EATON Magnum DS low voltage power circuit breakers offer the highest ANSI interrupting and withstand ratings in the industry in the smallest physical size and are the most easily maintained ANSI breakers on the market. Magnum SB are insulated case power circuit breakers designed for the performance and economic requirements of UL 891. Both are ideal for switchgear and switchboards, providing excellent safety, flexibility, and a high level of performance. Magnum breakers for IEC and DC applications are also available.