The FUJI ELECTRIC 4NK0AN is a robust thermal overload relay engineered to provide comprehensive motor protection. Its key features include an adjustable ampere range allowing for customization to specific motor requirements, a built-in heater ensuring accurate temperature sensing, and an alarm contact for proactive monitoring of motor conditions. The relay is designed for use with various contactor frames and offers open-phase protection. It's ideal for applications requiring reliable motor protection and safety, commonly found in industrial automation, HVAC systems, and power distribution.