Locking device handle lock + lock for circuit breaker T=70mm (1 set in a polybag) for 5SY, 5SP, 5TE8, 5SJ4...-.HG.. Locking device SENTRON 5ST3 as an additional component for residual current protective devices and circuit breakers. These additional components can be installed universally. They can be installed and connected easily and conveniently. Thanks to the standard touch protection, safety during installation is reliably guaranteed. Optimum technology for your safety - only from Siemens.