Its breaking capacity is voltage-dependent: 121 kA at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V. That 121 kA figure at 240 V covers high-fault utility feeds or transformer secondaries where available fault current exceeds typical distribution gear; the 11.9 kA at 690 V still clears motor-drive bus faults in most industrial installations.
Thermal derating — where the real ampacity lands
Above that, the TM240 release derates: 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C. For a panel that runs at 55 °C ambient — common in sealed enclosures with solar or drive heat — the usable continuous current drops to 243 A.
The breaker ships with 2 auxiliary switches HP (high-performance) built in, which provide independent status feedback for PLC or safety relay monitoring.