It combines a 40 A thermal-magnetic MCB (B curve, tripping between 3 and 5 times In) with integrated 300 mA Type AC earth-leakage detection in a single 1P+N module. Rated breaking capacity is 6 kA Icn at 230 V AC, 50/60 Hz, per EN/IEC 61009. That covers the majority of residential and light commercial final circuits in most European installations. The 300 mA sensitivity is a common earth-leakage threshold for protection against fire risk rather than direct personal shock — 30 mA units are used for personnel protection.
Occupies 4 modules of 9 mm pitch — 36 mm total width. Neutral is on the left, phase on the right. The toggle switch provides local ON/OFF indication and manual control.
Designed and certified to EN/IEC 61009-1 and EN/IEC 61009-2-1. Pollution degree 3, overvoltage category III, tropicalisation class 2, limitation class 3 — all per EN 61009. Rated insulation voltage 400 V AC. Operating altitude up to 2000 m, ambient storage range -40 to +60 °C, relative humidity 95 % at 55 °C. Electrical durability 10,000 cycles, mechanical durability 20,000 cycles.