The built-in undervoltage release (UVR) means the breaker trips automatically when supply voltage drops below a threshold, a common requirement for safety circuits or machinery that must not restart unattended after a brownout.
Above 50 °C it steps down: 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. Maximum power loss is 98.5 W, so ventilation matters in a sealed cabinet.
Breaking capacity across voltage levels
Interrupting performance varies sharply with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V.