The 30 mA Type A residual-current element catches sinusoidal AC faults plus pulsating DC faults (common from rectified loads like VFDs, LED drivers, or switching power supplies).
Thermal derating — the real-world current
At 40 °C it derates to 9.6 A, at 50 °C to 9.1 A, and at 60 °C to 8.6 A.
The 5SU1324-7FR10 occupies 2 MW (36 mm) on a DIN rail, with a depth of 72 mm and height of 85 mm. Installation depth is 70 mm — account for that behind the gland plate. Touch protection is built in (finger-safe terminals). Supply can enter from top or bottom, which simplifies busbar routing in a crowded enclosure.