Breaking capacity hits 187 kA at 240 VAC, 121 kA at 415 VAC, and 75.6 kA at 440 VAC — numbers that tell you it handles high-fault utility feeds without cascading upstream. Current derating starts at 55 °C: 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, 45 A at 70 °C. Max power loss is 14.6 W — plan ventilation if you're packing several in a sealed enclosure.
Auxiliaries and release
The shunt trip lets a remote signal (e.g., E-stop, fire alarm, PLC output) open the breaker independently of the overload or short-circuit trip. The HQ alarm switch changes state when the breaker trips on fault — useful for feeding a status input back to a controller or annunciator panel. If you need UVR or GF protection, you're looking at a different 3VA variant or an add-on accessory.