This is a MN undervoltage release for Compact NS 100 to Compact NS 630 devices. Its rated voltage is 525VAC 50 Hz or 600VAC 60Hz. 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 NS 100 to Compact NS 630 device can be equipped with 1 MX or 1 MN auxiliary.