What the ratings mean for fit
The Siemens 5SL6215-7BB is a SENTRON 5SL6 miniature circuit breaker (MCB) with a C-curve trip characteristic, rated 1.6 A at 400 V AC, 2-pole, and a 6 kA breaking capacity per EN 60898 and IEC 60947-2. The C-curve means it trips between 5 and 10 times rated current — standard for general-purpose loads like lighting, small transformers, and resistive heaters in residential and infrastructure panels. The 6 kA rating tells you it can safely interrupt a fault current up to that level without welding contacts or cascading upstream; if your prospective short-circuit current at the panel exceeds 6 kA, you need a higher-rated device upstream.
DIN-rail footprint and panel integration
This MCB occupies 2 width units (36 mm) on a standard DIN rail, with a depth of 76 mm and height of 90 mm. The 70 mm installation depth leaves clearance behind the rail for wiring. Mounting position is any, so vertical or horizontal orientation in the enclosure is fine. IP20 with connected conductors means it's protected against finger contact but not washdown — standard for dry indoor panels. The sealable design allows tamper-proofing after commissioning.
Environmental and compliance notes
Rated for ambient temperatures from -40 °C to 75 °C, with periodic humidity up to 95% at +55 °C. Halogen-free and silicon-free construction — relevant for clean-room or sensitive electronic environments where outgassing matters. Overvoltage category III and pollution degree 2, which covers fixed-installation panels in residential and commercial buildings. The 10 000 mechanical switching cycles typical service life is adequate for most branch-circuit protection roles.