The Carling Technologies CA1-X0-18-268-A21-MJ Circuit Breaker is a high-quality main breaker designed for AC current with a maximum amperage of 100A. This on/off switch-style circuit breaker, made by Carling Technologies in the United States, is perfect for electrical equipment and supplies in various industrial settings. With its single pole operation, this circuit breaker efficiently protects electrical circuits from overloading while providing reliable control for your electrical systems.