The Siemens SENTRON 3VA2340-6KP32-0KA0 is a 3-pole molded case circuit breaker rated for 400 A continuous current, designed for line protection in distribution panels and motor control centers. It carries a shunt trip release for remote emergency disconnect and supports communication functions for integration into higher-level monitoring systems.
Interrupting capacity and selectivity
This MCCB delivers 242 kA interrupting capacity at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 7.5 kA at 690 V. The steep drop at 690 V means this frame is optimized for 480 V and 600 V class systems — at 690 V the 7.5 kA rating limits its use to low-fault locations or downstream of a current-limiting device. Full continuous current of 400 A is maintained from 40 °C through 50 °C ambient. Above that, derate linearly: 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. In a hot panel near the top of a switchboard, factor the actual ambient — the 400 A nameplate holds only up to 50 °C.
Dimensions and panel fit
The breaker measures 248 mm high, 138 mm wide, and 110 mm deep. The 138 mm width is the standard 3-pole MCCB footprint for this frame size — verify the mounting hole pattern against the existing panel backplate before ordering, especially if replacing a different manufacturer's unit.
Built-in release and auxiliary options
Factory-fitted with a shunt trip release for remote tripping via a control signal. No undervoltage release, no ground-fault monitoring, and no auxiliary switch are included on this variant. Communication and other measurement functions are available, indicating the electronic trip unit supports data export for energy management or SCADA polling.