The Square D A1.39 (AG) Thermal Unit is a component designed for overcurrent protection in electrical systems, specifically for motor applications. Historically, Square D has been a leader in electrical distribution and control products since its founding in 1902. The company has continually evolved its offerings to meet the growing demands of electrical safety and efficiency. The A1.39 model falls under the Class 20 category, which is used in applications requiring short time-delay protection. Its designed current range is from 1.1 to 1.37 Amperes, making it suitable for motor protection applications that need precise thermal management. This thermal unit provides fail-safe protection by sensing the heat generated by the electrical flow. When a fault condition occurs, leading to excessive current, the unit trips, thereby preventing potential damage to motors and machinery. Key features of the A1.39 include: - Reliable thermal operation for accurate motor protection - Compatibility with a variety of motor controls - Easy integration with Square D's extensive range of electrical products, ensuring seamless operation in diverse industrial scenarios. Overall, the Square D A1.39 (AG) Thermal Unit is an essential component for maintaining the integrity and safety of industrial motor systems, offering both reliability and efficiency in protecting against overcurrent conditions.

Current Rating: 1.1 - 1.37A Class: 20