Breaking capacity is the headline number here: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and still 11.9 kA at 690 V. The TM240 release provides thermal protection for overloads and magnetic (instantaneous) protection for short circuits — a standard thermal-magnetic curve, no electronic adjustment. This is a fixed-release MCCB, not a trip-unit-swappable frame.
Maximum power loss is 17.3 W. In a sealed enclosure with multiple breakers, that heat adds to the internal temperature rise — the derating curve from 63 A at 40 °C down to 58 A at 70 °C accounts for this. Panel builders should factor the cumulative dissipation when sizing ventilation.