400 A MCCB with high interrupting capacity for line protection
The Siemens SENTRON 3VA2340-6HL32-0CL0 is a 3-pole molded case circuit breaker rated for 400 A continuous current, designed for line protection in distribution panels. Its interrupting capacity hits 242 kA at 240 V and 187 kA at 415 V — enough to handle high-fault scenarios without cascading upstream. The 400 A rating holds flat from 40 °C to 50 °C, then derates to 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C, so plan your enclosure ventilation if the ambient climbs above 50 °C.
Panel fit and auxiliary configuration
Dimensions are 110 mm deep, 138 mm wide, 248 mm tall — standard MCCB footprint that fits most DIN-rail or panel-mount enclosures without surprises. Ships with an undervoltage release (UVR) and a full auxiliary switch block: 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch HQ. That covers remote status and trip indication without adding external relays. Maximum power loss is 98.5 W, so factor that into your thermal budget if the panel is tightly packed.