Its 25 A rated continuous current (Iu) holds flat from 40 °C to 50 °C, then derates gradually to 22.5 A at 70 °C — so in a warm enclosure the breaker still carries the full 25 A up to 50 °C, which covers most North American and European panel ambient conditions without a derate step. Breaking capacity is the headline number for this class: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. At 415 V — common in European industrial panels — 75.6 kA SCCR means it sits comfortably downstream of a transformer or main breaker with a high available fault current. The 690 V rating (11.9 kA) is lower but still covers most motor-circuit fault levels at that voltage.
Panel integration and deployment
The undervoltage release coil needs a control voltage; verify polarity and suppression per the panel wiring diagram before energizing.