The Siemens 5SL6101-6CC is a SENTRON miniature circuit breaker — 1-pole, 1 A rated current, B tripping characteristic, 6 kA breaking capacity per EN 60898. The 6 kA interrupting rating covers most domestic and light-infrastructure fault levels; if your service entrance can deliver more, you'd step up to a higher-capacity frame.
DIN-rail fit and panel integration
One modular width (18 mm) on a standard DIN rail, 76 mm deep into the enclosure.
Thermal derating — what the numbers mean
At 40 °C it derates to 0.94 A, at 45 °C to 0.91 A, at 50 °C to 0.88 A, and at 55 °C to 0.85 A.