This Supplementary Protector is designed for use in AC applications, compliant with UL1077 standards. It features a single pole configuration and is rated for a current of 0.5A at a voltage of 400V. The device adheres to a trip characteristic of Curve C, which is suitable for protecting against overloads and short circuits.With a compact width of 18mm and a depth of 70mm, this circuit breaker is ideal for installation in space-constrained environments. It has a rated short-circuit breaking capacity of 10 kA at 230V and 400V, ensuring reliable performance under fault conditions. The device is constructed to meet pollution degree 3 and over voltage category 3 requirements, providing enhanced safety for industrial applications.Notably, the protector offers a degree of protection classified as IP20, indicating suitability for indoor use. The operational temperature range extends from -40 °C, making it adaptable to various environmental conditions. This unit allows for connection of solid-core or multi-wired conductors with a cross-section of 0.75 mm², ensuring flexibility in wiring configurations.For further compliance, it carries UL File E116386 in Volume 1, Section 2, and is designed for easy integration into existing electrical systems.