Panel fit and interrupting capacity
The Siemens 5SJ4211-7HG41 is a 2-pole C-curve miniature circuit breaker from the SENTRON 5SJ4 family, sized at 2 modular width units (36 mm) for standard DIN-rail mounting. Its C characteristic handles moderate inrush from motor and lighting loads without nuisance tripping, while the 10 kA breaking capacity per EN 60898 covers most commercial and light industrial panelboards. The higher 15 kA rating per IEC 60947-2 applies when the breaker is installed in an industrial distribution board with higher prospective fault current — that's the number to check against your available fault current study. Rated for 400 V AC and 60 V DC circuits, with an insulation voltage (Ui) of 440 V AC. Pollution degree 3 and overvoltage category 3 mean it's rated for the conductive-dust and transient environment typical of control panels near production machinery.
Mounting and wiring details
Sealable design allows the installer to lock the handle position with a padlock for lockout/tagout. IP20 with connected conductors; IP40 in the handle range. Halogen-free and silicon-free construction — relevant for clean-room or semiconductor-adjacent installs where outgassing contaminates processes.
Environmental and compliance
Rated for ambient temperatures from -40 °C to 75 °C, with max 95% humidity. Vibration resistance tested at 50 m/s² over 25 to 150 Hz and 60 m/s² at 35 Hz for 4 seconds — sufficient for machine-mounted panels on pumps or compressors. Suitability for operation listed as mechanical engineering / industry.