It carries a breaking capacity of 330 kA at 240 V, 242 kA at 415 V and 440 V, and 52.5 kA at 690 V — figures that cover most industrial fault-current scenarios from low-voltage distribution down to motor branch circuits.
The 500 A rating holds flat from 40 °C through 50 °C, then derates gradually to 480 A at 70 °C. That thermal curve means the breaker can sit in a warm enclosure without losing headroom until the ambient climbs above 55 °C — useful for a panel near a furnace line or in a non-conditioned electrical room. The ETU350M release is a microprocessor-based overcurrent trip designed for motor protection: it includes phase-failure detection and an adjustable time-current curve that coordinates with motor-start inrush without nuisance tripping.
Integration and footprint
The IP40 front protection means it is splash-safe from the front but not sealed; install it in a panel with a door or cover for environments with dust or dripping water. Auxiliary contacts are included as 2 HQ switches, and the breaker ships with an undervoltage release (3VA9608-0BB25) pre-installed. No communication module or ground-fault monitoring is fitted on this variant — those are separate order options if the application needs them.