Residual current circuit breaker 4P 6kA B-10A 30mA Type A QC/QB. Residual current circuit breaker in accordance with DIN EN 61009-1 (VDE 0664-20) with overload protection of the neutral conductor through a 4-pole circuit breaker for 400 V three-phase circuits and a residual current protection circuit in a compact housing. QuickConnect spring terminal in accordance with DIN EN 60898-1 (VDE 0641-11), on the outgoing and incoming circuits, blue test button and residual current display. Easy individual removal from the phase busbar assembly using top-hat rail sliders at the top and bottom. Suitable for the subsequent installation of additional equipment. Labeling option directly on the device.