Rated for 400 V AC single-phase (250 V line-to-neutral) and up to 72 V DC, so it handles most branch circuits in a DIN-rail enclosure. The 1-module width (18 mm) and 76 mm depth fit the standard SENTRON rail profile — no panel rework needed to drop it into an existing 5SL lineup.
The 5SL6 family is the standard SENTRON MCB line for residential and infrastructure builds. If you're filling a panel that was specified around the 5SL3120-6MB (a higher-current variant), the 5SL6106-6BB shares the same 1-pole form factor, same DIN-rail clip, and same 18 mm width — it drops in without rewiring as long as the ampacity matches your branch.
The B characteristic (3–5× In) keeps it selective with downstream fuses or smaller MCBs on lighting and receptacle circuits. Mechanical endurance of 10 000 switching cycles is typical for this class; it's not a motor-starting contactor, but it handles routine on/off for isolation and fault clearing.