Siemens SENTRON 3VA2340-5HN42-0DL0 — 400 A MCCB with Undervoltage Release
Its interrupting capacity reaches 187 kA at 240 V AC, 121 kA at 415/440 V, and 75.6 kA at 500 V — numbers that matter for fault-current coordination downstream of a large transformer or generator.
Ratings and Thermal Derating
That holds through 50 °C, then steps down: 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C.
Dimensions: 248 mm high, 184 mm wide, 110 mm deep. The basic switch variant is 3VA2340-5HN42-0AA0; this order code adds the UVR and auxiliary switch block pre-installed, saving panel-build labor.