RCBOs combine residual current and circuit breakers in one device (FI/LS combination). They protect people from residual currents and systems from short circuits and overloads. The FI/LS combinations FIB/FIC have a rated switching capacity of 6 kA. The tripped indicator and label window make it easier to see what is going on. Type A switches are sensitive to pulse and alternating current. This function is independent of the mains voltage. Switches with tripping characteristic B are the standard protection for light and socket circuits. Standard switches are designed for circuits with a rated voltage of 230 V or 400 V and a rated frequency of 50 Hz. Properties: tripping independent of mains voltage, small size for all rated currents, high short-circuit strength, switch position indicator, separate indication of the reason for the fault, clamping yoke terminals with a wide clamping cross-section range on both connection sides, neutral conductor on the right, high electromagnetic compatibility (interference immunity for industrial applications) Mounting type: quick attachment to mounting rail, installation position as desired, feed-in as desired, areas of application: protection of circuits in residential and commercial buildings as well as industrial plants with TN-S, TT and TN-CS networks. In IT networks, FI/LS switches can be provided for switching off in the event of a second earth fault. Use in systems with TN-C networks and for protecting circuits in which power electronics equipment can cause smooth DC fault currents or fault currents with frequencies other than 50/60 Hz is excluded.