The Siemens SENTRON 3VA2340-5KP32-0AH0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current of 400 A at 40 °C, with an ETU850 electronic trip unit configured for line protection. It carries a rated insulation voltage of 800 V and delivers interrupting capacities of 187 kA at 240 V, 121 kA at 415 V, 121 kA at 440 V, 75.6 kA at 500 V, and 17 kA at 690 V — so it can clear high-fault currents across a range of common industrial voltage levels without upstream coordination issues. The 400 A rating holds flat through 50 °C, then derates to 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C; that thermal curve matters when the breaker lives in a warm enclosure or near other heat sources.
It mounts into a panel or enclosure with the standard SENTRON 3VA footprint — the 138 mm width is a 3-pole frame size that fits the same bus-bar and mounting-hole pattern as other 3VA2 breakers. Front-side IP40 protection means it is suitable for general indoor panel use but not washdown environments.
What the ETU850 trip unit gives you
It includes a trip indicator (mechanical flag) for local fault identification. There is no undervoltage release, no phase-failure detection, and no ground-fault monitoring built into this variant; those functions would require an external module or a different order code.