The Siemens 5SL5103-6CC is a 1-pole miniature circuit breaker rated for 125 V DC with a 10 kA breaking capacity and a B3 tripping characteristic. It belongs to the 5SL5 series of DIN-rail mounted MCBs designed for DC branch circuit protection in control panels and distribution boards.
DC rating and breaking capacity
The 125 V DC rating covers common 110 V DC and 125 V DC control circuits found in switchgear, relay panels, and industrial automation. On a 125 V DC rail, this breaker clears a short-circuit fault within the rated 10 kA without cascading upstream.
Panel integration
The B3 curve is factory-set and non-adjustable; verify coordination with downstream loads before specifying. The DC rating applies only when the breaker is used in a DC circuit — AC ratings differ and are not listed for this variant.