Three poles, line-protection design, and the integrated undervoltage release (UVR) mean it drops the load if control voltage is lost — a common requirement for emergency-stop circuits or undervoltage lockout schemes.
Interrupting capacity and coordination
At 240 V the breaker clears 242 kA — a figure that covers most secondary-side faults from large distribution transformers. At 415 V it still holds 187 kA, and at 690 V it drops to 3.7 kA, which is still adequate for most 690 V motor circuits in industrial plants. The 100 A frame with this interrupting class means you can use it as a main or feeder breaker in switchboards where selective coordination with downstream 18 kA or 25 kA MCCBs is required; the high withstand lets you set longer time delays without melting the main.
Auxiliary and alarm switching built in
The undervoltage release is factory-fitted, so if your spec calls for UVR on the MCCB, this order code saves the separate kit and wiring step.
The depth of 86 mm (3.39 in) leaves room for rear-connected busbars or cable lugs in a 200 mm deep cabinet.