The Siemens 5SL5132-7CC is a 1-pole miniature circuit breaker from the SENTRON 5SL series, rated for 32 A with a C tripping characteristic and a DC voltage rating of 125 V. It is designed for DC branch-circuit protection in residential and infrastructure applications, with a breaking capacity of 10 kA. The C-curve means it trips between 5 and 10 times rated current, suited for moderate inrush loads like lighting banks or small DC power supplies where you need to ride through the start-up pulse without nuisance trips.
DC rating and what it means for fit
This breaker is rated for DC circuits up to 125 V, which is the maximum voltage per pole. In a DC system, arc extinction is harder than AC because there is no natural zero-crossing, so the 10 kA breaking capacity at 125 V DC is the relevant fault-interruption figure — not the AC rating. If your BOM calls for DC protection at this voltage and current, the 5SL5132-7CC is dimensioned for it. The single-pole form factor (18 mm width, one width unit) snaps onto standard DIN rail and occupies one slot in a distribution board.
Integration and environment
Mounts in any position on DIN rail, with an installation depth of 70 mm and overall depth of 76 mm. The housing is IP20 with connected conductors — finger-safe terminals but not sealed against moisture, so it belongs inside a panel or enclosure, not in a washdown zone. Rated for ambient temperatures from -40 °C to 75 °C, covering most indoor and sheltered outdoor enclosures. Pollution degree 2 and overvoltage category III are standard for fixed-installation distribution boards.