It delivers 187 kA interrupting capacity at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V — covering the full low-voltage fault spectrum from 240 V through 690 V systems.
Rated current and thermal performance
That simplifies panel thermal budgeting: the breaker delivers its full nameplate current even in a crowded cabinet running at 70 °C. Maximum power loss is 19.7 W, which keeps internal heating manageable and reduces the ventilation requirement in the enclosure.
At 690 V the 4.5 kA rating still covers most industrial systems but confirms this breaker is not intended for high-fault 690 V main service. The ETU320 electronic trip allows adjustable long-time, short-time, and instantaneous settings for selective coordination downstream.