat sources. The 138 mm width and 248 mm height put it in the standard SENTRON 3VA frame footprint — mounts into the same panel cutout as the rest of the 3VA line.
Integration notes for the panel
The 3VA2340-5KP32-0AE0 is designed for line protection — meaning it sits at the incoming feeder or main distribution point in a panel, protecting downstream branch circuits. It carries a communication function for integration with monitoring or control systems. The auxiliary switch design is 4 auxiliary switches HQ; no undervoltage release, no ground-fault monitoring, and no auxiliary release are fitted on this variant. The supplied basic switch is order code 3VA2340-5KP32-0AA0. Power loss maxes at 96 W — plan for that heat in the enclosure thermal budget. Operating range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.