Terminal cover 1-pole for miniature circuit breaker Terminal cover 1-pole for miniature circuit breaker SENTRON 5ST3 as an additional component for residual current protective devices and miniature circuit breakers.These additional components can be mounted universally. They can be installed and connected easily and conveniently. Thanks to the standard touch protection, safety during installation is reliably guaranteed.Optimal technology for your safety - only from Siemens.