The TM240 thermal-magnetic release handles overload and short-circuit trips; the thermal element tracks load current, the magnetic element clears fast on high faults. Breaking capacity is the headline number here: 187 kA at 240 V AC, dropping to 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V and 690 V. At 690 V the 17 kA figure still covers most industrial motor branch circuits.
At 55 °C it derates to 62 A, at 60 °C to 61 A, at 65 °C to 60 A, and at 70 °C to 58 A. Maximum power loss is 17.3 W per pole — worth accounting for in a tightly packed panel with limited airflow.
Auxiliary switch configuration
The auxiliary signals the open/closed state of the breaker; the trip alarm signals that the breaker tripped on fault, not manual operation.