Thermal derating and continuous current
Above that, the breaker derates: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. For a panel with internal temperature rise above 50 °C, size the load accordingly — the full 250 A is only available below that threshold.
Verify enclosure depth against the 86 mm plus wiring clearance before committing the backplate layout.
Trip unit, auxiliaries, and communication
Two HQ auxiliary switches (3VA9608-0BB11) are integrated for status feedback. An undervoltage release (UVR) is fitted — the basic switch is order code 3VA2225-5JP32-0AA0, and the auxiliary trip module is 3VA9608-0BB11. Communication function is present, enabling integration with higher-level monitoring systems.
Environmental and electrical ratings
The breaker does not include a voltage trip, phase failure detection, or ground fault monitoring.