FI residual current circuit breaker, 2-pole, Type F, time-delayed, In: 25 A, 30 mA, Un AC: 230 V. The residual current circuit breaker is the protective device for touch protection. Siemens' patented residual current protective devices are an important component of the SENTRON protection systems for electrical installations, as they prevent life-threatening electrical accidents by safely disconnecting dangerous fault currents to ground. Electrically ignited fires can be prevented right from the start. Whether through direct contact with live parts or through indirect contact with operating equipment, protection is primarily achieved through rapid disconnection. The Siemens FI circuit breakers 5SV stand out for: 1. Comprehensive protection for people and property against electric shock 2. Whether sinusoidal alternating fault currents or smooth direct fault currents - Siemens offers the right type for all requirements, as well as special versions.