RCBO 4P type A residual current circuit breaker, 10 kA, C-20 A, 30 mA, conforms to DIN EN 61009-1 (VDE 0664-20). For 400 V three-phase circuits, including compact housing with blue test button and residual current display. Enables simple removal from the phase rail network and the subsequent installation of additional devices. Inscription possible directly on the device.