The Siemens 5SY5201-7CC12 is a 2-pole miniature circuit breaker from the 5SY5 series, rated for 440V DC with a 10kA breaking capacity and a C1 tripping characteristic. This is a DC-rated MCB, not a standard AC device — the 440V DC rating and the C1 curve (1x to 5x In instantaneous trip) make it suited for DC load circuits in industrial control panels, UPS systems, or photovoltaic combiners where overcurrent and short-circuit protection on the DC side is required.
Integration Notes
As a 2-pole DIN-rail mounted MCB, the 5SY5201-7CC12 occupies two module widths in a standard 35mm DIN enclosure. The C1 characteristic means instantaneous trip between 1x and 5x rated current — verify coordination with downstream loads that have inrush, as the low threshold may cause nuisance tripping on capacitive or motor-starting DC loads.