Undervoltage release Acti 9 MNx. Operating voltage (Ue) 400V AC. Activation of associated devices by opening the control circuit. Voltage drops in the supply do not trigger associated devices. Control by pushbutton with locking enables the protected circuit to be arranged in safety applications. Fail-safe emergency stop function. The undervoltage release MNx complies with the following standards - IEC/EN 60947-1 and EN 60947-2.