The 5SJ6225-6RC: The 6kA breaking capacity at the rated voltage covers most commercial and light industrial panel applications where the prospective fault current stays under that threshold. The B characteristic (trips between 3 and 5 times rated current) is the standard choice for resistive and general-purpose loads — lighting circuits, small heater banks, control transformers — where inrush isn't a concern.
DIN-rail fit and panel integration
Snaps onto standard 35 mm DIN rail per EN 60715. Two-pole width means it occupies two modular spaces (36 mm) on the rail — factor that into your enclosure fill count. The Retail line uses the same footprint as the broader 5SJ series, so no surprises on the gland plate layout if you're swapping from another Siemens MCB.