The TM240 thermal-magnetic release handles overloads and short-circuits; the interrupting capacity reaches 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that define where this breaker can be applied without cascading upstream.
At 250 A continuous, this MCCB is sized for large feeders or main disconnects in distribution panels. The interrupting ratings across voltage levels tell you the maximum fault current it can safely clear: 121 kA at 240 V suits high-fault industrial services; at 415 V it still handles 75.6 kA, and at 690 V it drops to 11.9 kA — so for a 690 V system, verify your available fault current stays under that threshold. Thermal derating is published: it holds 250 A up to 50 °C, then steps down to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C.