It clips onto DIN rail in a distribution board and protects outgoing circuits. The integrated 30 mA earth-leakage protection covers personnel shock risk, and the 6 kA breaking capacity (Icn/Icu at 380–415 V AC, 50 Hz) meets the standard for most commercial and light industrial sub-distribution boards.
The C curve means the magnetic release operates at 5–10 times In — so for a 20 A device, instantaneous trip starts between 100 A and 200 A. The 30 mA earth leakage sensitivity is the standard for personnel protection in IEC 60364 installations; it will trip on any ground fault above that threshold. The 6 kA breaking capacity (Icn per EN/IEC 61009-2-1, Icu per EN/IEC 60947-2) tells you the device can safely interrupt a fault current up to 6 kA at the service voltage — adequate for most final circuits fed from a 100–200 A distribution board with a transformer of 250–500 kVA.
Clip-on mounting to DIN rail (EN 60715). The 4-pole module occupies 8 x 9 mm pitches — 72 mm width on the rail. Tunnel-type terminals accept 1–35 mm² rigid or 1–25 mm² flexible cable; strip length 12 mm, tighten to 2 N·m. The white housing carries local signalling (ON, OFF, fault trip) visible through the transparent toggle cover. IP40 in a distribution enclosure, IP20 with terminals exposed.