What it is and what it does
The Siemens 5SL6132-6MB is a SENTRON miniature circuit breaker from the 5SL series, rated 32 A at 230/400 V AC with a B tripping characteristic and a 6 kA breaking capacity per EN 60898. One-pole, single modular width (18 mm), it snaps onto a DIN rail and protects final circuits in residential and light commercial panels. The B curve means it trips between 3 and 5 times rated current — standard for general-purpose socket outlets and lighting circuits where inrush is modest.
Key ratings and what they mean for fit
Breaking capacity of 6 kA at 230/400 V AC per EN 60898 is the fault-interruption ceiling for this MCB. In a domestic or small commercial panel fed by a transformer with typical short-circuit current below 6 kA, it clears faults without upstream damage. Overvoltage category III and pollution degree 2 match the environment inside a distribution board — no special sealing needed. The 10 000 mechanical switching cycles typical service life covers years of normal operation. Rated voltage 250 V single-phase, 400 V three-phase, and max 440 V multi-phase means it fits standard 230/400 V grids across Europe and most of Asia. The 72 V DC maximum rating allows use in some DC circuits, but the B curve is not optimized for inductive DC loads — verify coordination. Temperature range -40 to 75 °C and any mounting position give flexibility for outdoor enclosures or unconditioned spaces. IP20 with connected conductors is the usual protection for a panel interior — no washdown rating.