Residual current circuit breakers (RCCB) disconnect the power supply when dangerously high fault currents occur, thus protecting people, animals, and equipment. DFS 2 are two-pole residual current circuit breakers for single-phase networks. In standard design, these compact devices are narrow at two division units. They are available with various fault current types and designs with rated currents up to 125 A. The large double-deck terminals can accommodate large conductor cross-sections. The triggered position of the multifunction switch knob facilitates troubleshooting. The free labeling software assists with marking. Type A switches are sensitive to pulsating and alternating currents. This function is independent of the mains voltage. Devices in standard design are intended for monitoring circuits with a rated voltage of 230 V/400 V and a rated frequency of 50 Hz. Features: - independent tripping from mains and auxiliary voltage - sensitive to alternating and pulsating currents.