RCBOs combine residual current and circuit protection switches in one device (RCCB/MCB combination). They protect people from fault currents and installations from short circuits and overloads. The DRCBO 3 series switches operate independently of the mains voltage and are characterized by a high rated breaking capacity. Separate indicators provide a quick overview of the current operating status. DRCBO 3 switches are easy to install and remove. Type A switches are sensitive to pulsating and alternating currents. This function is independent of the mains voltage. Switches with a type C tripping characteristic 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: auxiliary voltage-independent tripping, sensitivity to alternating and pulsating direct fault currents (Type A), compact size for all rated currents, high short-circuit resistance, green-red contact position indicator, fault current tripping indicator, terminal blocks with back protection and a wide terminal cross-section range for rail and wiring connections on both connection sides, neutral conductor on the right, tristable latch slider for easy installation and removal, mounting type: quick fastening on mounting rails, installation position flexible, power supply flexible. Application areas: 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 provided 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 electronics equipment may cause smooth direct fault currents or fault currents with frequencies other than 50/60 Hz is excluded.