FI/LS for combined short-circuit protection and touch protection. The patented FI/LS switches from Siemens are an important component of the SENTRON protective devices for electrical installations, enabling combined personal, fire, and line protection in just one device. In addition to detecting fault currents, they also provide reliable protection against short circuits and overloads thanks to the integrated overcurrent protection device. The Siemens FI/LS switches, which combine residual current and circuit protection, are particularly characterized by:

1. Increased operational safety and system availability due to the separate disconnection of the affected circuit.
2. Whether sinusoidal alternating fault currents or smooth direct fault currents - Siemens offers the right type for all requirements as well as special versions.
3. Reliable safety during installation thanks to standard integrated gripping and touch protection.
4. Tool-free removal from the DIN rail or busbar system through comfortable slider hand operation.
5. Clearly visible switch position indicator.
6. The data matrix code on the front of the device provides quick and easy access to all information about the FI/LS switch.
7. Be norm-compliant protected: The FI/LS switches comply with the provisions of DIN VDE.
8. Optimal technology for your safety - only from Siemens.

Siemens offers a comprehensive portfolio of protection, switching, measurement, and monitoring devices, distribution systems, as well as switches and sockets for a safe, efficient electrical infrastructure in buildings and industry.