What this 400 A SENTRON MCCB delivers
The Siemens SENTRON 3VA2340-6KP32-0DA0 is a 3-pole molded case circuit breaker rated for 400 A continuous current with no derating up to 50 °C — above that it drops to 375 A at 55 °C and 300 A at 70 °C, so if the panel ambient runs hot, size for the temperature-adjusted figure, not the nameplate. Breaking capacity is 242 kA at 240 VAC, 187 kA at 415/440 V, 121 kA at 500 V, and 7.5 kA at 690 V — that 690 V number is low enough that on a 690 V line you need to verify the fault current at the point of installation doesn't exceed it. An undervoltage release (UVR) is built in, and the breaker supports communication functions — useful for remote trip indication or integration into a power-management system.
Panel fit and mechanical constraints
The case measures 248 mm high × 138 mm wide × 110 mm deep — check the enclosure depth against the 110 mm plus wiring space before committing the panel layout. The basic switch variant is 3VA2340-6KP32-0AA0; this order code adds the undervoltage release and communication function on top of that base.