What this MCCB delivers in the panel
The SENTRON 3VA2340-5JP32-0KL0 is a 3-pole molded case circuit breaker rated for 400 A continuous current at 40 °C, with a maximum breaking capacity of 187 kA at 240 V. That 187 kA figure at 240 V tells you it handles high-fault scenarios common in industrial distribution — think transformer secondaries or bus feeds where the available fault current is substantial. At 415 V and 440 V it still clears 121 kA, and at 690 V it drops to 7.5 kA, which is typical for an MCCB of this frame size. The 400 A rating holds steady from 40 °C up to 50 °C, then derates linearly to 300 A at 70 °C. If your panel runs hot — say near a furnace line or in a non-climate-controlled enclosure — that derating curve is what determines real-world ampacity, not the nameplate number. It ships with a shunt trip release and a complement of auxiliary switches: two auxiliary switches plus one trip alarm and one electrical alarm switch. That means you get both status feedback and remote trip capability without adding external relay logic. The communication function is onboard, so it can talk to a BMS or PLC for power monitoring and remote control. The design is line protection — it's meant to sit at the feeder or sub-feed point, not downstream on a motor branch. The trip indicator and voltage trigger give clear visual and electrical fault indication, which cuts troubleshooting time when a line drops.
Mounting and integration
Dimensions: 248 mm high, 138 mm wide, 110 mm deep. The breaker accepts lug or busbar connections on both line and load sides. No undervoltage release is fitted from the factory, so if your safety circuit requires UVR, you'll need to add it as a field-installable accessory.