The Siemens 5SY6102-7CC is a SENTRON miniature circuit breaker (MCB) — a 1-pole unit with a C-curve tripping characteristic, rated 2 A at 440 V AC single-phase or multi-phase, and a 6 kA breaking capacity per EN 60898. That C-curve means it's designed for moderate inrush loads like motor starters or small transformers: the magnetic trip activates between 5 and 10 times rated current, so it holds through a brief start-up surge but clears a hard fault fast. The 6 kA rating is the maximum prospective fault current it can safely interrupt at 440 V AC — enough for most sub-distribution boards in commercial or light industrial panels.
Panel fit and environmental range
Width is 18 mm (one modular unit), depth 76 mm, height 90 mm. Snaps onto DIN rail via the quick-assembly system; mounting position is any orientation. The IP20 rating (with connected conductors) is standard for enclosed distribution boards — not for wet or outdoor locations. Ambient temperature range is -40 °C to 75 °C, with derated current values above 35 °C: 1.88 A at 40 °C, 1.82 A at 45 °C, 1.75 A at 50 °C, 1.68 A at 55 °C. Pollution degree 3 and overvoltage category III suit it for fixed installations where transient overvoltages are expected.