DC-rated miniature circuit breaker for 125 A branch protection
The Siemens 5SP5192-7CC is a 1-pole miniature circuit breaker rated for 220 V DC with a 10 kA interrupting capacity, C-curve trip characteristic, and a 125 A current rating. The C-curve means the magnetic trip operates at 5 to 10 times rated current, suited for moderate inrush loads such as DC motor drives, control transformers, or capacitor banks on a 220 V DC bus. At 125 A and 220 V DC, this breaker handles a continuous load of 27.5 kW on a DC circuit, with the 10 kA interrupting rating ensuring it can clear a bolted fault at the panel without upstream coordination issues.
Panel integration notes
As a 1-pole DIN-rail mount, it occupies a single 18 mm module width in the enclosure, leaving space for adjacent breakers or busbar feeders in a DC sub-distribution board. The 220 V DC rating is specific — verify the system voltage is within the breaker's rated DC voltage before specifying.