It protects a 1P+N circuit, rated 20 A at 50 °C with a 30 mA earth-leakage sensitivity and a C curve for magnetic trip.
The 20 A thermal-magnetic trip is the continuous current at 50 °C — no derating needed at that ambient. The 30 mA earth-leakage sensitivity provides personal protection against direct contact; it's the standard threshold for socket-outlet circuits in most IEC 60364 installations. Limitation class 3 means it limits let-through energy, reducing stress on downstream equipment.
