The Siemens circuit breaker 3VA1 IEC frame, ATAM is molded-case circuit breaker for system protection. As an important element of SENTRON protective components for industrial and infrastructure applications, the 3VA molded-case circuit breakers from Siemens provide effective plant, starter and motor protection thanks to reliable shutdown in the event of an overload or short circuit. The 3VA molded-case circuit breakers set new standards in flexibility and the variety of modular accessories available. Standardized accessories for several sizes across all series of the 3VA1 and 3VA2 molded-case circuit breakers. Fixed and Plug-in-installation possible. Modular and easy-to-fit internal accessories with wide range of functions. Suitable for AC&DC applications. Compact design.