The Siemens 5SL6106-7RC is a SENTRON miniature circuit breaker (MCB) rated 6 A with a C tripping characteristic and a 7.5 kA breaking capacity according to EN 60898.
The C characteristic means the magnetic trip fires at 5 to 10 times rated current — 30 to 60 A for this 6 A unit — so it handles moderate inrush from small motor loads or capacitive circuits without nuisance tripping, while still clearing hard faults fast. Single-pole construction (1P) switches the line conductor only. Rated for single-phase operation at 250 V AC and multi-phase at 440 V AC, so it fits a 230/400 V distribution board as a branch-circuit protector.
Snaps onto a standard 35 mm DIN rail; 18 mm width (1 MW) means you can pack 12 of these per 216 mm of rail.