What this MCB is and what it does
The Siemens 5SL6232-6BB is a 2-pole miniature circuit breaker from the SENTRON family, rated 32 A at 30 °C with a B tripping characteristic. It provides overcurrent and short-circuit protection at 400 V AC, with a breaking capacity of 6 kA per both IEC 60898 and IEC 60947-2 — the same figure under both standards, so no coordination gap between residential and industrial listings. The B curve means the magnetic trip operates at 3 to 5 times rated current — suited for resistive and general-purpose loads where inrush is moderate. At 32 A, this covers lighting panels, small distribution boards, and infrastructure circuits. The 6 kA SCCR is adequate for most secondary distribution panels fed by a transformer with typical impedance; for higher fault-current locations, check the upstream coordination.
Temperature derating and installation
Rated 32 A at 30 °C, the breaker derates to 29.56 A at 40 °C, 28.16 A at 45 °C, and 25.48 A at 55 °C. If the panel ambient runs at 40 °C, the continuous load should not exceed 29.56 A — no exceptions. The breaker is 2 modular-width units (36 mm wide), snaps onto DIN rail, and can be mounted in any position. Sealable per the evidence, which matters for lockout/tagout compliance in panels where positive isolation verification is required. Depth is 76 mm, height 90 mm — standard for this class, so it drops into existing SENTRON or third-party distribution boards without panel modification. The IP20 rating (with connected conductors) is typical for enclosed distribution boards; if the breaker sits in a washdown area, it must be behind a sealed enclosure door.