It's the kind of device you'd find on a DIN rail in a distribution board, protecting a final subcircuit against both earth faults and overloads or short circuits. The Type A residual current detection means it catches pulsating DC fault currents on top of standard AC sine-wave faults, so it's suited for circuits with electronics like rectifiers or variable-speed drives.
The thermal derating is honest and published: at 30 °C ambient it carries the full 13 A; at 40 °C it's 12.2 A; at 50 °C it's 11.2 A; at 60 °C it's 10.3 A.
Its depth is 72 mm, with 70 mm of installation depth needed behind the panel face.