The breaking capacity of 40 kA Icu at 220/240 V AC and 36 kA Icu at 380/400 V AC (both per EN/IEC 60947-2) tells you the maximum fault current it can safely interrupt at those voltages. The thermal-magnetic trip provides overload protection (thermal element) and short-circuit protection (magnetic element), with fixed long-time pickup at 1 In — no field adjustment on the trip curve.
This breaker mounts fixed to a backplate — no DIN-rail clip, so plan for a drilled or tapped mounting surface. Connection pitch is 45 mm, neutral position is left, and the toggle control is front-accessible. IP40 protection keeps dust out but doesn't seal against moisture — keep it indoors or in a weatherproof cabinet.
