NZM1-XU380-440AC Eaton Molded Case Circuit Breaker

The NZM1-XU380-440AC is an Eaton undervoltage release associated with Series NZM molded case circuit breakers. The stated 380-440 V rating defines the voltage range for which the unit is specified. Its NZM1 designation identifies the breaker frame as J-K, and the XU portion denotes the undervoltage-release configuration. This release is intended for installation in a compatible NZM1 breaker within the J-K frame, where undervoltage release operation is required. The AC suffix identifies the alternating-current version of the model. Together, the model number and Series NZM designation provide the information needed to match the release to the corresponding molded case circuit breaker frame, series, and voltage range.