Siemens SENTRON 5SY4215-8CC — 1.6 A D-curve MCB, 2-pole
The Siemens SENTRON 5SY4215-8CC is a 2-pole miniature circuit breaker with a D tripping characteristic, rated 1.6 A at 35 °C and 440 V AC for multi-phase operation. The D-curve means it tolerates high inrush currents — typical for motor, transformer, or lighting ballast loads — without nuisance tripping, while still clearing a fault at its 10 kA breaking capacity per EN 60898. That 10 kA rating at 440 V AC tells you it safely interrupts a short-circuit up to that level without upstream damage, which is the spec that governs coordination in a distribution board.
Thermal derating and environmental limits
Rated current drops with ambient temperature: 1.6 A at 35 °C, 1.5 A at 40 °C, 1.45 A at 45 °C, 1.4 A at 50 °C, 1.35 A at 55 °C. The surrounding temperature influence curve caps at 95% RH up to 55 °C, then 55% RH up to 70 °C, then 35% RH up to 75 °C. Operating range spans -40 °C to 75 °C, so it handles unheated outdoor cabinets or hot machine enclosures. Pollution degree 3 and overvoltage category III suit industrial panel environments.
Mounting and wiring notes
Snaps onto DIN rail via the quick-assembly system; any mounting position allowed. Combined terminals top and bottom accept wiring without extra accessories. Installation depth is 70 mm (device depth 76 mm). IP20 with connected conductors — standard for enclosed distribution boards. Halogen-free and silicon-free construction matters for environments sensitive to outgassing (clean rooms, food processing). Touch protection is built in.