Its 10 mA rated residual tripping current makes it suitable for circuits requiring enhanced protection against electric shock — think wet areas or circuits feeding portable equipment where a standard 30 mA device may not clear fast enough. The 16 A rated current at 40 °C is the continuous load it can carry in a typical panel environment; derate to 11.2 A at 70 °C if the enclosure runs hot.
The 70 mm depth fits flush in most distribution boards; IP20 applies only when the board is installed and conductors are connected, so it's not for open-panel or washdown areas. Finger- and back-of-hand safe protection against electric shock means the terminals are touch-safe per the standard — no extra shrouding needed during commissioning.