The Siemens 5SJ6208-7 is a 2-pole miniature circuit breaker from the SENTRON 5SJ6 family, rated 8 A at 400 V AC with a C tripping characteristic — meaning it is designed for moderate inrush loads such as small motor circuits, lighting banks, and control transformers where the starting current exceeds the nominal rating but stays within the C-curve magnetic trip window (5–10× In). The 2-pole configuration switches both line conductors, which is required for single-phase 230 V circuits in many regions or for two-wire 400 V line-to-line loads. The IP20 finger-safe terminals (with conductors connected) meet the basic touch-protection requirement inside an enclosed panel.
The terminal accepts solid or stranded conductors from 0.75 mm² up to 25 mm², which covers the full range of wire sizes typically used for an 8 A branch circuit (1.5 mm² to 4 mm² are common, but the 25 mm² upper limit accommodates a feed-through or daisy-chain application). Mounting position is unrestricted, so the breaker can be oriented vertically, horizontally, or upside-down on the rail without derating the thermal trip. The mechanical service life of 20 000 switching cycles is typical for an MCB in this class — adequate for routine isolation and fault clearing, but not intended for frequent load-break duty like a contactor.