Heavy-duty 3-pole circuit breaker rated at 25A, serving as the main power switch for refrigeration units in intermodal reefer containers. Engineered to protect electric motors, compressors, and overall control systems from short circuits and overload conditions. This high-reliability circuit breaker is built to withstand rigorous transport demands, including heavy vibrations, high humidity, and extreme temperature cycling, ensuring immediate interruption in case of electrical faults and maximizing cargo safety.