The integrated earth-leakage protection trips at 300 mA sensitivity, which is a common setting for final subcircuits where a 30 mA unit would cause nuisance tripping on longer cable runs or equipment with natural leakage. Breaking capacity is 4500 A Icn at 230 V AC, 50/60 Hz, conforming to EN/IEC 61009-2-1, which covers most residential and light commercial distribution boards in the UK and European markets. Limitation class 3 (energy-limiting) means it restricts let-through energy in a fault — useful for downstream coordination with less robust wiring or loads.
Tunnel terminals accept 1–16 mm² rigid or 1–10 mm² flexible cable; strip length 14 mm, tightening torque 2 N·m. IP20 on the body, IP40 inside the modular enclosure. The toggle provides local ON/OFF and fault indication. This is an outgoer device in the distribution board — not a main switch.