Breaking capacity and trip curve
The 5SJ4204-7HG41 is a 2-pole miniature circuit breaker from the Siemens SENTRON 5SJ4 family, rated 10 kA breaking capacity per EN 60898 and 15 kA per IEC 60947-2 at 400 V AC. The C characteristic (tripping between 5× and 10× In) is the standard choice for general-purpose branch circuits feeding motor starters, contactor coils, and control transformers where moderate inrush is expected — it avoids nuisance tripping on the magnetising peak while still clearing a hard fault.
Environmental and compliance rating
Rated for ambient temperatures from -40 °C to 75 °C with up to 95 % humidity. The housing is halogen-free and silicon-free, which matters in clean-room or semiconductor fab environments where outgassing can contaminate optics or process gases. Overvoltage category III and pollution degree 3 — suitable for fixed installations inside industrial panels where the breaker sees transient overvoltages from the mains and operates in a dusty or conductive-contaminant environment.