The 5SY4180-7 is a 1-pole SENTRON miniature circuit breaker with a C tripping characteristic, rated 10 kA breaking capacity per EN 60898-1 at 400 V AC.
DC capability and dual-standard compliance
Same part, different passport: the 5SY4180-7 carries a DC breaking capacity of 15 kA per IEC 60947-2 at 60 V DC (72 V max operating voltage). That is a higher interrupting rating than its AC figure — common on C-curve MCBs because DC arcs are harder to extinguish, so the manufacturer rates conservatively on the AC side. The dual standard (EN 60898-1 for residential/commercial branch circuits, IEC 60947-2 for industrial panelboard use) means this one order code covers both the lighting panel and the control transformer secondary. No need to stock two part numbers.
DIN-rail fit and environmental limits
Ambient operating range is -40 °C to 75 °C, with humidity derating above 55 °C (95% RH up to 55 °C, 55% RH up to 70 °C, 35% RH up to 75 °C).