The Siemens SENTRON 3VA2340-5KP32-0JA0 is a 3-pole molded case circuit breaker rated for 400 A continuous current across a 40 °C to 50 °C ambient range, with no derating required in that band. It carries a 187 kA interrupting capacity at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V — the SCCR headroom a site electrical engineer needs for selectivity studies and fault coordination downstream.
Thermal performance and derating
Above 55 °C the continuous rating steps down: 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. For a panel OEM wireman sizing gland plates and fill factor, the physical envelope is 248 mm high by 138 mm wide by 110 mm deep — a compact footprint for a 400 A frame that still leaves room for cable bending radius in the enclosure.
Protection and auxiliary functions
Designed for line protection with a built-in shunt trip release (STL) for remote tripping — no undervoltage release fitted, no auxiliary switch. The breaker includes a communication function and an other measurement function, meaning it can integrate into a monitored distribution system for a category sourcing buyer tracking BOM-level power data. Maximum power loss is 96 W, which factors into enclosure thermal calculations.