The ABB 2CSF204101R3630 is a 63 A four-pole residual current circuit breaker designed for 50 Hz AC distribution boards. The IP2X enclosure means it is finger-safe when installed in a panel but not intended for wet environments.
Mounts on a DIN rail; occupies a standard 4-module width (70 mm). Depth is 69 mm, so it clears most domestic enclosure back-walls. Verify busbar routing and gland plate clearance before panel wiring. 50 Hz only – do not install on variable-frequency supplies where DC leakage may saturate the RCD core.