EATON Undervoltage Release for NZM2/3, 208 V AC/DC, NZM2/3-XU208-2 (259499)

The EATON NZM2/3-XU208-2 undervoltage release is engineered for automatic tripping of Eaton NZM2 and NZM3 circuit breakers when the control voltage drops below a safe threshold. Unlike generic accessories, it is a plug-in internal module that integrates directly into the breaker, ensuring reliable protection for safety interlocks, emergency stop circuits, and remote tripping applications. Its 208 V AC/DC rated control voltage and wide operating range make it suitable for diverse industrial control systems.

Highlights

• Compatible with Eaton NZM2 and NZM3 series circuit breakers
• Rated control voltage: 208 V AC/DC
• Trips breaker automatically when voltage falls below 0.35–0.7 Un
• Internal plug-in mounting for seamless integration
• Screw terminal connections for secure wiring

In daily use

Installed inside the circuit breaker, the undervoltage release continuously monitors the control voltage. If the voltage drops below the release threshold, it triggers the breaker to open, preventing equipment damage or unsafe operation. Once voltage is restored and the breaker is manually reset, the release automatically resets, ready for the next cycle. This makes it ideal for machinery safety circuits, conveyor systems, and any application where power loss must lead to a controlled shutdown.

Full specifications

• Accessory type: Undervoltage release
• Compatibility: Eaton NZM2, NZM3 series circuit breakers
• Rated control voltage (Un): 208 V AC/DC
• Operating voltage range: 0.7–1.1 Un
• Release threshold: 0.35–0.7 Un
• Function: Automatic tripping of circuit breaker upon undervoltage
• Mounting type: Internal, plug-in
• Connection type: Screw terminals
• Power consumption (operating): 3.5 VA / 3.5 W (AC/DC)
• Operating temperature range: -25°C to +70°C
• Storage temperature range: -40°C to +80°C
• Reset mechanism: Automatic reset when voltage returns (after manual breaker reset)
• Product series: NZM2/3

Final note

A dependable undervoltage release that enhances the safety and functionality of your Eaton NZM circuit breakers, ensuring prompt disconnection during voltage anomalies.