Residual current circuit breaker 4-pole 10kA 63A 300mA type BS selective. Universal current sensitive residual current circuit breaker (FI, RCCB) according to DIN EN 61008-1 (VDE 0664-10), DIN EN 61008-2-1 (VDE 0664-11), DIN EN 61543 (VDE 0664-30) and DIN EN 62423 (VDE 0664-40). Short-term delayed and selective FI for protection against smooth DC and AC residual currents in the frequency range up to 2 kHz. To comply with the requirements of the installation standards DIN VDE 0100-410 and DIN VDE 0100-530. Suitable for the subsequent installation of additional equipment (installation without tools). Connection terminals with bi-connect terminals at the bottom, external blue test button, type B operating indicator, top and bottom DIN rail sliders for easy installation. Labeling option directly on the device.