This is a MN undervoltage release for Compact NSX, PowerPact Multistandard and EasyPact CVS circuit breakers.Its rated voltage is 220 to 240 VAC 50/60 Hz, or 208 to 277 VAC 60 Hz.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.This undervoltage release is a UL Listed/CSA Certified circuit breaker accessory.Compact NSX, PowerPact Multistandard and EasyPact CVS can be equipped with either 1 MX or 1 MN auxiliary.