Accessories for 3KC3, 3KC6 auxiliary switches include 3 changeover contacts: 1 changeover contact for position I, O, II for 40-160A with connected common contacts includes 1 piece including screw set Comprehensive accessories for increased flexibility. From connecting bridges and auxiliary switches to various drives, fourth poles or contact covers: With a wide range of accessories, the switch disconnectors and transfer switches can be used for different requirements and upgraded at any time. www.siemens.de/schaltgeraete. Siemens offers a comprehensive portfolio of protection, switching, measuring and monitoring devices, distribution systems as well as switches and sockets for safe, efficient electrical infrastructure in buildings and industry.