Remote operator 5ST3 Power 12-30V AC / 12-48V DC, 2TE, for LS, FI, FI blocks, FI/LS, on/off switch Remote operator Power SENTRON 5ST3 as an additional component for residual current devices and circuit breakers. These additional components can be installed universally. They are easy and convenient to install and connect. Thanks to the standard touch protection, safety during installation is reliably guaranteed. Optimum technology for your safety - only from Siemens.