The Siemens box terminal 3 units accessory used for 3VA2 160. It has connection technology for 3VA moulded-case circuit breakers. The connection technology of the 3VA moulded case circuit breakers is designed to support uncomplicated and convenient commissioning of the 3VA moulded case circuit breakers and to meet all installation requirements. It offers a comprehensive portfolio of protection, switching, measuring and monitoring devices, distribution systems as well as switches and sockets for safe and efficient electrical infrastructure in buildings and industry.