This is a MN undervoltage release for Compact NS80H-MA and Compact NSC100N devices. Its rated voltage is 380VAC to 415VAC 50Hz. It is an auxiliary used for emergency off or remote opening applications. This auxiliary opens the circuit breaker when the control voltage drops to a value below 35% of its rated voltage Un. It complies with IEC 60947-2 standard. Compact NS80H-MA and Compact NSC100N devices can be equipped with either 1 MX or 1 MN auxiliary.