Siemens SENTRON 3VA2340-6HN32-0AA0 — 400 A MCCB with ETU350 Trip Unit
Breaking capacity is rated at 242 kA at 240 V AC, 187 kA at 415/440 V, 121 kA at 500 V, and 7.5 kA at 690 V — the 690 V figure governs the high-voltage end of the application envelope and is the limiting value for systems above 500 V.
Current Derating and Thermal Performance
Above that, derating applies: 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. Maximum power loss is 96 W at rated current — a factor for enclosure thermal calculations, particularly in sealed or high-density cabinets.
Dimensions are 248 mm height, 138 mm width, 110 mm depth — a standard 3-pole MCCB footprint for the 400 A frame class. Verify the mounting hole pattern and busbar spacing against the existing panel layout before ordering. The breaker does not include an undervoltage release, voltage trigger, or ground-fault monitoring module as standard — these are external accessories if required.