The Siemens 5SL4101-7CC is a SENTRON miniature circuit breaker (MCB) — one pole, rated 1 A at 400 V AC with a C-curve trip characteristic and 10 kA breaking capacity per EN 60898. It snaps onto DIN rail, occupies one modular width (18 mm), and is rated for residential buildings and infrastructure panels. The IP20 enclosure (with conductors connected) is standard for inside-the-panel mounting; no washdown rating here.
At 1 A, that's 5 to 10 A magnetic trip; expect nuisance trips if you're feeding a pure resistive load with no startup surge. The 10 kA breaking capacity (per EN 60898) tells you it can safely interrupt a fault current up to 10,000 A at 400 V AC without welding contacts or cascading upstream — adequate for most residential and light commercial service entrances. Derating matters: at 30 °C ambient it carries the full 1 A; at 40 °C that drops to 0.95 A, at 45 °C to 0.92 A, at 50 °C to 0.89 A, and at 55 °C to 0.86 A. The thermal curve is the binding spec, not the 30 °C number. Single-phase operation is rated 250 V AC; multi-phase (two or three poles ganged) goes to 440 V AC. DC rating maxes at 72 V — fine for control circuits, not for a DC bus.