Integrator's spec recap
The Siemens 3VA2340-6KP32-0CL0 is a SENTRON molded case circuit breaker (MCCB) rated for 400 A continuous current at 40 °C, with a maximum interrupting capacity of 242 kA at 240 V and 187 kA at 415 V. It is a 3-pole, line-protection design with an integrated undervoltage release and communication function, making it suitable for main feeder or large subfeed applications in industrial switchgear.
What the ratings mean for your panel
The 400 A continuous rating holds flat from 40 °C to 50 °C, then derates to 375 A at 55 °C and 300 A at 70 °C — the thermal curve governs real-world ampacity in a closed cabinet. The 242 kA interrupting rating at 240 V confirms fault-clearing capability at the service entrance; at 690 V the rating drops to 7.5 kA, so verify the available fault current at your system voltage. Panel footprint: 248 mm height, 138 mm width, 110 mm depth. The 98.5 W maximum power loss at rated current must be factored into the enclosure thermal budget — adjacent devices may need additional spacing or forced ventilation.
Integration details
The breaker includes a trip indicator, two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ design), plus the undervoltage release. The communication function enables integration with higher-level monitoring systems — useful for a semiconductor fab's power distribution monitoring where a single particle event from an unmonitored fault can scrap a wafer lot. Storage temperature range is -40 °C to 80 °C; operating range is -25 °C to 70 °C. The supplied basic switch is order code 3VA2340-6KP32-0AA0 — confirm this matches your auxiliary contact block requirement before panel assembly.