Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415/440 V — enough to ride through high-fault scenarios without cascading upstream.
That means a panel at 55 °C still carries 375 A — useful for crowded enclosures without upsizing the frame. The minimum interrupting rating is 600 A, so the breaker clears low-magnitude faults reliably, not just bolted shorts. Interrupting capacity drops sharply above 500 V — 75.6 kA at 500 V, then 7.5 kA at 690 V. Max power loss is 98.5 W per pole.
Built-in communication and auxiliary hardware
This variant includes a communication function and two HQ auxiliary switches for status feedback. The undervoltage release is installed from the factory. The basic switch variant is 3VA2340-5JQ42-0AA0, which lacks the UVR and communication module.