This MN undervoltage release is used for ComPact NSXm and PowerPact B devices. This auxiliary device is used for emergency stop or fail-safe remote trip applications. It is a one-click auxiliary device for quick and easy mounting, visible from the front of the device. This MN auxiliary device has a rated voltage of 440/480 VAC 60 Hz. It trips the circuit breaker when the control voltage falls below 35% of the rated value. It complies with IEC 60947-2 standard. ComPact NSXm and PowerPact B have a coil of 1 MN or 1 MX.