RCBOs combine residual current and circuit breakers in a single device (RCCB/MCB combination). They protect people from fault currents and equipment from short circuits and overloads. The DRCBO 4 has a rated breaking capacity of 6 kA. In addition to a tripped indicator, it also features a labeling window. Type A switches are sensitive to both pulsed and alternating currents. This function is independent of the mains voltage. Switches with a tripping characteristic of C are optimized for circuits with high inrush or peak currents. Standard switches are designed for circuits with a rated voltage of 230 V or 400 V and a rated frequency of 50 Hz. Features include: pulsed and alternating current sensitivity, mains voltage-independent tripping, compact size for all rated currents, switching position indicator, separate indication of the tripping cause, terminal blocks with a wide clamping cross-section range on both connection sides, neutral conductor on the right, labeling window, mounting type: quick fastening on mounting rail, installation position is flexible, power supply is flexible. Applications: protection of circuits in residential and commercial buildings as well as industrial plants with TN-S, TT, and TN-C-S networks. In IT networks, RCCB/MCB switches can be used for disconnection in the event of a second earth fault. Use in systems with TN-C networks and for the protection of circuits where power electronic devices can cause smooth direct fault currents or fault currents with frequencies other than 50/60 Hz is excluded.