MCCB for motor starter protection
The TM120M thermal-magnetic release provides the inverse-time overload curve and short-circuit magnetic trip, with a latching endurance of 15 000 operations, so it's rated for the switching cycles a motor branch sees over its service life.
Breaking capacity and coordination headroom
At 240 V the interrupting rating is 187 kA; at 415 V it's 121 kA; at 440 V it drops to 30 kA; and at 690 V it's 17 kA. The 690 V rating of 17 kA still covers most industrial motor branch circuits at that voltage class.
Above that it derates: 153.6 A at 55 °C, 150.4 A at 60 °C, 147.2 A at 65 °C, and 144 A at 70 °C.
Auxiliary and undervoltage release configuration
No communication function, no phase-failure detection, no ground-fault monitoring — it's a pure electromechanical protection device. The trip indicator on the front gives a visual flag after a fault, which saves a technician from having to guess whether the breaker tripped or was manually opened.