It protects a single-phase final subcircuit against earth leakage and overload/short-circuit in one DIN-rail module. Rated 13 A at 30 °C ambient, it carries a 10 kA breaking capacity per EN 60898 and 20 kA per IEC 60947-2, so it can clear faults up to those levels without upstream coordination failure.
Temperature derating — the real continuous current
Inside a warm enclosure the available current drops: 12.48 A at 40 °C, 11.96 A at 50 °C, 11.31 A at 60 °C, and 10.01 A at 70 °C. If your panel runs at 50 °C ambient, size the downstream load for 11.96 A continuous, not the label 13 A.
Panel integration — DIN-rail fit and wiring
The IP20 rating applies once the distribution board is installed with conductors connected; it is not a standalone outdoor rating.
The higher 20 kA figure means this RCBO can be applied in industrial sub-distribution where fault currents reach 20 kA, provided the upstream device coordinates. The 4 kV rated surge voltage resistance (impulse withstand) covers typical mains transients in TN and TT systems.