This is an MX shunt release for devices of the Compact NS 630/3200 series. Its rated voltage is 200 to 250 VDC or 200 to 250 VAC 50/60 Hz. It is an auxiliary device used for emergency stop or remote opening applications. This auxiliary device opens the circuit breaker when the control voltage Un rises above 70% of the rated voltage Un. It complies with the IEC 60947-2 standard. The Compact NS 630/3200 device can be equipped with an MX or 1 MN auxiliary equipment.