The ETU310M electronic overcurrent release provides adjustable protection curves, and the breaker carries a latching endurance of 20,000 operations.
The 75 W maximum power loss means you need to account for heat dissipation in a sealed cabinet — plan for ventilation or derating if the ambient inside the panel exceeds 50 °C. The continuous current rating holds at 63 A up to 50 °C ambient; above that it derates to 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C. If your panel runs hot, the effective ampacity drops — size your load accordingly.