This pre-wired MX shunt trip is used on Compact NSXm and PowerPact B devices.This auxiliary is used for emergency off or failsafe remote opening applications.It is a one click spring type auxiliary for quick and easy installation, visible from the front face of the device.This MX auxiliary has a 110/130 VAC 50/60Hz or 125VDC rated voltage.It trips the circuit breaker when the control voltage rises above 70% of its rated value.It complies with IEC 60947-2 standard.Compact NSXm and PowerPact B embed either 1 MN or 1 MX coil.