The B-curve means it trips magnetically at 3 to 5 times rated current — so for a 4 A breaker, instantaneous trip occurs between 12 A and 20 A. The rated voltage is 230/400 V AC (single-phase / multi-phase), with a maximum of 440 V in multi-phase operation. For DC applications, the maximum rated voltage is 60 V. This is standard for DIN-rail mounted distribution board components; the enclosure provides the environmental seal.
The 5SL4104-6CC occupies 1 width unit (18 mm) on a DIN rail, with a depth of 76 mm and height of 90 mm. The installation depth is 70 mm. This single-module footprint is the standard for 1-pole MCBs, so it slots directly into any SENTRON distribution board or generic DIN-rail enclosure without crowding adjacent ways.